As of Monday, February 2, 2026, we are currently experiencing system issues with the Shared Repository Service, including the Tsukuba Repository.

Depending on the timing of your access, you may encounter the following issues:

"503 Service Temporarily Unavailable" error message

The system developer is currently working urgently to resolve the issue. We ask for your patience until the service is fully restored. We will post an update on this page as soon as the system is back online.

We sincerely apologize for any inconvenience this may cause to our users.