"OniBath" is a unique tile bowl with a motif of Ridge-end Tile, special to Mikawa area in Japan, called "Sanshu OniGawara tile". The tile is a famous Japanese traditional craft. The bowl on display can demonstrate features of the Japanese tile as much as possible. Using natural materials with a special manufacturing technique applied, the bowl has a high durability, leading to an everlasting use over several generations. The bowl used as an ornamental fish pot for example, gives off pretty colors emitted from the surface carbon nano-film of the tile material, imaging the fish gorgeously. This unique bowl can serve a variety of uses as an interior product.