Yoyogi Uehara, the target site, is located in Shibuya Ward, Tokyo, in a quiet residential area and is home to the Tokyo camii Mosque, the center of Islam in Japan. However, Yoyogi Uehara is divided by the closed-off use of the space under the elevated railroad tracks, and the sudden appearance of the mosque in a residential area makes us, non-Muslims, feel inaccessible. Opening up the space under the elevated railroad tracks will expand the range of people's activities. We designed the building by focusing on two points: the potential of the space under the railway tracks as an open space and the landscape design for the coexistence of the religious facilities and the local environment.