Naoshima Town Civic Gymnasium and Martial Arts Hall, completed in 1976, represents a significant example of modernist sports architecture in Japan's Seto Inland Sea region. Designed by architect Kazuhiro Ishii and his research institute, this indoor facility showcases the functional design principles characteristic of 1970s Japanese architecture. Located within Naoshima's educational district in Kagawa Prefecture, the building combines athletic and martial arts facilities in a cohesive structural design. Its construction reflects the post-war period's emphasis on public amenities and community infrastructure development. The facility demonstrates Ishii's approach to institutional design, merging practical gymnasium requirements with architectural expression typical of the era's modernist movement.