1311-Yamasato Oike/Yamasato Oike
In the dam handbook, the location is listed as "Hokusei-cho Yamago," and the name of the place did not exist due to rezoning or something, but if you trace the name of the nearby Yamago Elementary School and pond on the map, the characters are different, but it is "皷" which probably refers to this place. / Earth / 22m