WebHonshu (本州, Honshū, pronounced [hoꜜɰ̃ɕɯː] ⓘ; lit. ' main island '), historically called Akitsushima (秋津島, lit. ' Dragonfly island '), is the largest and most populous island of Japan. It is located south of Hokkaidō across the Tsugaru Strait, north of Shikoku across the Inland Sea, and northeast of Kyūshū across the Kanmon Straits.The island separates the Sea of Japan ...