We built a Japanese Tea Room in Setagaya, Tokyo, for practicing of Japanese archery (Kyudo) and enjoying tea ceremony. The room consists of a small area with two tatami mats and a larger area with eight tatami mats. To comply with fire prevention regulations, we installed fireproof shutters in front of the entrance and fitted wooden fittings at the entrance with fire-retardant sleeve walls. When designing a traditional Japanese-style building in Tokyo, it can be challenging to balance Japanese aesthetics with legal regulations. The entrance hall is a spacious waiting area where visitors can practice Japanese archery.