Oboke and Koboke Gorges

大歩危小歩危

Twin mountain gorges straddling the Yoshii River known for boat tours through narrow canyons with striking rock formations and seasonal foliage. The scenic boat journey is one of Shikoku's most memorable experiences.

Things to do

• Gorge Boat Tour — Navigate the narrow canyon passages of both gorges by traditional wooden boat, passing through dramatic rock formations and seasonal scenery.
• Oboke Gorge Hiking — Trek along riverside trails with panoramic views of the steep gorge walls and the Yoshii River below.
• Koboke Gorge Observation Deck — Visit the scenic overlook platform for photographs and sweeping vistas across the canyon landscape.
• Seasonal Foliage Viewing — Experience vibrant autumn maple leaves or spring cherry blossoms reflecting in the river and framing the rock faces.
• Yoshii River Rafting — Navigate gentler stretches of the river in small groups for a more active water experience than the traditional boat tours.
• Gorge Museum Visit — Learn about the geological formation and local history of the gorges at the small visitor center near the boat dock.

Food to try

• Ayu (Sweetfish) Grilled Over Charcoal — Fresh river ayu caught from the Yoshii River, grilled whole and salted, a regional specialty celebrating the local waters.
• Imo Taki (Potato and Vegetable Hot Pot) — A hearty mountain dish of layered potatoes, vegetables, and sometimes chicken simmered in a communal pot, warming and filling.
• Sudachi-Infused Local Cuisine — Dishes incorporating sudachi, a citrus fruit native to Shikoku, drizzled over grilled fish and vegetables for bright acidity.
• Soba from Mountain Spring Water — Buckwheat noodles made with pristine water from the surrounding mountains, often served cold or in hot broth at riverside restaurants.
• Gorge Dango (Sweet Rice Dumplings) — Local mochi-like sweets sold at stalls near the boat docks, often flavored with local ingredients or wrapped in leaves.

Local customs & good to know

• Boat Tour Etiquette — Wear non-slip shoes and hold railings securely; boatmen may navigate shallow or turbulent sections where stability matters for safety and respect.
• Early Morning Visits — Arrive early to secure boat tour spots, especially during autumn foliage season when tours fill quickly and morning light illuminates the gorge walls best.
• Seasonal Access Awareness — Heavy rainfall can sometimes close boat tours temporarily; check conditions ahead, and note that spring and autumn offer the most reliable scheduling.
• Local Mountain Respect — The gorges hold spiritual significance in Japanese nature reverence; stay on marked paths, carry out all trash, and avoid loud behavior to preserve the tranquil atmosphere.