This page will be updated from time to time.

Wednesday, 16, October, 2024, 19:00-23:00 (JST)
The "TREE" may be temporarily unavailable due to maintenance.

[September 24, 2024: Restored]
As of September 22, 2024
UTokyo OPAC is experiencing access problems. If you encounter a privacy error screen when accessing UTokyo OPAC via your browser, please follow the steps below to display the screen:
1. When you see a message such as “Your connection is not private” or “This connection is not secure,” click on “Advanced” within the screen.
2. Click on “Proceed to opac.dl.itc.u-tokyo.ac.jp (unsafe).”

[September 19, 2024: Restored]
As of September 18, 2024
UTokyo Repository is experiencing access problems.
You may be able to access the site, but the page is very slow to be displayed. Please wait while the page is loading (the blue circle on the upper left and the blue bar at the top).
If the screen does not appear, please reload your browser.

[July 22, 2024: Restored]
As of July 19, 2024
E-journal & E-book Portal and UTokyo Article Link are not available. Access to content via UTokyo Article Link from database search results is also unavailable.

→We have not been able to confirm that the EJ & EB Portal and UTokyo Article Link have been restored, but it appears that they are now accessible. You may continue to use those that are still accessible, but please be aware that there is a possibility that issues may occur again.

[July 9, 2024: Restored]
As of July 5, 2024
Some materials in the OPAC are not showing up in the search results. Please try CiNii Books (https://ci.nii.ac.jp/books/) just to be sure. If you cannot reserve books from MyOPAC due to this problem, please go to the counter.

[July 3, 2024: Restored]
As of July 2, 2024
There is a problem that the papers in 2024 of Nature platform cannot be browsed (both on and off-campus). Papers published before 2023 and SpringerLINK e-journals and e-books are available.

Sunday, September 22, 2024 9:00 - 17:00 (JST) *Start time has been changed from 13:00 to 9:00. (Changed on 9/19)
Online resources and services will be unavailable due to a planned power outage in Hongo Campus and UTNET maintenance as below. 
Services:
　 UTokyo OPAC (Including ASK and MyOPAC services)
　 UTokyo Digital Archive Portal (Image display only not available)
 　The University of Tokyo Doctorial Dissertation Database
 　Database of the Tibetan Tripitaka Card Catalog
 　Catalog of Classical Chinese Books in the General Library of the University of Tokyo
 　Kanze Archive

Sunday, September 22, 2024, 16:00-18:00 (JST)
E-journal & E-book Portal and UTokyo Article Link will be suspended for maintenance. Access to content via UTokyo Article Link from database search results will also be unavailable.

Thursday, September 19, 2024 22:30 - Saturday, September 21, 2024 6:00
The "Web of Science" will undergo scheduled maintenance. Access may be intermittent during this time.

Thursday, September 19, 2024, 10:00 - 12:00
All services of UTokyo Repository inluding searching and browsing will be unavailable.

The "UTokyo Repository" will be suspended from 18:00 Friday, September 13, 2024 to 10:00 Tuesday, September 17, 2024 (JST).

Monday, September 16, 2024, 7:00-10:00 (JST)
KinoDen" and "bREADER Cloud" will be inaccessible for maintenance.

August 21 (Wed.),2024 9:00-9:30 (JST)
August 22 (Thu.),2024 9:00-9:30 (JST)
Due to server maintenance, OPAC service (incl. MyOPAC and ASK services) will be stopped.
※Even if a connection is established during this time, it may stop accessing the site.

Saturday, August 17, 2024 20:00 - Sunday, August 18, 2024 0:00 (JST)
IEEE Xplore will undergo scheduled maintenance. During this time, there will be periods when the website will be unavailable.

Sunday, July 21, 2024, 16:00-18:00 (JST)
E-journal & E-book Portal and UTokyo Article Link will be suspended for maintenance. Access to content via UTokyo Article Link from database search results will also be unavailable.