Counterpedia · Subject

Wikidata observation

Seikan Tunnel

undersea railway tunnel in Japan connecting Hokkaido and Honshu

Observations from Wikidata; separate from governed Counterpedia records. Sources, origins and what has been checked

At a glance

Selected recorded observations. Counterpedia has not independently verified them; inspect the statements for sources and alternative or historical context.

instance of: undersea tunnel
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P31; Statement & references
inception: 10 March 1985
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P571; Statement & references
located in the administrative territorial entity: Shiriuchi
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P131; Statement & references
length: 53850 metres
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P2043; Statement & references
country: Japan
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P17; Statement & references
coordinate location: 41.3157° N, 140.3351° E
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P625; Statement & references
has part(s): Tappi-Kaitei Station
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P527; Statement & references

How these facts are selected

Up to eight distinct properties with readable names and values. One from each available category comes first, then remaining slots follow property category, property code and source order. This keeps names and family details from crowding out work, dates and geography. Media, external identifiers, unnamed targets and statements with incomplete qualifying context stay in the detailed list. The same rule applies to every subject. Context recorded by Wikidata appears beside each selected fact.

Relationships

Outgoing connections are statements about this subject. A connection is not evidence that another subject supports a claim.

country (P17): Japan
has part(s) (P527): Tappi-Kaitei Station
Relationship name unavailable: Japan's longest railway tunnel
Relationship name unavailable: Hokkaido Shinkansen
Relationship name unavailable: 25 kV, 50 Hz AC railway electrification
instance of (P31): undersea tunnel
Relationship name unavailable: Kaikyō Line
has part(s) (P527): Yoshioka-Kaitei Station
Relationship name unavailable: Wikipedia:Vital articles/Level/4Recorded context: point in time: 31 October 2022
Relationship name unavailable: Tsugaru Strait
topic’s main category (P910): Category:Seikan Tunnel
Relationship name unavailable: Japan Freight Railway Company

All projected connections & provider records

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Seikan Tunnel

Other entries this record states a relationship to. Follow one to keep moving through the universe.

Identity & relations

undersea tunnel— instance of (P31)stated relationship

Places

Japan— country (P17)stated relationship

Other connections

Tappi-Kaitei Station— has part(s) (P527)stated relationship
Japan's longest railway tunnel— P2868stated relationship
Hokkaido Shinkansen— P2505stated relationship
25 kV, 50 Hz AC railway electrification— P930stated relationship
Kaikyō Line— P2505stated relationship
Yoshioka-Kaitei Station— has part(s) (P527)stated relationship
Wikipedia:Vital articles/Level/4— P5008stated relationship
Tsugaru Strait— P177stated relationship
Japan Freight Railway Company— P137stated relationship

External identifiers

Category:Seikan Tunnel— topic’s main category (P910)stated relationship

The original records this observation was assembled from, off Counterpedia.

Wikidata: Q99250 ↗

Keep exploring the surrounding neighborhood.

Explore the Seikan Tunnel neighborhood

Assembled from entry read model wikimedia_observation:Q99250, public release sha256:f33228901a35b0683356002a46df9ceb11f399d05f17abb5c7c78256cbf38ba7. This view is served from published release bytes.

Explore incoming and outgoing relationships →

External identifiers (25)

Identifier lookup links, separate from statement references.

P8885: 세이칸 터널
P12385: seikan-tunnel
P11408: 青函トンネル
P5019: seikantunnel
P6900: 青函トンネル
P8313: Seikantunnelen
P8189: 987007544267405171
Library of Congress (LCCN): sh90006061 ↗
P349: 001141355
P14541: 2Ue7my
P646: /m/024456
P9545: 225721
P402: 5458271
P6706: Seikan
P7772: seikan-tunnel
P3222: seikantunneln
P1296: 0503385
GND: 7631435-2 ↗
Encyclopædia Britannica: topic/Seikan-Tunnel
P4342: Seikantunnelen
P10565: 406002
P8349: 57781
VIAF: 304060301 ↗
P4839: Entity["Tunnel", "Seikan"]
P454: 20001077

Sources and origins

Structured observations: Statements in this view were observed in Wikidata. Their source identifiers and carried history remain available for inspection.
Cited references: Works, URLs and identifiers attached to particular statements. A cited locator is not an independently established support finding. Inspect statement references
Retained evidence: This view carries observation data. It does not supply independently captured copies of the cited documents or establish their custody. Discovering a reference does not register a governed Source Record.
Checks: No completed Check is associated with these statements in this view. Check execution is currently unavailable.

