openapi: 3.2.0 info: title: UTokyo Academic Assets Archives Portal Iiif API version: '2026-08-19' summary: Search, item-representation and IIIF interfaces of the University of Tokyo Academic Assets Archives Portal (東京大学学術資産等アーカイブズポータル). description: 'The Academic Assets Archives Portal is operated by the University of Tokyo Library System on the university''s own hosts. It is the one surface in this profile where the university publishes actual API documentation — at https://da.dl.itc.u-tokyo.ac.jp/portal/help/api, in Japanese only. The English help page at /portal/en/help/api carries a single line, "Only available in Japanese", and links across. A profile built from the English surface alone finds nothing here; that is why this entry exists. The documented page names two APIs — a search API described as OpenSearch, and a harvesting API described as OAI-PMH (covered separately in openapi/university-of-tokyo-oai-pmh-openapi.yml). Alongside them the portal serves item representations in JSON-LD, CSV and refer/BibIX through a `_format` query parameter, and IIIF Presentation and Image endpoints. **The documented search API is not callable from outside.** Every request to `/portal/search`, with and without a browser User-Agent, and from two independent network paths, returned HTTP 403 from Apache/2.4.58. The interface is documented and the portal''s own navigation links to it, but automated access is blocked at the edge. That is recorded here as an observed fact about the deployment, not as a claim that the API does not exist. Metadata follows DC-NDL (国立国会図書館ダブリンコアメタデータ記述), the National Diet Library Dublin Core profile, which the portal names as its base form. Only material for which reuse permission was obtained is exposed through the APIs. ' contact: name: University of Tokyo Library System — Archives Portal email: jitsumu_arch@lib.u-tokyo.ac.jp url: https://da.dl.itc.u-tokyo.ac.jp/portal/en/contact license: name: Reuse conditions of the General Library, The University of Tokyo url: https://www.lib.u-tokyo.ac.jp/ja/library/general/reuse servers: - url: https://da.dl.itc.u-tokyo.ac.jp/portal description: Archives Portal. Institution-operated. - url: https://iiif.dl.itc.u-tokyo.ac.jp description: IIIF Image API server. Institution-operated. tags: - name: iiif description: IIIF Presentation and Image API endpoints. paths: /repo/iiif/{assetId}/manifest: get: operationId: getIiifManifest summary: IIIF Presentation manifest for an item description: IIIF Presentation API 2.1 manifest (`@context` http://iiif.io/api/presentation/2/context.json, `@type` sc:Manifest). Carries label, attribution, license, logo, viewingDirection, `related` to the item page, `seeAlso` to the item JSON-LD, `within` to the parent collection, and a sequence of canvases whose images resolve against the IIIF Image API server. tags: - iiif parameters: - name: assetId in: path required: true schema: type: string format: uuid example: fbd0479b-dbb4-4eaa-95b8-f27e1c423e4b responses: '200': description: IIIF Presentation 2.1 manifest. content: application/json: schema: type: object examples: manifest: summary: 百鬼夜行図, captured live 2026-08-19 externalValue: ../examples/university-of-tokyo-iiif-presentation-manifest.json /iiif/2/{identifier}/info.json: servers: - url: https://iiif.dl.itc.u-tokyo.ac.jp description: IIIF Image API server. Institution-operated. get: operationId: getIiifImageInfo summary: IIIF Image API image information description: IIIF Image API 2.0 information request. The server declares `http://iiif.io/api/image/2/level2.json` compliance, formats tif/jpg/gif/png, qualities bitonal/default/gray/color, 512×512 tiles with scale factors to 128, and maxArea 151,301,008. Identifiers are URL-encoded file paths. tags: - iiif parameters: - name: identifier in: path required: true description: URL-encoded image identifier. schema: type: string example: seishu%2FA00_5995%2F001%2FA00_5995_001_0001.tif responses: '200': description: IIIF Image API 2.0 image information document. content: application/ld+json: schema: type: object examples: info: summary: Captured live 2026-08-19 externalValue: ../examples/university-of-tokyo-iiif-image-info.json /iiif/2/{identifier}/{region}/{size}/{rotation}/{quality}.{format}: servers: - url: https://iiif.dl.itc.u-tokyo.ac.jp description: IIIF Image API server. Institution-operated. get: operationId: getIiifImage summary: IIIF Image API image request description: IIIF Image API 2.0 level 2 image delivery. tags: - iiif parameters: - name: identifier in: path required: true schema: type: string - name: region in: path required: true schema: type: string example: full - name: size in: path required: true schema: type: string example: '!220,220' - name: rotation in: path required: true schema: type: string example: '0' - name: quality in: path required: true schema: type: string enum: - bitonal - default - gray - color - name: format in: path required: true schema: type: string enum: - tif - jpg - gif - png responses: '200': description: The derivative image. content: image/jpeg: schema: type: string format: binary externalDocs: description: APIについて — the portal's own API documentation (Japanese only) url: https://da.dl.itc.u-tokyo.ac.jp/portal/help/api x-operator: institution x-operator-evidence: da.dl.itc.u-tokyo.ac.jp and iiif.dl.itc.u-tokyo.ac.jp are both under u-tokyo.ac.jp. The IIIF manifests carry attribution "東京大学総合図書館 General Library, The University of Tokyo, JAPAN", a logo on iiif.dl.itc.u-tokyo.ac.jp and a license pointing at lib.u-tokyo.ac.jp. No vendor host, title or contact is present anywhere in the surface. x-provenance: generated: '2026-08-19' method: probed source: - https://da.dl.itc.u-tokyo.ac.jp/portal/help/api - https://da.dl.itc.u-tokyo.ac.jp/portal/opensearch.xml - https://da.dl.itc.u-tokyo.ac.jp/portal/search?kywd=tokyo - https://da.dl.itc.u-tokyo.ac.jp/portal/assets/fbd0479b-dbb4-4eaa-95b8-f27e1c423e4b?_format=json - https://da.dl.itc.u-tokyo.ac.jp/portal/repo/iiif/fbd0479b-dbb4-4eaa-95b8-f27e1c423e4b/manifest - https://iiif.dl.itc.u-tokyo.ac.jp/iiif/2/seishu%2FA00_5995%2F001%2FA00_5995_001_0001.tif/info.json note: Parameters and formats transcribed from the university's own Japanese documentation page, then probed live. Where documentation and observed behaviour disagree, both are recorded.