Hatanodai Collective Housing, completed in 1974 in Shinagawa Ward, Tokyo, represents a significant example of Japanese residential architecture from the post-war modernist period. Designed by Koichi Sone and Environmental Design Institute, this collective housing project exemplifies the innovative approaches to urban living that characterized the 1970s. The building demonstrates thoughtful integration of communal spaces with individual residential units, reflecting contemporary concerns about community formation in densely populated urban environments. Its architectural language and spatial organization make it a notable case study in the evolution of Japanese collective housing design and modernist principles applied to residential development.