These observations are not governed Counterpedia claims. The origin of an observation can differ from the author or publisher of its cited source.

Documentary coverage

Documentary identifiers

No source identifiers recorded

Identifiers Counterpedia can route

No lookup route known

Reference-route hints

Reference route hint recorded

“Routable” means Counterpedia knows an approved provider capability that can investigate the identifier. It does not mean the source has been captured or checked.

Validation state

1. In Wikidata
No source identifiers recorded.
2. Lookup route
No source identifiers recorded.
3. Lookup result
No lookup recorded for this page.
4. Saved copy
No saved copy for this page.
5. Fixed version
No fixed source version for this page.
6. Check result
Not checked.

These stages describe what this page can show from governed subject-scoped records. A lookup route does not mean a source was found; a lookup result does not mean bytes were saved; and a saved copy does not mean a fixed source version or a Check result exists.

Research frontier

Ready to investigate

None of the recorded identifier routes is marked routable.

Still unresolved

25 identifier routes and 14 reference hints remain research inputs rather than governed evidence.

Authority boundary

What this page establishes

It establishes what the retained Wikimedia observation contains and what investigation paths Counterpedia can describe from that material.

What it does not establish

A Wikidata statement is not automatically Counterpedia evidence.
A routable identifier is not a captured source.
A captured representation is not automatically a fixed source version.
A fixed source version is not automatically a Check result.
Graph proximity and reference counts are not support or corroboration.
A provider observation and candidate locator do not establish source bytes or support.

Presentation contract

Stage template: counterpedia.reader.profile.v1
Counterpedia composition: counterpedia.product.subject.profile.v1

Statements & recorded references

Open a statement to see the references attached to it. Context can limit when, where or how a statement applies. Recorded source URLs, identifier resolvers and source works describe where Wikidata points; none establishes source support or a completed Check.

Check execution is unavailable in this preview. Exact recorded locators remain available to inspect and open.

