The Kuriyama River (栗山川, Kuriyama-gawa) is a river in northeast Chiba Prefecture, Japan. It is 38.8 kilometers (24.1 mi) in length and has a drainage area of 292.3 square kilometers (112.9 sq mi), the second largest in Chiba Prefecture. Under the the Kuriyama is designated as a Class 2 River. The Kuriyama is known as the southernmost river in Japan with a salmon run. The Yamakuragawa Fishing Port (栗山川漁港, Kuriyamagawa Gyokō) is located at the mouth of the river in Yokoshibahikari.