# UTokyo Identity Federation (GakuNin SAML 2.0)

**Canonical:** https://apis.io/apis/university-of-tokyo/gakunin-identity-federation/  
**Provider:** University of Tokyo — https://apis.io/providers/university-of-tokyo/  
**Base URL:** https://gidp.adm.u-tokyo.ac.jp/idp/profile/SAML2/Redirect/SSO  
**Documentation:** https://www.gakunin.jp/

UTokyo Identity Federation (GakuNin SAML 2.0) is one of 5 APIs that [University of Tokyo](https://apis.io/providers/university-of-tokyo/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Identity Federation, SAML, Shibboleth, Single Sign-On, and GakuNin. The published artifact set on APIs.io includes authentication docs and API documentation.

The University of Tokyo operates three SAML 2.0 entities registered in GakuNin, Japan's academic access federation — two Shibboleth Identity Providers (the central UTokyo IdP at gidp.adm.u-tokyo.ac.jp, and a research-collaboration IdP for KAGRA run by the Institute for Cosmic Ray Research) and one Service Provider, the STEP10 course registration system. Their metadata is published continuously in the GakuNin aggregate, which is machine-readable SAML metadata and is the institution's largest genuinely-owned machine-readable artifact. It is also the closest thing to a registrar surface the university exposes: STEP10 is course registration, and it appears here as a federation entity rather than as an API.

## Machine-readable artifacts (4)

- **Authentication** — https://raw.githubusercontent.com/api-evangelist/university-of-tokyo/refs/heads/main/authentication/university-of-tokyo-authentication.yml
- **Examples** — https://raw.githubusercontent.com/api-evangelist/university-of-tokyo/refs/heads/main/examples/university-of-tokyo-gakunin-saml-metadata.xml
- **Conformance** — https://raw.githubusercontent.com/api-evangelist/university-of-tokyo/refs/heads/main/conformance/university-of-tokyo-conformance.yml
- **Documentation** — https://www.gakunin.jp/

## Other University of Tokyo APIs (4)

- [UTokyo Academic Assets Archives Portal API](https://apis.io/apis/university-of-tokyo/archives-portal/)
- [UTokyo IIIF Presentation and Image APIs](https://apis.io/apis/university-of-tokyo/iiif/)
- [UTokyo OAI-PMH Metadata Harvesting](https://apis.io/apis/university-of-tokyo/oai-pmh/)
- [UTokyo Repository Records API](https://apis.io/apis/university-of-tokyo/repository-records/)

## Tags

Identity Federation, SAML, Shibboleth, Single Sign-On, GakuNin, Research Infrastructure

---

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