Japanese Oni Exchange Museum exhibits oni (demon, ogre) artwork and local oni legends of the Oeyama Mountains. Masks, statues, kawara roof tile ornaments, and paintings of oni from all over Japan and some from overseas.

All donated to the museum. The museum is at the foot of the Oeyama Mountains (大江山). The Oeyama mountains are known for famous oni legends. That's why this museum was built here.