The Ota River is a significant waterway located in Japan, flowing through the Gunma and Tokyo prefectures. It spans approximately 112 kilometers and is known for its scenic beauty and ecological importance. The river is a tributary of the Tone River, contributing to the region's water system. The Ota River is also a popular spot for recreational activities such as fishing and cycling along its banks. Its surrounding areas are rich in flora and fauna, making it a vital habitat for various species. The river plays a crucial role in supporting local agriculture and communities.