Ōshima Strait
The Ōshima Strait is a strait between the islands of Amami Ōshima and Kakeromajima in Japan. It is part of the Amami Guntō National Park. From the western most side to the eastern most side of the strait, the strait measures 17.5 miles long.
Ferry lines
There are 5 ferry lines that go through the strait. Each of them depart from the Setonami port in Amami Oshima island. These ferry lines operate often as transportation between these ports are very popular.| Starting point | Ending point |
| Anami Oshima island | Kakeromajima island |
| Anami Oshima island | Kakeromajima island |
| Anami Oshima island | Ukejima island |
| Anami Oshima island | Tokunoshima island |
| Anami Oshima island | Anami Oshima island |