Yamanakakoasanso is a residential building completed in 1982, located in Yamanakako Village, Minamitsuru District, Yamanashi Prefecture. Designed by architects Shinei Sato and Kosuke Iida, this structure represents an important example of residential architecture from the early 1980s. Situated in the scenic Yamanaka Lake area, the building demonstrates thoughtful integration with its natural surroundings. The work of Sato and Iida reflects the architectural sensibilities of the period, combining functional design with consideration for the lakeside environment. This residence exemplifies the era's approach to vacation home architecture in Japan's mountainous regions.