an arm of the Pacific Ocean in southern Japan; surrounded by the islands of Honshu and Shikoku and Kyushu and linked to the Sea of Japan by a narrow channel; the chief port is Hiroshima
A large but relatively shallow expanse of water within a landmass, sometimes connected to the ocean.
A body of water that separates three of the main islands of Japan, i.e. Honshu, Shikoku and Kyushu.