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Whitewater rafting on the Yoshino River through Koboke Gorge. Full-day (approx. 6.5 hr), half-day (approx. 3.5 hr) and family tours (ages 6+). English-speaking guides; free pickup from JR Awa-Kawaguchi Station with advance booking. Season April–November.
Arranges half/full-day rafting trips from ¥5500/10000, mostly mid-spring to mid/late autumn (lunch included for full day). Canyoning is offered as well. A very chilled out group of experienced guides are here who seem to like having a good time. Good English is spoken by all the staff. Located just near Tosa-Iwahara station. Station pick-up from Oboke is also available. Cafe and accommodation services are also available as well.