# Nagoya University Shibboleth Identity Provider (GakuNin)

**Canonical:** https://apis.io/apis/nagoya/identity-federation/  
**Provider:** Nagoya University — https://apis.io/providers/nagoya/  
**Base URL:** https://shib.nagoya-u.ac.jp/idp/profile/SAML2/Redirect/SSO  
**Documentation:** https://icts.nagoya-u.ac.jp/ja/services/gakunin/

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

Institution-operated Shibboleth SAML 2.0 identity provider on the university's own host, published as machine-readable metadata in the GakuNin (学術認証フェデレーション) aggregate. EntityDescriptor ID PI0136JP, entityID https://shib.nagoya-u.ac.jp/idp/shibboleth, shibmd:Scope nagoya-u.ac.jp, mdui:DisplayName "Nagoya University" / "名古屋大学", keywords category:location:chubu and category:organizationType:university, registered with registrationAuthority https://www.gakunin.jp on 2014-04-30. It carries both IDPSSODescriptor and AttributeAuthorityDescriptor roles and three SingleSignOnService endpoints — /idp/profile/Shibboleth/SSO, /idp/profile/SAML2/POST/SSO and /idp/profile/SAML2/Redirect/SSO. The signing certificate is issued by NII Open Domain CA - G8 RSA to CN=shib.nagoya-u.ac.jp, O=Nagoya University. Verified 2026-09-01 by fetching the 5.65 MB GakuNin aggregate and parsing all 650 EntityDescriptors: exactly one is Nagoya's, and no Nagoya-operated service providers are registered. Negative finding worth recording: the eduGAIN technical entity list carries 173 GakuNin entities and none of them is Nagoya's, so this IdP is federated nationally but not exported to eduGAIN. This is a real, machine-readable, institution-run surface and it is the class of university API that is almost never catalogued.

## Machine-readable artifacts (4)

- **Documentation** — https://icts.nagoya-u.ac.jp/ja/services/gakunin/
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/nagoya/refs/heads/main/authentication/nagoya-authentication.yml
- **Conformance** — https://raw.githubusercontent.com/api-evangelist/nagoya/refs/heads/main/conformance/nagoya-conformance.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/nagoya/refs/heads/main/apis.yml

## Other Nagoya University APIs (4)

- [ERG Science Center data archive (ISEE, Nagoya University)](https://apis.io/apis/nagoya/ergsc-data-archive/)
- [NAGOYA Repository OAI-PMH (NII WEKO3 / JAIRO Cloud tenant)](https://apis.io/apis/nagoya/repo-oai/)
- [ROR registration — Nagoya University](https://apis.io/apis/nagoya/ror-registration/)
- [GakuNin academic access management federation membership](https://apis.io/apis/nagoya/gakunin-federation/)

## Tags

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

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