Jōzankei Dam is a concrete Gravity dam in Sapporo, Hokkaidō, Japan situated upon the Otaru River. It supports a 120 MW hydroelectric power station.
Wikipedia https://en.wikipedia.org/wiki/Jōzankei_Dam
Address Jōzankei, Minami-ku, Sapporo, Hokkaidō 061-2301, Japan
Coordinates 42°59'5.852" N 141°9'26.659" E