Sekkunantei is a residential structure completed in 1982, designed by the Eiji Kobayashi Architectural Research Institute and located in Fujimi Town, Suwa District, Nagano Prefecture. This private residence exemplifies the architectural approach of its era, reflecting contemporary design principles and residential planning methodologies. The building represents a significant example of residential architecture from early 1980s Japan, showcasing the design philosophy and technical expertise of Kobayashi's practice during this period. Situated in the scenic Nagano region, Sekkunantei provides insight into how architects addressed residential design challenges while responding to the specific environmental and cultural context of mountain communities.