Yokohama Open Data Portal
This overview was generated with AI from the public sources listed below and checked against them before publication. It has not had a complete human fact-check — treat it as a starting point and follow the sources.
How this atlas is made · What “last verified” means · What “source-checked” means · The full record behind this page
✎ Updated 20 Aug 2026 Publication date recorded for 2 sources. What changed →
Yokohama runs its open-data catalogue on CKAN at data.city.yokohama.lg.jp. Counted through the portal's own search API in August 2026, all 654 datasets carry a Creative Commons Attribution licence and none is left without one — a completeness almost no city in this atlas reaches, and the opposite of portals that publish downloadable files under no licence at all. The catalogue records themselves were created from March 2024, while the documents inside them reach back further.
what does this mean?
The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →📊 Impact
654 of 654 datasets licensed CC BY, with zero unlicensed records, counted directly through the portal's package_search API in August 2026.
🎓 Lesson
Licence coverage is the cheapest thing to verify about an open-data portal and the most often skipped: one API call separates a catalogue that can be reused from one that merely can be downloaded.
Sources
Show your work What this page rests on and what it can’t tell you · all 3 claims with their sources · the forensic record
Evidence Passport · public beta 3 addressable claims, 2 source dossiers, one permanent baseline. The passport is unreviewed — an AI-assisted structural migration, not a human or expert endorsement. Every revision keeps a permanent copy under revision history.
Inspect the claims, one by one — verbatim text, sources and caveats for all 3
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-9ed2c3d764895104
quantitative
all 654 datasets carry a Creative Commons Attribution licence and none is left without one
Sources carrying this claim
clm-e8961e1e8ea2167d
quantitative
The catalogue records themselves were created from March 2024
Sources carrying this claim
clm-7d6997ccbc6a1c2f
quantitative
654 of 654 datasets licensed CC BY, with zero unlicensed records
Sources carrying this claim
Forensic record — source dossiers, gaps, hashes and the exact revision this page renders
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.
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:8068e31663246ae70548a4b4fb7424f3f815100636dad0e080e7f7516fabee38
- 3
- of 3 claims mapped
- 2
- source dossiers
- 0
- publication dates recorded
- 0
- archives linked
- 0
- exact locators
- 0
- content captures hashed
Governance facts carried by the record
- Operator
- City of Yokohama
- 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
2 source dossiers
Yokohama Open Data Portal
- Stable source ID
src-1186467a365b7287- Publisher
- Name not classified · data.city.yokohama.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
- 2026-08-18
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- No locator recordedDescriptive only — not page/paragraph exact
- Claims linked
- Background source; no baseline claim points here
Yokohama Open Data Portal — package_search API with licence facet
- Stable source ID
src-94e9c413801a82ee- Publisher
- Name not classified · data.city.yokohama.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
- 2026-08-18
- Dossier created
- 2026-08-20
- Retrieved copy
- No local capture recorded
- Archive
- No archived copy linked
- Content hash
- No captured content hash
- Locator
- No locator recordedDescriptive only — not page/paragraph exact
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.
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📎 Cite this project
1001 Smart Cities (2026). “Yokohama Open Data Portal” — Yokohama, Japan. The Smart City Atlas. https://1001smartcities.org/projects/yokohama-open-data/ (last verified 2026-08-18). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.