Kimura was one of warehouses and later they were chosen as the direct provider for the castle lords. Kimura was merchant class, but they were allowed to have family name, carry Katana and other samurai privileges. They supported the finance of Iwamura government, and helped make a new rice field, road constructions and development of Iwamura culture.
... was the secret window which used when Daimyo Parade was happening and house owner was able to see out side quietly.
The structure of the house with living room, store space, kitchen, tea room and other rooms is a great example of the powerful merchant house in Edo period.