Announcement of the Scheduled Changes to the Server Certificate and Security Settings of the Corporate Number Publication Site and Related Services (October 31)

September 30,2026
National Tax Agency, Japan

Regarding the configuration changes announced in "Announcement of Changes to the Server Certificate and Security Settings of the Corporate Number Publication Site (Scheduled for Late October)" will be implemented during the maintenance period specified below.


＜Maintenance Period＞
　Saturday, October 31, 2026, from 10:00 a.m. to 8:00 p.m. (Japan Standard Time).


＜Notes＞
　During the maintenance period, communication interruptions may occur, resulting in temporary errors.
　If an error occurs, please wait a while and then retry the operation.
　We appreciate your understanding and cooperation.