Japan issued its first Nankai Trough emergency information in August last year following a major quake off Miyazaki ...

According to Japan's Earthquake Research Committee, there’s an 80 percent chance that a megaquake could occur in the Nankai Trough within the next 30 years. That's slightly up from the 70 to 80 ...

Japan completed the world’s first real-time ocean floor earthquake detection system in June 2025, giving 20 seconds more ...

In Japan, swarms of earthquakes are fueling a dip in tourism and a viral panic over predictions of the next 'big one' ...

Japan's weather agency said Friday that a malfunction in the ocean-floor observation system off the Pacific coast, installed ...

Japan's weather agency said Wednesday that data from an offshore tsunami gauge in the Pacific Ocean is currently unavailable, ...

Megathrust earthquakes are large earthquakes that occur on faults found along the boundaries between tectonic plates. The ...

A Nankai Trough quake off Shikoku in 1946 killed more than 1,300 people. The area was hit by a 7.1 magnitude quake in August last year.

The undersea, magnitude 9.0 “megathrust” earthquake—the worst in Japan’s recorded history—began in the Pacific seafloor 45 miles off the country’s eastern coast.

A quake with a preliminary magnitude of 6.9 struck the Kyushu region at 9:19 p.m. (0019 GMT) on Monday, the Japan Meteorological Agency said.

Monday’s temblor came months after a magnitude 7.1 earthquake struck the Hyuganada Sea in August, prompting the agency to issue its first-ever megaquake advisory for the Nankai Trough.

Earthquakes can’t be predicted. But a manga artist’s dream of a July 5 'megaquake' has spooked some residents and travelers.