Orderer Chubu Electric Power Co., Inc.
Completion 2015
Structure and scale Semi-underground power plant (Unit 1: 131 thousand kW; Unit 2: 22.4 thousand kW); headrace tunnel (NATM method): φ5m, L=250m; headrace gate shaft construction: φ11.0m, H=74.2m; hydraulic iron pipe: 902m; flood way: 122m
Location Gifu Prefecture
Application Hydroelectric power station

Kumagai Gumi was responsible for conveying water from the intake of Tokuyama Dam that it constructed and the construction of a semi-underground power plant with an output of 153.4 thousand kW (Unit 1: 131 thousand kW; Unit 2: 22.4 thousand kW) directly below the dam body.