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Zashukan/Denpoji Temple Ruins

There is a small mountain called Zashukan at the foot of the mountain in the western part of the town, and it is said that there was a castle there, but the owner of the castle is unknown. The foundation stone and monument still remain. Also, at the southern foot of the mountain are the remains of a Buddhist temple called Yahikosan Denpo-ji Temple of the Tendai sect. However, as a complex of medieval mansion ruins and Buddhist temple ruins, castle walls and other features still remain in the area.

Jonaiyama Observation Deck

Mt. Jonai is 328m above sea level. It takes 30 minutes on foot from the Yanzan dam side to the summit, or you can also climb by car. The observation deck at the top of the mountain offers a panoramic view of the town.

Tokutan Castle Ruins

An ancient castle fence built by the conquering shogun Bunshiro Watamaro in the early Heian period (around 813). Divided by a rectangular outer wall approximately 350m on each side, it was built for the purpose of pacifying Ezo and controlling the Shiba region, and is a nationally designated historic site. It has been developed as a historical park, and you can see artifacts excavated from the Tokutan Castle ruins at the folklore museum inside the park.