The Kushiro River is the longest river in Hokkaido, Japan, stretching approximately 150 kilometers. It flows from the Kushiro Marsh, a designated national park, and empties into the Pacific Ocean. The river is known for its rich biodiversity, including various fish species and wildlife that inhabit the surrounding wetlands. The river plays a crucial role in the local ecosystem and economy. It supports fishing activities and provides water for agriculture in the region. The Kushiro River is also a popular destination for outdoor enthusiasts, offering opportunities for canoeing, birdwatching, and enjoying the scenic landscapes.