by Kodosan
Hanko is Kodosan's centralized authentication service — one auth to rule them all.Named after the Japanese personal seal (判子) used to authenticate identity on documents,Hanko serves as the single source of truth for user authentication and identity acrossall Kodosan applications.
Single Sign-On
Authenticate once through Hanko and gain access to all Kodosan apps.
OAuth2 / OpenID Connect
Standard protocols so any Kodosan app can integrate securely using well-established libraries.
Your identity, centralized
Registration, login, password reset, email verification, and account settings — all in one place.
Hanko only stores what's necessary: your email, hashed password, and basic session data.We use essential cookies to keep you signed in — no tracking, no analytics, no third-party cookies.
When you authorize a Kodosan app, only the information you explicitly consent to is shared(typically your email and verification status).