The Ohta River is a river located in Japan, flowing through the city of Ohta in Gunma Prefecture. It is a tributary of the Tone River, contributing to the region's water system and supporting local ecosystems. The river is approximately 40 kilometers long and is known for its scenic beauty, with surrounding landscapes that include mountains and forests. It plays a vital role in irrigation and provides recreational opportunities for residents and visitors, such as fishing and walking along its banks.