Recent Updates
[Notice] System maintenance on June 10
We will be performing a system reboot for maintenance on Wednesday, June 10, from 3:00 PM to 5:00 PM...
Jun 2, 2026
Special page of Southern Tokachi Earthquake of April 27, 2026 is posted.
Special page of Southern Tokachi Earthquake of April 27, 2026 is posted....
May 7, 2026
Special page of off the coast of Sanriku Earthquake of April 20, 2026 is posted.
Special page of off the coast of Sanriku Earthquake of April 20, 2026 is posted....
Apr 21, 2026
[Notice] System maintenance on March 25
On Wednesday, March 25, during 5:30 PM and 10:30 PM, the restart of the IISEE web server is schedule...
Mar 19, 2026
Special page of Eastern Shimane Prefecture Earthquake of January 6, 2026 is posted
Special page of Eastern Shimane Prefecture Earthquake of January 6, 2026 is posted....
Jan 8, 2026
Special page of off the eastern coast of Aomori Prefecture Earthquake of December 8, 2025 is posted
Special page of off the eastern coast of Aomori Prefecture Earthquake of December 8, 2025 is posted...
Dec 9, 2025