Passive House with Sundial is a minimalist residence located in Nara, Japan, designed by Kikuma Watanabe. This home in Japan is a passive house in which a sundial is set. By adapting to a passive system, the internal spaces support a comfortable environment where in summer there is a naturally cool atmosphere, and in winter, there is warmth. With this built-in sundial, the time can be told through the line drawn by natural light.