Shinanogawa

Shinanogawa is the longest river in Japan, flowing through Nagano and Niigata prefectures. Its total length is approximately 367 kilometers. The river originates in the Kiso Mountains in Nagano Prefecture and flows generally north and northwest before emptying into the Sea of Japan at the city of Niigata. Along its course, the Shinanogawa is joined by numerous tributaries, significantly increasing its volume. Historically, the river has been crucial for transportation, agriculture, and power generation. Its fertile floodplains have supported rice cultivation for centuries. Numerous dams have been constructed along the Shinanogawa and its tributaries for hydroelectric power generation, flood control, and water supply. The river's delta region in Niigata Prefecture is a significant agricultural area. The Shinanogawa is also known for its natural beauty and recreational opportunities, including fishing and boating. The river's name is derived from its historical course and the regions it traverses.