3. Matsumae CastleMatsumae Cho Matsumae is a town located in Oshima Subprefecture, Hokkaido, Japan. The former home of the Matsumae Han, it has an Edo period castle, Matsumae Castle, the only one in Hokkaido, and Ryūun-in. The total area of the town is 293.11 square kilometres . From Wikipedia, the free encyclopedia.