Togakushi Sanso is a residential mountain retreat completed in 1982, designed by RE Sekkei Jimusho. Located in Togakushi Village, Nagano Prefecture, this dwelling exemplifies thoughtful architectural planning in alpine environments. The design thoughtfully integrates the building with its mountainous surroundings while providing comfortable living spaces. Completed during a period of increasing interest in vacation homes and weekend retreats in Japan, Togakushi Sanso demonstrates the architectural principles of the early 1980s for residential design in rural mountainous areas. The structure reflects contemporary approaches to blending modern comfort with natural landscape integration.