Southern sea trench and megathrust fault, Japan’s seismic and energy frontier
A magnitude 5.8–5.9 earthquake struck southern Ibaraki and rattled Tokyo, injuring dozens across five prefectures. Trains faced delays; Shinkansen service remains normal. Authorities set up a task force to assess damage as residents brace for possible aftershocks.
Japan’s Earthquake Research Committee has updated risk projections for the Kinki region, including Osaka and Kobe, citing a 50–60% chance of a magnitude 6.8+ quake over the forecast period. The assessment, based on 45 active faults, places Kinki’s risk on par with Tokyo’s region, amid broader concerns about a Nankai Trough megathrust event that could devastate coastal areas.
The operator has withdrawn its safety screening for the Hamaoka No. 3 and 4 reactors, citing serious problems in corporate culture and governance. Public trust has become the priority as the company plans to reapply after implementing reforms; leaders will step down while a new president takes over.
Japan has established the National Disaster Management Agency to coordinate preparedness, emergency response, and reconstruction. Officials say the move will address megaquake risks along the Nankai Trough and in Tokyo, improve evacuation centers, and boost cross-ministry coordination.
A magnitude 5.5–5.7 earthquake has struck western Shizuoka Prefecture, injuring more than 20 people and causing train delays. The quake struck at 1:04 a.m. local time, with its effects felt across Aichi, Kyoto, Nara and nearby prefectures. Authorities warn of possible aftershocks and mudslides in the coming days.