Release of the Automatic Protection Feature for keio.jp Account Passwords

If you sign in with a password that has been leaked to keio.jp, you will be directed to a screen for a mandatory reset and re-etup. This feature is scheduled to be applied sequentially starting on Tuesday, September 30, 2025.

Error message: password has expired
The actual screen will appear as shown here.

Reference Page / Useful Links

• Release Notes
  [Action as Needed]2025/09/29Release of the Automatic Protection Feature for keio.jp Account Passwords
• Okta Help Center
  https://support.okta.com/help/s/article/breached-credentials-protection-product-enhancement?language=en_US