Jomon Sugi Trail
Jomon Sugi Trail: Complete Guide to Hiking Yakushima’s Ancient Cedar Forest
Venture into the heart of Yakushima Island on the Jomon Sugi Trail, where ancient cedar giants tower above a rich carpet of moss and ferns, and mist drifts through the dense, emerald-green canopy. This trail winds through a UNESCO World Heritage forest, immersing you in a landscape that feels both timeless and enchanted, with every turn revealing new layers of natural beauty, tranquil streams, and the unforgettable sight of the monumental Jomon Sugi tree.
The Jomon Sugi Trail offers more than just a physical challenge; it is a journey into the depths of one of Japan’s oldest and most mystical woodlands. Throughout the hike, you’ll experience pristine wilderness, the soothing sounds of birdsong and rushing water, and the thrill of uncovering hidden relics entwined with centuries-old legends.
Route Overview
The Jomon Sugi Trail is an out-and-back route that typically starts at the Arakawa Trailhead on Yakushima Island. The trail follows an old logging rail line (the Kusugawa Trail) for the first segment, passing through forest and along mountain streams, before branching off at the Kosugidani remains and ascending through a series of boardwalks, steps, and rugged forest paths. Key locations along the way include Wilson’s Stump, Daiō Sugi, Meoto Sugi, and various rivers and footbridges. The hike officially culminates at Jomon Sugi, the island’s oldest and most revered cedar.
The total distance is approximately 22 kilometers round-trip and generally requires 8 to 10 hours to complete, depending on pace, rest stops, and weather. The trail features varied surfaces such as boardwalks, dirt, rocky paths, and some steep inclines. Trail signage is clear, and facilities like restrooms, shelters, and water sources are available at select points, though hikers must be otherwise self-sufficient. Due to the length and elevation gain, an early morning start is strongly recommended, as is careful attention to timing to ensure completion before dusk. Trail access is regulated, and hikers may need to arrange shuttle transport to and from the trailhead, especially during peak hiking periods.
The Ancient Legacy of Jomon Sugi
The Jomon Sugi Trail is steeped in history, intertwined with the origins of Yakushima Island’s ancient cedar forests. The trail’s namesake, Jomon Sugi, stands as Japan’s oldest and largest cryptomeria tree, its age estimated at between 2,000 and over 7,000 years. This sacred tree draws its name from the Jomon Period (c. 14,000–300 BCE), linking it to some of Japan's earliest inhabitants. For centuries, local communities regarded these vast woods with reverence, believing them to house kami—spiritual beings from Shinto tradition.
Yakushima’s forests, and Jomon Sugi in particular, were relatively unknown beyond the island until the mid-20th century. In 1966, lumber workers rediscovered the giant cedar, sparking national curiosity and igniting efforts to preserve these unique woodlands. The tree and its surroundings quickly became a symbol of nature conservation in Japan, leading to Yakushima’s designation as a UNESCO World Heritage Site in 1993. Today, walking the Jomon Sugi Trail is not only a physical journey but also a passage through millennia of natural and cultural history, connecting hikers to Japanese heritage and the longstanding bond between people and the land.
Notable highlights
- Jomon Sugi: The main highlight of the trail, this ancient cedar is an imposing natural monument estimated to be over 2,000 years old, with a massive trunk circumference and a profound presence that captivates all visitors.
- Wilson’s Stump: A giant hollowed-out cedar stump named after British botanist Ernest Wilson, large enough to step inside. The view from within forms a natural heart-shaped window, making it a popular photo spot.
- Ohkabu Trailhead: The starting point for the ascent, marked by dense forests and fresh mountain air, signaling the beginning of the adventure.
- Mt. Miyanoura Views: While not summited on this trail, glimpses of Yakushima’s highest peak can be seen along the ascent, offering striking mountain backdrops.
- Mossy Forests and Ancient Trees: The route weaves through lush, emerald-green forests and passes by several notable old-growth yakusugi cedars, draped in thick moss and surrounded by ferns and lichen.
- Koguchi no Ie Hut: A simple mountain hut, useful for rest breaks and protection from the elements, set in the tranquil forest ambiance.
- Mountain Streams and Bridges: Cross numerous wooden bridges over crystal-clear streams, where the soothing sounds of rushing water enhance the peacefulness of the hike.
- Daiō Sugi and Meoto Sugi: Other impressive ancient cedar trees en route, each with its own unique shape, history, and allure, providing opportunities to appreciate the diversity and grandeur of Yakushima’s natural wonders.
Challenges to expect
Hikers on the Jomon Sugi Trail should prepare for a long and physically demanding journey, with the round-trip distance stretching approximately 22 kilometers and typically requiring 8 to 10 hours to complete. The trail begins on an old railroad track, but soon transitions to uneven dirt and rocky paths, interspersed with numerous stairways and boardwalks. The consistent elevation gain, combined with occasional steep ascents, can be challenging even for experienced hikers.
Weather is another significant challenge on Yakushima. The island is famous for its frequent and heavy rainfall, particularly during the spring and summer, which can make trails slippery, muddy, and more hazardous. Dense cloud cover and mist are also common, potentially reducing visibility. Navigationally, the trail is generally well-marked, but early morning starts are required, and those unfamiliar with mountain environments should be cautious about time management to avoid hiking in the dark.
Lastly, limited access to amenities along the trail means hikers must carry adequate water, snacks, and rain protection. Cell phone reception is weak or nonexistent along most of the route, and emergency response may be delayed due to the remote terrain.
Japan - Mountainous
- Forest
- Dirt
- Rocky
- Boardwalk
- Huts
- Campsites
- Family Friendly
- Restrooms
- Water Sources
- Campsites
- Shelters
The hike begins at the Arakawa Trailhead, following an old rail track (Kusugawa Trail) alongside mountain streams and through dense cedar forests for about 8 kilometers. After passing the remnants of Kosugidani settlement, the trail leaves the railway and begins a steady ascent with a combination of boardwalks, stairways, and rugged paths. Significant waypoints include Wilson’s Stump, Daiō Sugi, and Meoto Sugi, each offering unique ancient cedar features. The final stretch climbs to the viewpoint of Jomon Sugi, Yakushima’s oldest tree. After taking in the sight, hikers retrace their route back to the trailhead, completing the challenging circuit. Facilities along the way are limited to shelters and rest areas, so hikers must be well-prepared for the full day hike.