There is a possibility that the UTokyo OPAC/MyOPAC may be temporarily malfunctioning during the system maintenance as follows.
We apologize for the inconvenience and thank you for your understanding.

Date: Wednesday, August 5, 2020, 9:00 a.m. to 12:00 p.m. (tentative)

If the UTokyo OPAC collection search is temporarily down, please use TREE(UTokyoREsourceExplorer).
You can also search the collection here.
Please refrain from using MyOPAC during the system maintenance as much as possible. There is a possibility that the operation is unstable.