[Important] Temporary Service Suspension Due to Maintenance on the School’s Internal System Infrastructure and Network Equipment (September 13)

As detailed below, we will be performing maintenance on the network equipment within the school’s system infrastructure.

Due to this maintenance, there may be periods during which some systems and services running on the school’s system infrastructure may be difficult to access or unavailable.
We apologize for any inconvenience this may cause and appreciate your understanding as we work to ensure stable service.

Maintenance Date and Time

• September 13, 2026 (Sun), 3:00 a.m. – 6:00 a.m. (scheduled)

- The end time may vary depending on the progress of the work.
- Early morning on September 14 (Mon) has been designated as a backup date.

Work Details

Maintenance of network equipment within the school’s system infrastructure

Scope of Impact

During this period, some systems and services running on the university’s system infrastructure may experience temporary connection interruptions, communication delays, or service outages.
The main services that may be affected are as follows:

• Systems related to keio.jp authentication
• Systems using virtualization servers provided by KIC

In particular, if you attempt to log in or perform any authentication-related operations during the maintenance period, the process may not complete successfully.
We apologize for any inconvenience and ask that you avoid using these services during the maintenance period.

Request to Users

During the maintenance period, please refrain from logging in to the affected services, submitting applications, updating registration information, or performing similar operations.
If you are still unable to connect after the maintenance is complete, please try refreshing your browser, waiting a short while and trying again, or restarting your device.

Notes

We will announce the completion of the maintenance via this news update.