The is a concrete arch-gravity dam on the Tadami River, southwest of Tadami in Fukushima Prefecture, Japan. The primary purpose of the dam is hydroelectric power generation and it supports a 182 MW power station. The power station contains two Kaplan turbine-generators. Unit 1 (95 MW) was commissioned on 20 November 1963 while Unit 2 (87 MW) was commissioned on 7 June 2003 as part of a power plant expansion project that included an additional 200 MW generator at Okutadami Dam upstream. The dam is tall and long. Its reservoir has a capacity of which is active (or "useful") for power generation. The reservoir has a catchment area of and surface area of . Of the two generators, Unit 1 has a maximum effective hydraulic head of and Unit 2 is afforded . The design flood discharge of the dam is and its service spillway is controlled by three tainter gates.
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