01 / Main house
In the attic of the main housewas left a ridgepole plaque recording its construction.

The main house of the former Aoyama residence was completed in 1890, three years after it was planned in 1887. The town describes the ridgepole plaque in its attic as being "of a kind found nowhere else." It calls the large tiled roof, built in a village of thatched roofs, a way of "returning home in glory."
- Main house completed in 1890
- 12 ken wide, 7 ken deep
- Ridgepole plaque in the attic