Water resources such as river water and groundwater are used for domestic water, irrigation water, and industrial water. In Japan today, river water accounts for about 90% of these resources.

Rain, the source of river water, is not constant in its pattern. Lack of rain, if it continues, will reduce the amount of river water, which in turn will cause a drought. Torrential rains due to a typhoon and a heavy rain in the rainy season can cause floods.

Rivers in Japan are generally steeper than those in other countries, and there is a large gap between the amount of river water during a drought and that at the time of flood. It is therefore necessary to stabilize the amount of river water as much as possible with dams and other means to increase the availability of river water.

In addition, to meet with the risks such as large-scale disasters as earthquakes and others involved in the climate change caused by the global warming, and also our facilities degradation, we are now proceeding with the enhancement of our facilities for earthquake resistance, our stock management, and risk management capabilities.