What is the longest river in Japan?

The Shinano is the longest river in Japan, having a length of 228 miles. This river's source is at Mount Kobushi in Honshu. It flows in a northerly direction to discharge into the Sea of Japan near Niigata.

Japan is an island chain located in easter Asia. It has an area of 145,855 square miles. The Tone and Ishikari are the second and third longest rivers in Japan, respectively. The Tone River is 200 miles in length, and is also located in Honshu. This river originates in the Echigo Mountains, and drains into the Pacific Ocean. The Ishikari is 167 miles long, is on Hokkaido Island and empties into the East Sea.