The Suenaga family was one of Nagahama's wealthiest, having run a shipping business for generations. Shirohei Suenaga, the head of the family during the Meiji period and the promoter of this house, served as the mayor of Nagahama Town. The Hyakujo zashiki in this residence is a one-story wooden building, thought to have been used by the Suenaga family to host customers. It consists of two 18-tatami mats of tatami rooms and an attached 5-tatami room. The interior features elaborate ceilings and Western-style lighting fixtures.
At the time, there were not many buildings with this type of floor plan, and as a building that was open to visitors, it can be said that it had a considerable impact and served as a reference for the local community.