Sakazuki River flows into the Sea of Japan in the west of Hokkaido Prefecture. This river, which collects snowmelt from the Shakotan Peninsula, is known among canoeists as a river where they can enjoy some wild river rapids. In this episode, French and Japanese canoeists fully enjoy adventurous kayaking. Slope-like fast-flowing stream and a series of waterfalls await them as they navigate the rapids. The 2 challenge these difficult courses by using their skills. Later, we also show you footage of freshwater fish that sustain life in this river, flowing into the Sea of Japan.