![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Nankai_trough_topographic.png/640px-Nankai_trough_topographic.png&w=640&q=50)
Nankai Trough
submarine trough located south of Japan's island of Honshū / From Wikipedia, the free encyclopedia
Nankai Trough (南海トラフ, Nankai Torafu) is a submarine valley south of Japan's islands of Honshū and Shikoku. It is about 900 km offshore. The undersea valley runs on a line which is roughly parallel with the coast of the two Japanese islands.[1]
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/b/bb/Nankai_trough_topographic.png/640px-Nankai_trough_topographic.png)
This feature is in a marine area called Nankai.[2]