Yakushima Jomon Sugi Trekking — A Journey to an Ancient Cedar Forest

Yakushima Island, a UNESCO World Heritage Site since 1993, is one of Japan's most biologically extraordinary places — a rainforest island where ancient cedar trees, endemic wildlife, and staggering rainfall create an ecosystem of haunting beauty. The Jomon Sugi trekking course is the most celebrated walking route in Kyushu, leading through progressively older and wilder forest to the oldest and largest of Yakushima's magnificent yaku-sugi cedars.

Highlights

The Arakawa-Jomon Sugi trekking route covers approximately 22 kilometers round-trip, ascending from the Arakawa Trailhead along an old logging railway track before entering the ancient forest zone. The railway section — walked on old wooden sleepers through a tunnel of cedar and moss — is itself remarkable. As the trail climbs, the trees grow older and more fantastical: Wilson Stump, a cedar felled in the 1590s whose hollow interior shelters a small shrine, frames a heart-shaped sky above. Daiosugi (the "patriarch cedar") is estimated at 3,000 years old. Jomon-sugi itself, behind its observation deck, rewards the 4–5 hour ascent with an encounter with something genuinely ancient. The forest floor is carpeted in over 200 species of moss, giving the landscape a soft, luminous green quality.

Getting There & Tips

Flights from Kagoshima take 35 minutes; high-speed ferries take 2 hours. The Arakawa Trailhead shuttle bus runs from April to November (advance booking required in peak season). Start by 5 AM at latest. Pack at least 2 liters of water, high-energy snacks, and complete waterproof clothing. A certified Yakushima guide is strongly recommended for first-time visitors.

Best Time to Visit

May and October–November offer the best weather windows with reduced rainfall and comfortable temperatures. The forest is magical even in rain but the experience is more demanding. Avoid Golden Week (late April–early May) for crowds. Winter brings snow at elevation but the forest floor remains accessible.