The Tsukuba Repository will temporarily suspend its services during the following period for a major update following a version upgrade of the shared platform.

[Service Suspension Period] Monday, March 16 – Wednesday, March 18, 2026

During the above period, all services including searching and browsing will be unavailable, and a maintenance screen will be displayed.
We apologize for any inconvenience this may cause and appreciate your understanding in advance.

Once the developer announces the resumption of service, we will notify you here.

Accordingly, the registration of content will be suspended during the following period.
Requests for registration received during this time will be processed sequentially from Monday, March 23.

[Content Registration Suspension Period] Thursday, March 12 – Thursday, March 19, 2026

If you wish to search for content during the service suspension, please use the following external databases.
Please note that while the full-text files cannot be viewed, you can check the metadata (bibliographic information) and whether the content is registered in the Tsukuba Repository. (Information may not be up to date.)

CiNii Research: https://cir.nii.ac.jp/
Note: In the Advanced Search, switch to "Articles," "Dissertations," or "Data," and specify "IRDB" as the Data Source.

IRDB (Institutional Repositories DataBase): https://irdb.nii.ac.jp/
Note: In the Advanced Search, specify "University of Tsukuba" in the Institution field.

National Diet Library Digital Collections (Doctoral Dissertations): https://dl.ndl.go.jp/
Note: In the Advanced Search, specify "University of Tsukuba" as the Publisher and "Doctoral Dissertations" as the Collection.