The Katsuura River is a river located in Chiba Prefecture, Japan. It flows through the city of Katsuura and empties into the Pacific Ocean. The river is approximately 30 kilometers long and is known for its scenic beauty, attracting visitors for recreational activities such as fishing and kayaking. The Katsuura River is also significant for its role in the local ecosystem. It supports various species of fish and wildlife, contributing to the biodiversity of the region. The river's surrounding areas are often enjoyed by nature enthusiasts and serve as a habitat for many plants and animals.