Main building: Completed in 1887; a two-storey shoin (reception room) style building with sohinoki-zukuri (built with only a Japanese cypress), yosemune-zukuri (hipped roof), and kawarabuki (tiled roof); the Imperial throne is on the second floor; the total amount of floor space is 500 square meters and the construction cost was 10,000 yen (at the time of the construction).
本館-明治20年竣工、総檜造、寄棟造、瓦葺、二階建、書院風建築、2階に玉座、延床面積500m2、建設費１万円（当時）。