Honshu is the largest and most populous island of Japan, and it is home to many important seaports. Kobe, Osaka, Ube, Kure, and Yokohama are all major seaports located on the island of Honshu. Kobe is a 4-letter port city located in the Kansai region of Japan, while Osaka is a 5-letter port city located in the same region. Ube is a 3-letter port city located in Yamaguchi Prefecture, and Kure is a 4-letter port city located in Hiroshima Prefecture. Finally, Yokohama is an 8-letter port city located in Kanagawa Prefecture, which is just south of Tokyo. All of these cities are important seaports located on the island of Honshu.