Registered: Registered as a global Heritage Irrigation Structure (2015)
Construction date: 1633
Volume of water stored: 15,180,000m3
Selected: One of the “100 best reservoirs” by the Ministry of Agriculture, Forestry and Fisheries
Comment: This is the second-largest man-made lake in Japan. It was built as a reservoir for irrigation over the course of ten years starting in 1632. The dam burst in 1868 due to flooding in an event called the “Irukagire”, causing great damage in the Gojo River basin.