The Kii River is a significant waterway located in Wakayama Prefecture, Japan. It flows approximately 135 kilometers from the Kii Mountains to the Kii Strait, making it one of the longest rivers in the region. The river is known for its clear waters and scenic landscapes, attracting both locals and tourists. The Kii River plays an essential role in the local ecosystem and economy. It supports various wildlife and provides water for agriculture and fishing. Additionally, the river is part of the Kumano Kodo, a UNESCO World Heritage site, which highlights its cultural and historical importance.