A powerful earthquake shook southern Japan on Tuesday, July 28, 2026, sending tremors across the Kyushu region and prompting tsunami warnings along the coast.
What Happened
The earthquake struck southern Kumamoto Prefecture at 4:27 p.m. local time on July 28, 2026. According to the Japan Meteorological Agency, the quake registered magnitude 7.1, with the epicenter recording the highest possible reading on Japan’s seismic intensity scale — shindo 7. The U.S. Geological Survey measured it slightly lower, at magnitude 6.8, placing the epicenter about 5 kilometers east of Uto City.
The maximum intensity of 7 was recorded in Uki City and the town of Hikawa — a level at which people cannot remain standing, furniture is thrown into the air, and reinforced concrete structures can collapse. Nearby areas including Yatsushiro, Uto, Mashiki, Misato, and Kumamoto’s Minami Ward experienced a strong intensity of 6.
An aftershock reaching magnitude 5 hit the same area roughly 30 minutes after the main shock, and authorities have urged residents to stay alert for further large tremors.
Tsunami Warning and Damage
A tsunami warning for waves of about 1 meter was issued for the coastal areas of the Ariake and Yatsushiro seas, with officials urging residents in those areas to stay away from the coastline.
The quake knocked out power to thousands of homes and halted rail services across the region. NHK footage showed several collapsed buildings near the epicenter, and the fire department in Uki City reported a surge of emergency calls as multiple fires broke out across the city.
The Japanese government issued emergency earthquake warnings across seven prefectures on Kyushu island: Kumamoto, Nagasaki, Kagoshima, Fukuoka, Saga, Oita, and Miyazaki.
No Reported Issues at Nuclear or Industrial Sites
Kyushu Electric Power reported no irregularities at its Sendai and Genkai nuclear power stations following the earthquake. Chief Cabinet Secretary Minoru Kihara also confirmed that no abnormalities had been detected at any of the country’s nuclear facilities.
The region is also home to major manufacturing operations. Sony and TSMC — the world’s largest contract chipmaker — both operate plants in the affected area, with Sony confirming it was checking the situation.
Context: An Earthquake-Prone Region
Japan sits along the Pacific “Ring of Fire” and accounts for roughly 20% of the world’s magnitude 6.0-plus earthquakes, with tremors occurring somewhere in the country at least every five minutes. Kumamoto Prefecture has a history of destructive seismic activity, most notably the 2016 Kumamoto earthquakes, which killed dozens of people and displaced tens of thousands.
Authorities continue to monitor the region for aftershocks, and updates on casualties and structural damage are expected as assessment teams reach the hardest-hit areas.
This is a developing story. Details including casualty figures and the full extent of damage may change as more information becomes available.
