Network Outage due to Emergency Maintenance of Core Network Equipment (Oct. - Feb.)
We will be performing emergency maintenance on the university's core (BB) network equipment as follows.
During the work, communication will be affected on the designated campuses.
Affected Areas and Impact
The affected period is a tentative schedule and may change depending on the work content.
(1) Shiba-Kyoritsu Campus
Period: October 19, 2025 (Sunday) 4:30 p.m. - 6:00 p.m.
Scope: Shiba-Kyoritsu Campus
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period (scheduled for around 5:00 p.m.)
Notes:
Scope: Shiba-Kyoritsu Campus
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period (scheduled for around 5:00 p.m.)
Notes:
- Scheduled power outages for Shiba-Kyoritsu Campus due to electrical facility safety inspections are planned on the same day. Please check the campus notices for details.
(2) Mita Campus
Period: December 21, 2025 (Sunday) 8:00 a.m. - noon
Scope: Mita Campus
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period
Notes:
Scope: Mita Campus
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period
Notes:
- Scheduled power outages for Mita Campus due to electrical facility safety inspections are planned on the same day. Please check the campus notices for details.
- In conjunction with the Mita area outage, business systems (ADST) services across all areas may be temporarily suspended.
(3) Hiyoshi Campus
Period: December 21, 2025 (Sunday) 8:00 a.m. - noon
Scope: Hiyoshi Campus (including satellites like the Nishi Annex)
Scope: Hiyoshi Campus (including satellites like the Nishi Annex)
- Organizations using SINET L2VPN via Hiyoshi
- Osaka City Campus (KOCC)
- Tsuruoka Town Campus (TTCK)
- (Kanagawa Area) Wireless WiFi connections via eduroam
- (All areas) Use of certificate issuance services at convenience stores
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period
Notes:
Details: One outage of approximately 30 minutes during the above period
Notes:
- Scheduled power outages for Hiyoshi Campus due to electrical facility safety inspections are planned on the same day. Please check the campus notices for details.
- In conjunction with the Hiyoshi area outage, business systems (ADST) services in the Kanagawa area may be temporarily suspended.
(4) Shonan Fujisawa Campus
Period: December 21, 2025 (Sunday) 8:00 a.m. - noon
Scope: Shonan Fujisawa Campus (including the Faculty of Nursing and Medical Care building and the Shonan Fujisawa Junior and Senior High School)
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period
Notes:
Scope: Shonan Fujisawa Campus (including the Faculty of Nursing and Medical Care building and the Shonan Fujisawa Junior and Senior High School)
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period
Notes:
- Scheduled power outages for Shonan Fujisawa Campus due to electrical facility safety inspections are planned on the same day. Please check the campus notices for details.
- Communication within SFC (133.27/16, 2001:df2:c900::/48) and with outside networks is possible. Communication to within the university (131.113/16, 2001:df0:eb::/48) will not be possible.
- There is a possibility of a separate outage due to maintenance work on the SFC-CNS side.
(5) Yagami Campus
Period: December 21, 2025 (Sunday) 8:00 a.m. - noon
Scope: Yagami Campus
Scope: Yagami Campus
- Shin-Kawasaki Town Campus
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period
Details: One outage of approximately 30 minutes during the above period
(6) Shinanomachi Campus
Period: February 22, 2026 (Sunday) 8:00 a.m. - 10:00 a.m.
Scope: Shinanomachi Campus (including Azabudai Area)
Scope: Shinanomachi Campus (including Azabudai Area)
- Organizations using SINET L2VPN via Shinanomachi
- Tonomachi Town Campus
- (Tokyo Area) Wireless WiFi connections via eduroam
Content: Core network equipment maintenance outage
Details: One outage of approximately 30 minutes during the above period (scheduled for around 9:00 a.m.)
Notes:
Details: One outage of approximately 30 minutes during the above period (scheduled for around 9:00 a.m.)
Notes:
- Scheduled power outages for a part of Shinanomachi Campus due to electrical facility safety inspections are planned on the same day. Please check the campus notices for details.
- In conjunction with the Shinanomachi area outage, services for the Health Center and the Research Fund Management System (Dr.Budget) may be temporarily suspended.
We apologize for the inconvenience this may cause and appreciate your understanding and cooperation.
Last-Modified: October 1, 2025
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