Press Release
Hybrid dam initiative launched at Yahagi Dam - Increasing electricity production equivalent to consumption of about 1240 households per month -
August 07, 2025
Ministry of Land, Infrastructure, Transport and Tourism Chubu Regional Development Bureau
Yahagi Dam Management Office
Chubu Electric Power Co., Inc.
As a hybrid dam initiative, a trial for enhanced water level operation that contributes to power generation was conducted for the first time (Note 1) at the Yahagi Dam, which is managed by the Ministry of Land, Infrastructure, Transport and Tourism.
After the outflow of water on July 16 to 17, 2025, stable weather conditions continued, and the trial operation of enhanced water level management was conducted. Compared to normal operation at Chubu Electric Power's Yahagi No. 1 Hydraulic Power Station, approximately 1.79 million m3 of water could be effectively utilized. As a result of this effective utilization, there was an increase in electricity generation of approximately 321 MWh, which is equivalent to the amount of electricity consumed by approximately 1,240 households in one month (Note 2).
Going forward, the two parties will continue to collaborate and contribute to the realization of a decarbonized society by effectively utilizing limited water resources.
（Note1） The Yahagi Dam has been involved in trials of enhanced water level operation that contributes to power generation since the 2023 outflow period, and this is the first time that such trial operations have been implemented.
（Note2） Calculated based on the monthly electricity consumption of an average household being 260 kWh.
（Note） The results are preliminary and may be subject to change due to further scrutiny.
- Trial of enhanced water level operation that contributes to power generation It is an initiative that uses the latest weather forecasting technology to store water in the dam reservoir without interfering with flood response after flood control or outflows that do not lead to flooding. The water is then released for effective power generation at the adjacent power station.
- Initiatives in the Carbon Neutral (CN) Project on Yahagi River and Toyogawa River This enhanced water level operation is one of the initiatives in the CN Project on Yahagi River and Toyogawa River promoted by Aichi Prefecture.