noun
Nankai megathrust earthquake
Refers specifically to a massive earthquake expected to occur along the Nankai Trough off the Pacific coast of Japan. Used in disaster prevention and news contexts.
政府は南海トラフ地震の被害想定を公表した。
The government released damage estimates for the Nankai megathrust earthquake.
南海トラフ
A disaster drill was held in preparation for the Nankai megathrust earthquake.