Tagokura Dam (田子倉ダム) is a gravity dam, on the Tadami River in the Fukushima Prefecture of Japan. It is owned and operated by the Electric Power Development Company (J-Power). The lake which it impounds is known as Lake Tagokura. The dam is 462 m long and 145 m high. It supplies a 380 MW hydroelectric power station that is also owned by J-Power.Lake Tagokura has a surface area of 995 hectare and a capacity of 494,000,000 m3. The catchment area is 816.3 km2. Construction of the dam started in 1953 and it was completed in 1959. In order to facilitate the movement of construction material, the existing railway from Aizu-Wakamatsu to Aizu-Miyashita was extended to Aizu-Kawaguchi, and a light railway was built from there to the construction site. After the dam was completed, the light railway was upgraded and extended to link to an existing line at Oshirakawa, thus creating today's Tadami Line.