Hisaya Iwasaki hired the British architect, Josiah Conder, who designed a two-story Western-style main building and the Swiss-style billiards house.

The design is based on the Jacobean style of England in the 17th century, which incorporates Islamic motifs of the Renaissance.

It is a Japanese type of washi paper using the technique of metal foil applied through a woodblock roll and hammered with a brush, and has the appearance of coloured leather.

[1][2][3] Billiards house was designed to be reminiscent of a Swiss mountain chalet, a style very rarely seen in Japan.

This building is made completely of wood, it features log walls with carved pillars and a roof with protruding eaves, a design that shows signs of Gothic style.

There exist screens and fusuma sliding door paintings done by a well-known painter of the period, Hashimoto Gahō.