吉野川
The major river in Shikoku is the Yoshino River. It runs from its source close to Mount Ishizuchi, flowing basically west to east across the northern boundaries of Kōchi and Tokushima Prefectures, reaching the sea at the city of Tokushima. The Yoshino is famous for Japan's best white-water rafting, with trips going along the Oboke Koboke sections of the river.