clm-df0e0f424e12dc73
quantitative
Its free, browser-based 3D Viewer (built on TerriaJS/Cesium) visualises buildings, roads and terrain across Tokyo's 23 wards
Permanent project revision
Tokyo Digital Twin
Revision 2026-08-27-source-dating · effective 2026-08-26
Current revision. This is the snapshot used by the live entity page.
unreviewed
Every source on this entry now carries a date key: a publication date where the publisher states one, otherwise an explicit null with the reason on the record.
sha256:f3a86ff6d974a80ef34a299980bb22dc73309d3a36e575236d49e4a51dd2a044
Change set
replace/snapshot/projectFingerprint— Updated projectFingerprint to the current sourced project record.replace/snapshot/sources— Updated sources to the current sourced project record.
- 6
- of 6 claims mapped
- 3
- source dossiers
- 1
- publication dates recorded
- 0
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Claims, one by one
The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.
clm-659892ca7991fa17
quantitative
in December 2024 the city released high-precision aerial point-cloud data for the wards as open data for disaster planning, urban development and research
Sources carrying this claim
clm-49b4c366098b7b18
quantitative
The 3D Viewer is free and runs in an ordinary browser, and in December 2024 the metropolitan government published the 23 wards' aerial point cloud as open data, described by the project as the most precise such data publicly available in Japan
Sources carrying this claim
clm-6242a4760a671539
quantitative
to support recovery after the Noto Peninsula earthquake of 1 January 2024, the TMG published slope collapses, surface cracks and post-quake point clouds on the same viewer so the state before and after could be compared
Sources carrying this claim
clm-4aabe5e04736eb96
descriptive
the use its own government puts forward first is not planning — it is publishing what an earthquake did, on the same viewer, so before and after can be compared
Sources carrying this claim
clm-c462940f44f48c16
descriptive
The viewer itself is still labelled a beta version
Sources carrying this claim
Source dossiers and revision state
This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.
unreviewed
Revision 2026-08-27-source-dating
effective 2026-08-26 · created 2026-08-27
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:f3a86ff6d974a80ef34a299980bb22dc73309d3a36e575236d49e4a51dd2a044
- 6
- of 6 claims mapped
- 3
- source dossiers
- 1
- publication dates recorded
- 0
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Governance facts carried by the record
- Operator
- Tokyo Metropolitan Government
- Actor types
- city-government
- Funding model
- public
- Funding description
- Not recorded
- Cost
- Not recorded
- Ownership
- Not recorded
- Decision rights
- Not recorded
- Exit conditions
- Not recorded
3 source dossiers
Tokyo Metropolitan Government (official)
- Stable source ID
src-e8ec9a5b502fcaa0- Publisher
- Name not classified · english.metro.tokyo.lg.jp
- Type / language
- web-page · language not classified
- Published
- Not recorded
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-26
- Dossier created
- 2026-08-27
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
TMG explainer on the Digital Twin project and the 3D Viewer, including the publication of Noto Peninsula earthquake damage data on the same viewer. Continuously maintained, so it carries no publication date.
TMG Digital Twin roadmap (official)
- Stable source ID
src-7cff033d82c301bd- Publisher
- Name not classified · info.tokyo-digitaltwin.metro.tokyo.lg.jp
- Type / language
- pdf · language not classified
- Published
- Not recorded
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-26
- Dossier created
- 2026-08-27
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Official roadmap for social implementation of the digital twin. The PDF carries no readable publication date, so none is recorded. The page states no publication date.
- Claims linked
- Background source; no baseline claim points here
GIGAZINE (press)
- Stable source ID
src-eec7c41707658190- Publisher
- Name not classified · gigazine.net
- Type / language
- web-page · language not classified
- Published
- 2024-12-27
- Updated
- Not recorded
- Source last checked
- No source-level check date
- Record last verified
- 2026-08-26
- Dossier created
- 2026-08-27
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- Descriptive only — not page/paragraph exact
Open the recorded source note
Dec 2024 release of free 23-ward 3D Viewer and open point-cloud data.
Known limits of this passport
- Publisher names and source languages have not yet been classified; domains are recorded without guessing.
- Existing source notes are descriptive locators, not page- or paragraph-exact citations.
- A missing archive, publication date or content hash is shown as null rather than inferred.
- The project-level evidence grade ranks the strongest source in the entry; it is not a truth score for every claim.