This track was identified and mapped via high-resolution satellite imagery.
Jomon Sugi Trail via Arakawa
A long day hike through Yakushima's moss-covered cedar forest to Jōmon Sugi, the island's oldest and largest cedar, estimated at thousands of years old. From the Arakawa trailhead, the route follows an old forestry railway along the river, then climbs on a path past Wilson's Stump and the giant Daiō-sugi to the viewing deck at Jōmon Sugi. Yakushima is a UNESCO World Heritage Site.
Trail Map
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Trail Profile
General Instructions
About 19.5 km return with roughly 700 m of climbing. Most of the first half is level railway track; the second half is steep steps and roots. Allow 10 hours and start before dawn on the first shuttle. Yakushima is one of the wettest places in Japan: carry rain gear and a head torch.
Weather check
Sampling Micro-Climate...
30.3399, 130.5952
Slide to preview conditions across the entire route • Point: 30.3399, 130.5952 @ 601m
Quick Stats
Highlights
- Look up through the hollow of Wilson's Stump to see the heart-shaped sky
- Stand under the 3,000-year-old Jōmon Sugi
- Walk along the old forestry railway beside the river
- Watch for Yakushima macaques and sika deer
Field Radio Protocol
VHF-UHF Communication
Propagation Telemetry
Ridge Line
92%Gorge Floor
18%Sector Relay: Sector Alpha Relay• 12-18 KM Range
Regulatory Compliance
VHF/UHF frequencies are for monitoring and emergency coordination only. Transmitting on these bands may require an Amateur Radio License or regional government permits. Check local telecommunications laws before operation.
Technical Analysis
Total Ascent
+693 m
Total Descent
-692 m
Ruggedness Index
Terrain Roughness Index
Vertical displacement per km. Typical range: 0 (Smooth) to 100+ (Extreme Mountain).
70.6
Tortuosity Index
Route Curviness Index
Ratio of actual path to straight line. Typical range: 1.0 (Direct) to 3.0+ (Switchbacks).
1.51
Gradient Distribution
Surface & Hydrology
Surface Spectrum Analysis
Includes only technical water fords where the vehicle actively enters a stream or riverbed. Permanent bridges are excluded from this count.
Difficulty Analysis
Difficulty is determined by a technical multi-vector analysis of elevation profile, surface quality, and topographic intensity.
Bounding Box (WGS84)
Point Spacing: 18.9 m • Engine: TrailX Precision GPX ANALYTICS v1.0.0
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Plan this trip
Before you go: Jomon Sugi Trail via Arakawa
Best time to go
Apr, May, Oct, Nov
Mount Fuji's official climbing season runs only from early July to early September. For other routes, April to May and October to November are best. The rainy season (June to mid-July) and the typhoons of August and September can disrupt plans.
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