Innoshima Suigun Castle

Built in 1983 in Innoshima, the home of the navy, this castle-style naval museum is rare across Japan. From the Northern and Southern Courts to the Muromachi and Sengoku periods, the Murakami Navy dominated the sea routes around this area and played an active role as a naval kingdom. Hoisting the flag of Hachiman Daibosatsu, their name was known from the Korean Peninsula to China and Southeast Asia. Historical materials such as weapons, relics, and ancient documents are on display in the main citadel, and the corner tower, which also serves as an observation deck, is a museum of ships.