openapi: 3.2.0 info: title: UTokyo Academic Assets Archives Portal Search 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: search description: OpenSearch-described search over the portal. paths: /opensearch.xml: get: operationId: getOpenSearchDescription summary: OpenSearch description document description: An OpenSearch 1.1 description document declaring the portal's search template `https://da.dl.itc.u-tokyo.ac.jp/portal/search?kywd={searchTerms}`. Publicly reachable (HTTP 200) even though the endpoint it describes is not. tags: - search responses: '200': description: OpenSearch 1.1 description. content: application/opensearchdescription+xml: schema: type: string examples: description: summary: Captured live 2026-08-19 externalValue: ../examples/university-of-tokyo-archives-opensearch-description.xml /search: get: operationId: searchAssets summary: Search the portal (documented; blocked to external automated clients) description: Documented by the university as the 検索用API. Every probe returned HTTP 403 Forbidden from Apache/2.4.58 — with a Chrome User-Agent, without one, with and without parameters, and from two independent network paths. Parameters below are transcribed from the university's documentation, not confirmed by response. tags: - search parameters: - name: kywd in: query required: false description: Free-text keyword, per the OpenSearch template. schema: type: string - name: items_per_page in: query required: false description: One of 20, 50, 100, 200. Maximum 200, and 200 is also the default when omitted. Out-of-enum values are coerced downward to the nearest allowed band. schema: type: integer enum: - 20 - 50 - 100 - 200 default: 200 - name: page in: query required: false description: Page number, computed as total hits divided by items_per_page. schema: type: integer - name: collection in: query required: false schema: type: string - name: title in: query required: false description: Restrict to a material title (資料名). schema: type: string - name: author in: query required: false schema: type: string - name: publisher in: query required: false schema: type: string - name: DOI in: query required: false schema: type: string - name: sort_by in: query required: false schema: type: string enum: - search_api_relevance - field_title - field_title_1 - field_year_facet - field_year_facet_1 - name: _format in: query required: false description: Response format. HTML when omitted. schema: type: string enum: - csv - json - bix responses: '200': description: Documented result set. Not observed — see 403. '403': description: What this endpoint actually returned on every probe on 2026-08-19. Apache-level block, 289-byte HTML body, content-type text/html; charset=iso-8859-1. content: text/html: schema: type: string 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.