Innoshima Suigun Castle

Built in 1983 in Innoshima, the hometown of the Navy, it is a castle-shaped Navy Museum that is rare in Japan. From the Northern and Southern Dynasties to the Muromachi Warring States period, the Murakami Suigun conquered the sea routes around here and played an active role as a navy kingdom. Raising the flag of the Hachiman Daibosatsu, it made its name known from the Korean Peninsula to China and Southeast Asia. Historical materials such as armor, relics, and ancient documents are displayed in the main enclosure, and the corner yagura, which doubles as an observatory, is a museum for ships.