A magnitude-7.1 earthquake struck Japan's Kumamoto prefecture at 4:35pm local time on Tuesday, triggering a shopping centre collapse that left multiple people presumed dead and exposing the region's critical infrastructure to severe testing. The tremor hit just south of the town of Uki, near the prefecture's capital city, followed by 26 aftershocks before a second magnitude-6.1 quake struck at 5:12pm.
Police said "quite a few" people were presumed dead after the Aeon Mall shopping centre's second floor collapsed, broadcaster TBS reported. Between 20 and 30 workers trapped at the mall couldn't be reached, according to broadcaster NHK. The complex had about 200 shops and businesses inside and had only recently reopened after it was badly damaged in the magnitude 7.3 Kumamoto earthquake in April 2016.
Rescue Operations and Infrastructure Damage
A major rescue operation was underway at the shopping centre, where "many people" were trapped following an explosion of unclear origin. An Aeon spokesperson said customers and employees were evacuated right after the initial quake. Kazuya Tsurunaga, who was 300 metres from the mall, told TBS he heard the explosion while cleaning up broken dishes. "It was a huge impact," he said. "A large cloud of smoke billowed up, and because the wind happened to be blowing and the wind direction was towards the shop, the area around us was in a state like volcanic ash was falling."
Multiple people were also unaccounted for after a chimney collapsed at a Nippon Paper Industries factory, NHK reported. The tremor caused power outages for at least 48,000 households in Kumamoto prefecture and fires broke out in several locations. NHK reported that police were seeking the whereabouts of nine people and that a train was derailed during the earthquake.
Nuclear Safety Confirmed
Kyushu Electric Power said there were no reports of irregularities at its Sendai and Genkai nuclear power stations after the earthquake. Japan's Nuclear Regulation Authority said no abnormalities were found at three nearby nuclear power plants. The UN nuclear watchdog said Japan's nuclear regulation authority had informed it that there was no damage or safety issues at the Sendai nuclear power plant, and said the IAEA would continue to monitor the situation.
Seismology authorities from Geoscience Australia and the United States Geological Survey reported the initial quake struck at a depth of 10 kilometres below the sea's surface. A tsunami warning for a wave measuring 1 metre was issued after the earthquake and lifted about two hours later. Japan's Meteorological Agency recorded at least 75 additional quakes in Kumamoto prefecture, which could remain a concern for about a week after the initial earthquake.
Government Response
Prime Minister Sanae Takaichi said human casualties, building collapses, road damage and fires had been confirmed so far. She said local fire stations were responding and urged people to stay away from the coast. She also said an Emergency Assembly Team meeting was called in the Countermeasures Room to assess the quake and that an investigation team was dispatched from the government cabinet office.
The Japanese government issued emergency earthquake warnings for Kumamoto, Nagasaki, Kagoshima, Fukuoka, Saga, Oita and Miyazaki prefectures, all on Japan's southern Kyushu island. Takaichi released a statement on X urging local government ministries and emergency response agencies to immediately assess damage and prioritize rescue of residents.
Transportation Disruptions
Train operator JR Kyushu suspended services, including its high-speed Shinkansen trains, following the quake. Kumamoto airport shut its runway as airlines diverted and cancelled flights, with the airport planning to resume normal operations on Wednesday.
Japan is one of the world's most earthquake-prone countries, with a tremor occurring at least every five minutes. Located along the Ring of Fire, Japan accounts for about 20 per cent of the world's earthquakes of magnitude-6 or more. Kumamoto was hit with a deadly quake in 2016 that left more than 50 people dead, 1,800 injured and tens of thousands of homes damaged or destroyed.
Why This Matters:
The earthquake's immediate confirmation of nuclear safety demonstrates the effectiveness of Japan's post-Fukushima infrastructure investments, a critical validation for the nation's energy security strategy. With 48,000 households without power and major transportation networks suspended, the economic costs will mount quickly in one of Japan's manufacturing regions. The Nippon Paper Industries factory collapse and Aeon Mall disaster highlight ongoing vulnerabilities in commercial infrastructure despite building code improvements following the 2016 disaster. Japan's position along the Ring of Fire—accounting for 20 per cent of the world's magnitude-6 or greater earthquakes—underscores the permanent fiscal burden of maintaining resilient infrastructure and emergency response capabilities. The government's rapid deployment of investigation teams and coordination across seven prefectures shows institutional preparedness, but the week-long aftershock warning suggests prolonged disruption to commerce and daily life in a critical economic region.