Jōzankei Dam, Gravity dam in Minami-ku, Hokkaido, Japan
The concrete structure rises 118 meters high and stretches 410 meters across the Otaru River, creating Lake Sapporo with its blue waters.
The construction of this engineering project began in 1974 and reached completion in 1989, requiring 11 years of dedicated work.
The name changed from Otarunai Dam to Jōzankei Dam following local residents' requests, reflecting community involvement in regional development.
A 460-step boardwalk leads visitors to an observatory at 392 meters above sea level, offering views of the downstream park and surrounding area.
The reservoir holds enough water to fill Sapporo Dome 52 times and supports the Hokkaido region through flood control and hydroelectric power generation.
Location: Minami-ku
Location: Hokkaido
Inception: 1989
Height: 118 m
Website: https://hkd.mlit.go.jp/sp/toyohira_damu/kluhh4000000b7ql.html
GPS coordinates: 42.98320,141.15596
Latest update: May 14, 2025 15:39
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