Japan alerts on megathrust earthquake amid rising Nankai Trough seismic activity

TOKYO: Japan has warned of a 70–80% chance of a magnitude 8–9 earthquake along the Nankai Trough within the next 30 years, which could trigger a devastating tsunami and widespread damage.

The government has revised its national disaster plan to aim for an 80% reduction in fatalities and to mandate earthquake-resistant buildings by 2035.