Answer
The Kumagawa River, as its name suggests, flows through Kumamoto. It is the longest river in Kyushu, Japan, stretching over 115 kilometers. The river originates from Mount Aso and meanders through the Kumamoto Plain before emptying into the Shiranui Sea. The Kumagawa River is a vital resource for the region, providing water for irrigation, drinking, and transportation. It is also a popular destination for fishing, boating, and other recreational activities.