Mount Aso
The Chikugo River (筑後川, Chikugo-gawa) flows through Kumamoto, Oita, Fukuoka and Saga prefectures in Japan. With a total length of 143 kilometres (89 mi), it is the longest river on Kyushu. It flows from Mount Aso and empties into the Ariake Sea. The river is important to industry, with twenty electrical power plants located along its banks, as well as the major city of Kurume in Fukuoka Prefecture.