country: JapanReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P17
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P17",
  "targetRef": "Q17",
  "targetLabel": "Japan"
}
```
has part(s): Tappi-Kaitei StationReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P527
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P527",
  "targetRef": "Q23498231",
  "targetLabel": "Tappi-Kaitei Station"
}
```
Relationship name unavailable: Japan's longest railway tunnelReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P2868
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2868",
  "targetRef": "Q117463409",
  "targetLabel": "Japan's longest railway tunnel"
}
```
Relationship name unavailable: https://www.jrhokkaido.co.jp/network/seikan/Reference count not carriedRecorded context: Relationship name unavailable: JapaneseThis statement has context that cannot be fully shown here. An unresolved name or missing qualification can change how it should be understood.
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P856
No exact source locator is carried for this statement in this view.
Qualifiers
Relationship name unavailable: Japanese
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P856",
  "literalValue": "https://www.jrhokkaido.co.jp/network/seikan/",
  "qualifiers": {
    "observedSnakCount": 1,
    "retainedSnaks": [
      {
        "propertyPid": "P407",
        "valueLabel": "Japanese",
        "datatype": "wikibase-item",
        "datavalue": {
          "type": "wikibase-entityid",
          "value": {
            "entity-type": "item",
            "id": "Q5287",
            "numeric-id": 5287
          }
        },
        "snaktype": "value"
      }
    ],
    "truncated": false
  }
}
```
Relationship name unavailable: Hokkaido Shinkansen1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P2505
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2505",
  "targetRef": "Q1364115",
  "targetLabel": "Hokkaido Shinkansen",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143",
      "P4656"
    ],
    "referenceHashes": [
      "fd755cd8670ddcf05f9317ded4d1d496661594bd"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
Relationship name unavailable: 25 kV, 50 Hz AC railway electrificationReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P930
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P930",
  "targetRef": "Q106530439",
  "targetLabel": "25 kV, 50 Hz AC railway electrification"
}
```
Commons category: Seikan Tunnel1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P373
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P373",
  "literalValue": "Seikan Tunnel",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143"
    ],
    "referenceHashes": [
      "2e7fa0083ba1c302cdcf3fa65c613f90daeb4c37"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
Relationship name unavailable: 青函トンネル入口広場トンネル神社 P1261002.JPGReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P5252
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P5252",
  "literalValue": "青函トンネル入口広場 トンネル神社 P1261002.JPG"
}
```
instance of: undersea tunnelReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P31
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P31",
  "targetRef": "Q1317590",
  "targetLabel": "undersea tunnel"
}
```
Relationship name unavailable: Kaikyō LineReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P2505
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2505",
  "targetRef": "Q907716",
  "targetLabel": "Kaikyō Line"
}
```
image: Seikan Tunnel entrance - dual-gauge track.jpgReference count not carriedRecorded context: Relationship name unavailable: Vjezd do tunelu na ostrově Honšú (cs)This statement has context that cannot be fully shown here. An unresolved name or missing qualification can change how it should be understood.
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P18
No exact source locator is carried for this statement in this view.
Qualifiers
Relationship name unavailable: Vjezd do tunelu na ostrově Honšú (cs)
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P18",
  "literalValue": "Seikan Tunnel entrance - dual-gauge track.jpg",
  "qualifiers": {
    "observedSnakCount": 1,
    "retainedSnaks": [
      {
        "propertyPid": "P2096",
        "datatype": "monolingualtext",
        "datavalue": {
          "type": "monolingualtext",
          "value": {
            "language": "cs",
            "text": "Vjezd do tunelu na ostrově Honšú"
          }
        },
        "snaktype": "value"
      }
    ],
    "truncated": false
  }
}
```
Relationship name unavailable: Inside seikan tunnel.JPGReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P5775
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P5775",
  "literalValue": "Inside seikan tunnel.JPG"
}
```
Relationship name unavailable: Seikan tunnel nameplate.JPGReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1801
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1801",
  "literalValue": "Seikan tunnel nameplate.JPG"
}
```
Relationship name unavailable: Seikan Tunnel profile diagram.svgReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P2713
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2713",
  "literalValue": "Seikan Tunnel profile diagram.svg"
}
```
has part(s): Yoshioka-Kaitei StationReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P527
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P527",
  "targetRef": "Q848922",
  "targetLabel": "Yoshioka-Kaitei Station"
}
```
coordinate location: 41.3157° N, 140.3351° E1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P625
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P625",
  "literalValue": {
    "altitude": null,
    "globe": "http://www.wikidata.org/entity/Q2",
    "latitude": 41.3157,
    "longitude": 140.3351,
    "precision": null
  },
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143"
    ],
    "referenceHashes": [
      "fa278ebfc458360e5aed63d5058cca83c46134f1"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```

inception: 10 March 19851 recorded reference

Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.

About this property

This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.

Wikidata property P571

No exact source locator is carried for this statement in this view.

Statement identity, reference hashes and carried detail

{
  "predicate": "P571",
  "literalValue": {
    "after": 0,
    "before": 0,
    "calendarmodel": "http://www.wikidata.org/entity/Q1985727",
    "precision": 11,
    "time": "+1985-03-10T00:00:00Z",
    "timezone": 0
  },
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143",
      "P4656"
    ],
    "referenceHashes": [
      "6d6c594a9c52aa3b7e7ce14758c010c9cf338381"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}

Relationship name unavailable: Wikipedia:Vital articles/Level/4Reference count not carriedRecorded context: point in time: 31 October 2022

Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.

About this property

The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.

Wikidata property P5008

No exact source locator is carried for this statement in this view.

Qualifiers

point in time: 31 October 2022

Statement identity, reference hashes and carried detail

{
  "predicate": "P5008",
  "targetRef": "Q6173448",
  "targetLabel": "Wikipedia:Vital articles/Level/4",
  "qualifiers": {
    "observedSnakCount": 1,
    "retainedSnaks": [
      {
        "propertyPid": "P585",
        "datatype": "time",
        "datavalue": {
          "type": "time",
          "value": {
            "after": 0,
            "before": 0,
            "calendarmodel": "http://www.wikidata.org/entity/Q1985727",
            "precision": 11,
            "time": "+2022-10-31T00:00:00Z",
            "timezone": 0
          }
        },
        "snaktype": "value"
      }
    ],
    "truncated": false
  }
}

Relationship name unavailable: Tsugaru Strait1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P177
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P177",
  "targetRef": "Q271521",
  "targetLabel": "Tsugaru Strait",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143"
    ],
    "referenceHashes": [
      "d4bd87b862b12d99d26e86472d44f26858dee639"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
topic’s main category: Category:Seikan Tunnel1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P910
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P910",
  "targetRef": "Q18742314",
  "targetLabel": "Category:Seikan Tunnel",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143"
    ],
    "referenceHashes": [
      "a29a646602abf65105ed0f39a44231c962ece9ee"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
Relationship name unavailable: Japan Freight Railway CompanyReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P137
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P137",
  "targetRef": "Q1190669",
  "targetLabel": "Japan Freight Railway Company"
}
```
Relationship name unavailable: Seikan FerryReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1365
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1365",
  "targetRef": "Q11661111",
  "targetLabel": "Seikan Ferry"
}
```
Relationship name unavailable: Japan Railway Construction, Transport and Technology AgencyReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P127
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P127",
  "targetRef": "Q6157804",
  "targetLabel": "Japan Railway Construction, Transport and Technology Agency"
}
```

