SINET Network Maintenance Information

Due to the maintenance of SINET6, there will be an impact on Keio's network traffic as follows.
We apologize for any inconvenience this may cause, and ask for your understanding and cooperation.

Impacts

(1) from 0:00 a.m. to 2:00 a.m. on Monday, May 19, 2025

Tsuruoka Town Campus (TTCK)

During the above time, there is a possibility of unstable communication. (*)

For the following, communication breakdowns of up to two 15-minute periods will occur within the above time frame.

- WiFi access (keiomobile2, keiomobile3, eduroam)

(2) from 2:00 a.m. to 5:00 a.m. on Monday, May 19, 2025

All Campuses

During the above time, there is a possibility of unstable communication on all campuses several times. (*)

For the following, communication breakdowns of up to two 15-minute periods will occur within the above time frame.

- Tonomachi Town Campus

- WiFi access (eduroam) on Mita Campus

(3) from 2:00 a.m. to 5:00 a.m. on Saturday, May 31, 2025

Osaka City Campus (KOCC)

During the above time, there will be a communication interruptions of up to two 15-minute periods.

(4) from 3:00 a.m. to 6:00 a.m. on Monday, June 9, 2025

All Campuses

During the above time, there is a possibility of unstable communication across all campuses several times. (*)

For the following, communication breakdowns of up to two 15-minute periods will occur within the above time frame.

- WiFi access (eduroam) on all Campuses (except Mita Campus)

- Tonomachi Town Campus

- Tsuruoka Town Campus (TTCK)

- Osaka City Campus (KOCC)

- Use of Certificate Issuance Service at convenience stores

(*) Side effects of network instability

- Slow response when browsing web pages, websites, etc.

- Interruption or sudden drop in video or sound quality during remote conferencing (Zoom etc.)