is an island in Japan located between Honshà « and Kyà «shà «, and accessible via ferry from .
It is famous for the duel between Miyamoto Musashi and Sasaki Kojirà Â. The small island was named for its boat-like appearance, and later came to be called after the Ganryà « kenjutsu school Kojirà  had founded.
On the island are a few monuments as well as facilities for public gatherings such as an annual tug-of-war. Along the west coast is a walking path.
The western half of the island is currently being used by Mitsubishi Heavy Industries as a storage facility for its ship manufacturing and drydocks in Shimonoseki across the harbor.
New Japan Pro-Wrestling held two matches on the island. On October 4, 1987, Antonio Inoki defeated Masa Saito. On December 18, 1991, Hiroshi Hase defeated Tiger Jeet Singh.