Relationship name unavailable: 13 March 19881 recorded reference

Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.

About this property

The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.

Wikidata property P1619

No exact source locator is carried for this statement in this view.

Statement identity, reference hashes and carried detail

{
  "predicate": "P1619",
  "literalValue": {
    "after": 0,
    "before": 0,
    "calendarmodel": "http://www.wikidata.org/entity/Q1985727",
    "precision": 11,
    "time": "+1988-03-13T00:00:00Z",
    "timezone": 0
  },
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P1065",
      "P813",
      "P854"
    ],
    "referenceHashes": [
      "505d9a6b5ae3152598a140b083a145d0971446d7"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}

Relationship name unavailable: Seikan Tunnel 3d cross section 1a.svgReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P2713
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2713",
  "literalValue": "Seikan Tunnel 3d cross section 1a.svg"
}
```
Relationship name unavailable: 青函トンネル (ja)Reference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1705
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1705",
  "literalValue": {
    "language": "ja",
    "text": "青函トンネル"
  }
}
```
located in the administrative territorial entity: ShiriuchiReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P131
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P131",
  "targetRef": "Q1354297",
  "targetLabel": "Shiriuchi"
}
```
Relationship name unavailable: Honshu1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P559
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P559",
  "targetRef": "Q13989",
  "targetLabel": "Honshu",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143"
    ],
    "referenceHashes": [
      "fa278ebfc458360e5aed63d5058cca83c46134f1"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
Relationship name unavailable: Hokkaido Railway CompanyReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P137
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P137",
  "targetRef": "Q498930",
  "targetLabel": "Hokkaido Railway Company"
}
```
located in the administrative territorial entity: ImabetsuReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P131
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P131",
  "targetRef": "Q1362366",
  "targetLabel": "Imabetsu"
}
```
Relationship name unavailable: 1067 mm track gaugeReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1064
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1064",
  "targetRef": "Q1193463",
  "targetLabel": "1067 mm track gauge"
}
```

Relationship name unavailable: start of construction1 recorded referenceRecorded context: point in time: 8 May 1964

Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.

About this property

The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.

Wikidata property P793

No exact source locator is carried for this statement in this view.

