Notices

Information for System Failure

2023

Feb.7
Tokyo Tech Portal
  • Date of system failure occurred: February 7, around 20:00 - around 21:30, 2023

It was unable to access Tokyo Tech Portal and some systems via Tokyo Tech Portal. They have recovered at around 21:30.
We sincerely apologize for your inconvenience.

Jan.19
Tokyo Tech Portal
  • Date of system failure occurred: January 19, around 9:45 - around 10:15, 2023

It was unable to access some systems via Tokyo Tech Portal. They have recovered at around 10:15.
We sincerely apologize for your inconvenience.

2022

Sep.29
Tokyo Tech Portal
  • Date of system failure occurred: September 29, around 2:30 - around 10:30, 2022

Some useres were not available to log in to the Tokyo Tech Portal. The system has recovered at around 10:30.
We sincerely apologize for your inconvenience.

July 6
Tokyo Tech Portal
  • Date of system failure occurred: July 1 - 6, 2022

There were some delivery delay of Login Notice about IC card auth. They have recovered at around 13:00.
Login Notice delivered delay due to this failure were delivered. We sincerely apologize for your inconvenience.

2021

July 12
Tokyo Tech Portal
  • Date of system failure occurred: 7:00 - 22:00, July 12, 2021

We recognized that it was unavailable to connect to both of IC card Authentication and Matrix Authentication.
We have recovered both of them at around 22:00.
We sincerely apologize for your inconvenience.

Apr.2
Tokyo Tech Mail
  • Date of system failure occurred: 8:35 - 9:40, April 2, 2021

Tokyo Tech Mail had some delivery trouble due to System failure for campus network.
Tokyo Tech Mail recovered at around 9:40.
We sincerely apologize for your inconvenience.

2020

Nov. 20
Tokyo Tech Portal/Tokyo Tech Mail
  • Date of system failure occurred: 1:35 - 4:15, November 20, 2020

There was a network system failure from 1:35. We recovered the service at around 4:15.
We sincerely apologize for your inconvenience.

Nov. 4
Tokyo Tech Portal
  • Date of system failure occurred: 7:00 - 9:55, November 4, 2020

We recognized that it was hardly to connect to both of IC card Authentication and Matrix Authentication.
We have recovered both of them at around 9:55.
We sincerely apologize for your inconvenience.

Sep. 2
Tokyo Tech Portal/Tokyo Tech Mail
  • Date of system failure occurred: 3:30 - 4:20, September 2, 2020

There was a network system failure from 3:30. We have recovered the service at around 4:20.
We sincerely apologize for your inconvenience.

June 26
Tokyo Tech Portal
  • Date of system failure occurred: 8:30 - 10:00, June 26, 2020

We recognized that it was hardly to connect to both of IC card Authentication and Matrix Authentication.
We have recovered both of them at around 10:00.
We sincerely apologize for your inconvenience.

June 15
Tokyo Tech Mail
  • Date of system failure occurred: 8:15 - 9:50, June 15, 2020

Some e-mails were delayed to deliver from 8:15 a.m. to 8:35a.m. this morning.
We have recovered the service at around 9:50 a.m.
We sincerely apologize for your inconvenience.

May 14
Tokyo Tech Portal
  • Date of system failure occurred: 13:30 - 15:00, May 14, 2020

We recognized that it was hardly to connect to both of IC card Authentication and Matrix Authentication.
We have recovered both of them at around 15:00.
We sincerely apologize for your inconvenience.

2019

Dec. 11
Fault in the Building Access System
  • Date of system failure occurred：Morning, December 11, 2019

There was a fault in the Building Access System that arises from replacing the server system and some buildings were not opened. Now the system has been recovered completely.
We sincerely apologize for your inconvenience.

May 21
Tokyo Tech Portal
  • Date of system failure occurred：9:15 - 11:30, May 21, 2019

We recognized that it was hardly to connect to both of IC card Authentication and Matrix Authentication. We have recovered both of them at around 11:30.
We sincerely apologize for your inconvenience.

2018

June 27
Tokyo Tech Portal
  • Date of system failure occurred：13:00 - 14:30, June 27, 2018

We recognized that it was hardly to connect to both of IC Card Authentication and Matrix Authentication. We have recovered both of them at around 14:30.
We sincerely apologize for your inconvenience.

2017

Oct. 14
Tokyo Tech Mail
  • Date of system failure occurred：October 14, 2017

Delivery of some e-mails were delayed because of server failure. We have recovered the system at around 19:15.
We apologize for the inconvenience.

Sept. 14
System failures for Tokyo Tech Portal and Tokyo Tech Mail
  • Date of system failure occurred : September 14 13:30 - 15 11:00, 2017

Authentication settings’ failure caused disconnection to Tokyo Tech Portal and Tokyo Tech Mail for a while.
We have tentatively recovered the mail system by returning to the old mail system, which will be used until 14:00 September 22.
We are truly sorry for your inconvenience.

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Created by: The Authentication Infrastructure System Team

Tokyo Institute of Technology Portal > Notices > Information for System Failure