TOKYO — A powerful Japan earthquake off the coast of Aomori Prefecture struck late Monday, injuring dozens of people and forcing about 90,000 to evacuate coastal towns as sub-meter tsunami waves reached the country’s northeast shoreline. According to Reuters, the magnitude 7.5 quake prompted urgent tsunami warnings for Hokkaido, Aomori, and Iwate before the Japan Meteorological Agency lifted them early Tuesday after observing small surges, Dec. 9, 2025.
Prime Minister Sanae Takaichi said at least 30 people were injured, most by falling furniture or glass, and one fire was reported in Aomori after the shock shook northern Japan. “We are putting people’s lives first and doing everything we can,” she told reporters as authorities halted bullet trains, inspected infrastructure, and said no significant structural damage or fatalities had been reported.
Japan earthquake triggers rare megaquake advisory.
The Japan earthquake did not cause catastrophic damage. Still, it immediately triggered Japan’s first “Hokkaido/Sanriku Offshore Earthquake Warning”, a megaquake advisory signaling a temporarily higher risk of a larger quake along the Japan Trench. Coverage in Japan Forward and guidance from the Japan Meteorological Agency say the alert lifts the estimated chance of a magnitude 8-class event in the region from about 0.1 percent in a typical week to roughly 1 percent and urges residents to review evacuation plans and supplies.
Data from the Japan Meteorological Agency’s earthquake portal show the main shock striking at 11:15 p.m. local time about 80 kilometers off the east coast of Aomori at a depth of roughly 50 kilometers. The agency now lists the quake as magnitude 7.5, revised from an initial 7.6, and tsunami gauges along the Pacific coast measured waves of about 20 to 70 centimeters before all warnings and advisories were lifted around daybreak.
The Japan earthquake also disrupted daily life across northern Honshu. Bullet trains on the Tohoku Shinkansen and several local rail services were suspended, about 800 homes temporarily lost power, and a nuclear fuel facility in Rokkasho reported a small water spill with no safety threat, according to an Associated Press summary. Dozens of aftershocks, including jolts above magnitude 6, rattled the region as crews checked bridges, seawalls, and older buildings.
Live coverage of the Japan earthquake, including a rolling blog from The Independent, highlighted officials’ reminders that the megaquake warning is not a prediction but a cautionary notice amid ongoing aftershocks. Local authorities kept shelters open and urged residents in low-lying coastal areas to stay ready to move quickly if new tsunami alerts accompany strong tremors.
Officials and experts framed the latest Japan earthquake against a more extended history of major seismic shocks. Government documents on the 2011 Great East Japan Earthquake and encyclopedic accounts of the 2011 Japan earthquake and tsunami say the magnitude 9.0 event and its tsunami left about 18,500 people dead or missing and triggered the Fukushima Daiichi nuclear crisis, while a U.S. Geological Survey summary of the Jan. 1, 2024, Noto Peninsula quake describes that separate magnitude 7.5 shock as killing hundreds and destroying many homes on Japan’s west coast.
Seismologists say the current Japan earthquake is far less severe than the 2011 catastrophe but fits a pattern of large offshore ruptures where the Pacific Plate dives beneath northern Honshu. For now, officials are urging residents across Hokkaido and Tohoku to secure heavy furniture, stay alert for strong aftershocks, and be ready to move to higher ground if new tsunami warnings accompany future major tremors.