Qualifiers

point in time: 8 May 1964

Statement identity, reference hashes and carried detail

{
  "predicate": "P793",
  "targetRef": "Q27136782",
  "targetLabel": "start of construction",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P1065",
      "P813",
      "P854"
    ],
    "referenceHashes": [
      "505d9a6b5ae3152598a140b083a145d0971446d7"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  },
  "qualifiers": {
    "observedSnakCount": 1,
    "retainedSnaks": [
      {
        "propertyPid": "P585",
        "datatype": "time",
        "datavalue": {
          "type": "time",
          "value": {
            "after": 0,
            "before": 0,
            "calendarmodel": "http://www.wikidata.org/entity/Q1985727",
            "precision": 11,
            "time": "+1964-05-08T00:00:00Z",
            "timezone": 0
          }
        },
        "snaktype": "value"
      }
    ],
    "truncated": false
  }
}

Relationship name unavailable: Fukushima Town Seikan Tunnel MuseumReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P8786
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P8786",
  "targetRef": "Q11593178",
  "targetLabel": "Fukushima Town Seikan Tunnel Museum"
}
```
Relationship name unavailable: standard-gauge railwayReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1064
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1064",
  "targetRef": "Q1999572",
  "targetLabel": "standard-gauge railway"
}
```
Relationship name unavailable: Seikantunnel - Tsugaru street detail.PNG1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P15
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P15",
  "literalValue": "Seikantunnel - Tsugaru street detail.PNG",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143",
      "P4656"
    ],
    "referenceHashes": [
      "fd755cd8670ddcf05f9317ded4d1d496661594bd"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
length: 53850 metres1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P2043
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2043",
  "literalValue": {
    "amount": "+53850",
    "unit": "http://www.wikidata.org/entity/Q11573"
  },
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143"
    ],
    "referenceHashes": [
      "9a24f7c0208b05d6be97077d855671d1dfdbc0dd"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
Relationship name unavailable: Seikan Tunnel1 recorded reference
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P935
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P935",
  "literalValue": "Seikan Tunnel",
  "referencesSummary": {
    "referenceCount": 1,
    "referencePropertyPids": [
      "P143"
    ],
    "referenceHashes": [
      "3bf39867b037e8e494a8389ae8a03bad6825a7fc"
    ],
    "propertyPidSummaryTruncated": false,
    "referenceHashSummaryTruncated": false
  }
}
```
Relationship name unavailable: 260 Q180154Reference count not carriedRecorded context: Relationship name unavailable: Hokkaido ShinkansenThis statement has context that cannot be fully shown here. An unresolved name or missing qualification can change how it should be understood.
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P3086
No exact source locator is carried for this statement in this view.
Qualifiers
Relationship name unavailable: Hokkaido Shinkansen
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P3086",
  "literalValue": {
    "amount": "+260",
    "unit": "http://www.wikidata.org/entity/Q180154"
  },
  "qualifiers": {
    "observedSnakCount": 1,
    "retainedSnaks": [
      {
        "propertyPid": "P3005",
        "valueLabel": "Hokkaido Shinkansen",
        "datatype": "wikibase-item",
        "datavalue": {
          "type": "wikibase-entityid",
          "value": {
            "entity-type": "item",
            "id": "Q1364115",
            "numeric-id": 1364115
          }
        },
        "snaktype": "value"
      }
    ],
    "truncated": false
  }
}
```
instance of: railway tunnelReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P31
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P31",
  "targetRef": "Q1311958",
  "targetLabel": "railway tunnel"
}
```

Continue exploring

Inspect all recorded statements in pages →

Explore the relationship map Search for this name Browse other subjects Browse Undersea tunnel Browse Railway tunnel

Data and provenance

Wikidata entity IDs are external identifiers, not Counterpedia canonical subject identities. Rendering this page does not mint a governed identity. Release identities and artifact hashes identify the data used for this view; none establishes verification.

