It is famous for the duel between Miyamoto Musashi and Sasaki Kojirō. The small island was named for its boat-like appearance, and later came to be called after the Ganryū kenjutsu school Kojirō 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.[circular reference]