Central Government Coordination Office
Appears in 2 stories
Sets national disaster policy and operational guidelines for megaquake and tsunami scenarios
On December 8, 2025, a magnitude 7.6 offshore earthquake struck off Aomori Prefecture in the Sanriku region at 23:15 JST. It shook Hachinohe at a maximum 'upper 6' intensity and triggered tsunami warnings forecasting waves up to three meters for parts of Hokkaido, Aomori, and Iwate.
Updated May 10
Co-manages megaquake advisory messaging and coordination with prefectures and municipalities
Just before midnight on December 8, a magnitude-7.5 quake hit offshore near Aomori. It shook Hachinohe hard enough to topple furniture, cut power briefly, and send small tsunamis ashore, forcing about 90,000 people to evacuate from coastal towns.
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