# Crossref DOI Registration Membership

**Canonical:** https://apis.io/apis/tohoku/crossref-membership/  
**Provider:** Tohoku University — https://apis.io/providers/tohoku/  
**Base URL:** https://api.crossref.org/members/622  
**Documentation:** https://www.crossref.org/members/prep/622

Crossref DOI Registration Membership is one of 5 APIs that [Tohoku University](https://apis.io/providers/tohoku/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Crossref, DOI, Registry, Scholarly Publishing, and Persistent Identifiers.

Three Tohoku University units are Crossref members registering DOIs under their own prefixes, verified against api.crossref.org on 2026-09-01 — member 622 Tohoku University Medical Press (10.1620, 11,651 DOIs), member 1484 Mathematical Institute, Tohoku University (10.2748, 3,004 DOIs), member 2470 Graduate School of Information Sciences, Tohoku University (10.4036, 575 DOIs). This is a membership fact about the institution, not a contract it publishes; Crossref's own API is Crossref's and is not saved here.

## Machine-readable artifacts (1)

- **Conformance** — https://raw.githubusercontent.com/api-evangelist/tohoku/refs/heads/main/conformance/tohoku-conformance.yml

## Other Tohoku University APIs (4)

- [jMorp GraphQL API (Tohoku Medical Megabank Organization)](https://apis.io/apis/tohoku/jmorp-graphql/)
- [TOUR Institutional Repository OAI-PMH](https://apis.io/apis/tohoku/tour-oai-pmh/)
- [GakuNin Shibboleth Identity Provider](https://apis.io/apis/tohoku/gakunin-shibboleth-idp/)
- [ROR Organization Record](https://apis.io/apis/tohoku/ror-registration/)

## Tags

Crossref, DOI, Registry, Scholarly Publishing, Persistent Identifiers

---

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