Japan — Japan Meteorological Agency & Japan — Nuclear Regulation Authority

Japan — Japan Meteorological Agency: Japan — Japan Meteorological Agency reported the earthquake's magnitude, issued tsunami alerts and advisories, and cautioned about possible aftershocks and increased risk of a megaquake.

Japan — Nuclear Regulation Authority: Japan — Nuclear Regulation Authority reported a water spill at the Rokkasho fuel reprocessing plant but confirmed no safety concerns.

Japan — Japan Meteorological Agency: The Japan — Japan Meteorological Agency issued warnings and advisories for the earthquakes and tsunamis, upgrading magnitudes and cautioning about potential future seismic activity, including a 'megaquake' along the Nankai Trough.

Japan — Nuclear Regulation Authority: The Japan — Nuclear Regulation Authority reported no immediate signs of abnormalities at nuclear facilities in the affected region following the earthquakes.

Japan — Japan Meteorological Agency: The Japan — Japan Meteorological Agency measured the tsunami waves, lifted advisories, and cautioned about potential aftershocks and increased risk of future quakes along Japan's northeastern coast.

Japan — Nuclear Regulation Authority: The Japan — Nuclear Regulation Authority reported a water spill at the Rokkasho fuel reprocessing plant but confirmed no safety concerns and no abnormalities at other nuclear facilities in Japan.

Japan — Japan Meteorological Agency: Japan — Japan Meteorological Agency issued tsunami warnings and advisories, detected tsunami waves, and cautioned about potential aftershocks, playing a crucial role in public safety and information dissemination.

Japan — Nuclear Regulation Authority: The Japan — Nuclear Regulation Authority confirmed that nuclear power plants and related facilities in the region were intact and reported no abnormalities.