Provenance rows: 66
Acquisition repository: thelaplage/counterpedia-acquisition
Acquisition revision: e6add6a4d8e1668a9ac486407e52974724563ce1, 891f24c5cca64aa69b1dc1b2150e991b940171b0
Provider identity · Observation origin: Wikidata · External entity ID: Q99250 on Wikidata ↗
Served release: sha256:f33228901a35b0683356002a46df9ceb11f399d05f17abb5c7c78256cbf38ba7

No exact claim–source–Check association has been supplied to this page. Recorded references do not establish verification.

graph_membership != truth
graph_edge != support
repeated_identifier != independent_corroboration
projection != admission
Serving a published subset: joined entities + 1-hop neighborhood of 35,994 exact Wikipedia–Wikidata title matches.

Carried provenance rows

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  },
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  },
  {
    "family": "wikimedia_graph_row",
    "detail": {
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  },
  {
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    "detail": {
      "acquisition_repo": "thelaplage/counterpedia-acquisition",
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  {
    "family": "wikimedia_graph_row",
    "detail": {
      "acquisition_repo": "thelaplage/counterpedia-acquisition",
      "acquisition_revision": "e6add6a4d8e1668a9ac486407e52974724563ce1",
      "family": "wikidata_relationships",
      "input_row_digest": "sha256:7e15da4eb0d7f9a2765f5e41d1087b1bcabeb4200b618ca94a49dc38319e6955",
      "output_file": "relationships.ndjson",
      "row_index": 248373,
      "snapshot_id": "wikidata-widen0-848k-relationships@2026-08-24"
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  },
  {
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      "acquisition_revision": "e6add6a4d8e1668a9ac486407e52974724563ce1",
      "family": "wikidata_relationships",
      "input_row_digest": "sha256:7b74f64a23e33037eb5fb4faca6be986b9720a5afda3f2de11e2653bda89d4bb",
      "output_file": "relationships.ndjson",
      "row_index": 248396,
      "snapshot_id": "wikidata-widen0-848k-relationships@2026-08-24"
    }
  },
  {
    "family": "wikimedia_graph_row",
    "detail": {
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      "acquisition_revision": "e6add6a4d8e1668a9ac486407e52974724563ce1",
      "family": "wikidata_relationships",
      "input_row_digest": "sha256:d1e37b0cfbe07b3a6d242f6625daaca76743d9bc4aa00ecf05682230b75363bc",
      "output_file": "relationships.ndjson",
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      "snapshot_id": "wikidata-widen0-848k-relationships@2026-08-24"
    }
  },
  {
    "family": "wikimedia_graph_row",
    "detail": {
      "acquisition_repo": "thelaplage/counterpedia-acquisition",
      "acquisition_revision": "e6add6a4d8e1668a9ac486407e52974724563ce1",
      "family": "wikidata_relationships",
      "input_row_digest": "sha256:484c66a9a1108ed1f8bc02bf7f3693af7efc8dcc2d55525945d1104579bd0664",
      "output_file": "relationships.ndjson",
      "row_index": 248380,
      "snapshot_id": "wikidata-widen0-848k-relationships@2026-08-24"
    }
  },
  {
    "family": "wikimedia_graph_row",
    "detail": {
      "acquisition_repo": "thelaplage/counterpedia-acquisition",
      "acquisition_revision": "e6add6a4d8e1668a9ac486407e52974724563ce1",
      "family": "wikidata_enwiki_sitelinks",
      "input_row_digest": "sha256:58b3f4a2272c7c0871d9ef96201e0958a81c7116efd6d305ea589325b26265ce",
      "output_file": "wikipedia_sitelinks.ndjson",
      "row_index": 5983,
      "snapshot_id": "wikidata-widen0-848k-sitelinks@2026-08-24"
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  },
  {
    "family": "wikimedia_graph_row",
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      "acquisition_repo": "thelaplage/counterpedia-acquisition",
      "acquisition_revision": "891f24c5cca64aa69b1dc1b2150e991b940171b0",
      "family": "wikipedia_wikidata_join",
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      "output_file": "wikipedia_wikidata_links.ndjson",
      "row_index": 28683,
      "snapshot_id": "wikimedia-demo-join0@2026-08-28"
    }
  }
]

Classification identities

[
  {
    "classQid": "Q1317590",
    "label": "undersea tunnel",
    "href": "/browse/types/Q1317590"
  },
  {
    "classQid": "Q1311958",
    "label": "railway tunnel",
    "href": "/browse/types/Q1311958"
  }
]

Wikidata content CC0; Wikipedia titles CC BY-SA — attribution.