01 / Yunokuchi Reservoir
Beside the reservoir stands a shrineto the man who led its building.

Tōyama Yajibei, the village headman (惣庄屋), served as overall supervisor of this reservoir, built in the Ansei era. The project was run independently by the tenaga (手永), a unit of regional administration, and records also note that a briefing told villagers they would not be asked for funds or unpaid labor. Every April 4, a festival is held at Tōyama Shrine, with his descendants invited. It was designated a World Heritage Irrigation Structure in 2025.
- Built in the Ansei era
- April 4 each year: festival at Tōyama Shrine
- 2025: World Heritage Irrigation Structure

