Notification of Start of Business Service of Hydraulic Power Station(Kumamoto / Shirakawa Power Station)

  • Press release
  • UP
  • jnc

JNC CORPORATION (Chiyoda-ku, Tokyo, CEO & President: Keizo Yamada) announces the completion of renovation of the hydraulic power station owned by JNC in Kikuchi-gun,Kumamoto, and its new start of business service.

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JNC Group regards the environment and energy group as an important business domain. We own hydraulic power stations (total maximum output of 96,900 kW) in 13 places and photovoltaic power stations (total maximum output of 16,000 kW) in 4 places in Japan for developing the power generation business using renewable energy.

Among the hydraulic power stations undergoing large-scale renovation since 2013, the Shirakawa Power Station has started business service. This is the eighth station undergoing large-scale renovation to start business service. By renewing the water turbines and generators to high-efficiency equipment, the maximum output was increased by 500 kW (about 6%) while keeping the approved water intake amount. JNC will take advantage of the power generation technologies cultivated so far to contribute to the society by supplying stable energy in future years with consideration for the environment.

All of our hydraulic power stations adopt a "run-of-river type" system. In this system, foreign matters are removed from river water, the water is guided via a channel into a head tank and dropped through a penstock to turn a water turbine for generating electricity. Since the run-of-river type hydraulic power generation does not require a large-scale dam, it is friendly to the environment, has low carbon dioxide emission and provides precious, purely domestically-produced energy.

<Outline of Shirakawa Power Station Power Station>

(1) Location


(2) Maximum output

Before renovation

9,000 kW

After renovation

9,500 kW (annual power generation amount for about 13,900 houses)

(3) Investment

About 2.6billion yen

(4) Start of construction work

April 2016

(5) Start of business service

April1, 2020