Kaikoen is a castle ruins park built on the site of Komoro Castle which was built by Takeda Shingen during the Age of the Civil Wars. Some gates rebuilt during the Edo period still exist. Fujimura Memorial Hall, Koyama Keizo Museum of Art, and a zoo are also built inside the park. The city of Komoro is located at an elevation of 670 meters on a slope between Mount Asama and Chikuma River. It prospered as a castle town when the Komoro Castle was built by the lord Komuro during the Kamakura period. As you stroll through the streets of Komoro seeing the adobe houses, old temples, and stone Buddha statues and feel the smoke rising from the peak of Mount Asama, you will feel very nostalgic.