Originally 2 hills. The space between the hills was filled in by the residents of the community during the late 15th and early 16th centuries. After that was done, construction of the castle began. Matsuyama castle is one of the finest castles in Japan. It has never suffered from prolonged periods of conflict, which has kept it intact. Beneath the castle lies what remains of the castle barracks, which today is a park for visitors and has past history of the castle on display.