Ōuchi Kappa House

大内かっぱハウス

Located in Chiba Prefecture, Ōuchi Kappa House is a museum that displays approximately 4,000 items related to kappa collected from across the country. The facility includes works by artists such as Ogawa Imozen, Shinobu Shimizu, and Ko Kosima. Since its renewal in 2017, it has also featured an adjacent section known as the Yamashita Shintaro Monster Museum.