# Keio University Identity Provider (GakuNin / eduGAIN)

**Canonical:** https://apis.io/apis/keio/gakunin-idp/  
**Provider:** Keio University — https://apis.io/providers/keio/  
**Base URL:** https://metadata.gakunin.nii.ac.jp/gakunin-metadata.xml  
**Documentation:** https://www.gakunin.jp/en

Keio University Identity Provider (GakuNin / eduGAIN) is one of 9 APIs that [Keio University](https://apis.io/providers/keio/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Identity Federation, Shibboleth, SAML, eduGAIN, and GakuNin. The published artifact set on APIs.io includes API documentation.

Keio operates its own SAML 2.0 identity provider under entityID https://gakunin1.keio.ac.jp/idp/shibboleth, registered in GakuNin — the Japanese academic access-management federation operated by the National Institute of Informatics — since 2014-02-24, and republished into eduGAIN as entity 853677. The metadata asserts scope keio.ac.jp, bilingual display names, discovery hints covering the 131.113.0.0/16 and 133.27.0.0/16 networks and the keio.ac.jp and keio.jp domains, and a technical contact at Keio's Information Technology Center. Identity federation is the surface class a university operates by definition and is almost never catalogued for; for Keio it is the strongest artifact carrying the institution's own name. The entityID and the scope are Keio's; the SSO endpoints resolve to keio.ex-tic.com, a Keio tenant on the Extic identity platform, which is recorded as a tenancy rather than deducted from the institution's ownership of the entity.

## Machine-readable artifacts (3)

- **IdentityFederation** — https://raw.githubusercontent.com/api-evangelist/keio/refs/heads/main/identity-federation/keio-identity-federation.yml
- **Documentation** — https://technical.edugain.org/entities
- **Conformance** — https://raw.githubusercontent.com/api-evangelist/keio/refs/heads/main/conformance/keio-conformance.yml

## Other Keio University APIs (8)

- [KOARA OAI-PMH Metadata API](https://apis.io/apis/keio/koara-oai-pmh/)
- [Keio Media Center Digital Collections IIIF API](https://apis.io/apis/keio/iiif/)
- [Keio Okta Tenant — OpenID Connect](https://apis.io/apis/keio/okta/)
- [K-RIS — Keio Research Information System (Elsevier Pure)](https://apis.io/apis/keio/k-ris/)
- [Keio Figshare Research Data Repository](https://apis.io/apis/keio/figshare/)
- [DataCite Membership — provider `keio`](https://apis.io/apis/keio/datacite/)
- [Crossref Memberships — Keio units](https://apis.io/apis/keio/crossref/)
- [ROR Registration — Keio University](https://apis.io/apis/keio/ror/)

## Tags

Identity Federation, Shibboleth, SAML, eduGAIN, GakuNin, Single Sign-On

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/keio/gakunin-idp/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/keio/.