Hamayuu Sanso is a leisure facility completed in 1987 and designed by Oka Sekkei for the Yokosuka citizens' recreation village program. Located in Kurabuchi Village, Gunma Prefecture, this modest accommodations building exemplifies the thoughtful approach to resort architecture that characterized Japanese leisure facilities during the 1980s. The structure reflects Oka Sekkei's sensibility toward integrating built environments with natural surroundings, a hallmark of their architectural philosophy. As a public recreational facility from the bubble economy era, Hamayuu Sanso represents an important chapter in Japan's approach to citizen welfare and tourism infrastructure development during this distinctive period.