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System failure due to a fault in the UPS equipment [Solved]

System Status


Updated: March 06, 2018
March 06, 2018

Updated at 9:24 on March 7


Updated at 8:55 on March 7

Sending and receiving emails while service was stopped

If there are some emails that have not been sent, please try to send those again.


The UPS has been fully restored at 21:32 on March 6. The suspension of the services due to the sudden power failure has also been restored. Some of the services may take longer than usual to respond. However, they will be recovered over time. In addition, there is a possibility that the failure has occurred in some users of MailHosting or ECCS Staff Email. We will restore it as soon as it is confirmed. If you notice issues, please contact us.

We deeply apologize to all users for causing any inconveniences over a long period.


The UPS has temporally restored around 14:10 on Tuesday, March 6. However, we are currently investigating on the influence caused by the sudden power failure.

We will keep you informed about the required time for investigating the issue and restoring the system on this website as soon as an estimated time can be confirmed.

We deeply apologize to all users for causing any inconveniences over a long period.


As of 13:00 on Tuesday, March 6, we have been added unavailable system and services on the following list.


Large scale system failure due to a fault in the UPS (Uninterruptible Power Supply) equipment has occurred around 2 am on Tuesday, March 6, 2018.
ECCS Staff Email (domain name: mail.ecc.u-tokyo.ac.jp) and MailHosting service (mh.itc.u-tokyo.ac.jp) (domain name varies by organization) have been unable to send/receive emails from the above mentioned date and time.

We are afraid that system restoration will take a long time to restore the system.

We deeply apologize to all users for any inconvenience this may have caused.


As of 7:30 am on Tuesday, March 6, 2018, system failure due to a fault in the UPS equipment has been occurred.

Unavailable system

We apologize to all users for any inconvenience that this may cause.
We will update this notification as soon as we have made progress on this issue.