Yakushima is not a normal island. Rising from the ocean 60 km south of Kyushu, this UNESCO World Heritage island is wrapped in a cedar forest whose oldest trees predate the European Renaissance — the famous Jōmon Sugi is at minimum 2,170 years old, by some estimates far older. At its heart stands Miyanoura-dake (宮之浦岳, 1,936 m), the highest peak in Kyushu and the southernmost of Japan's Hundred Famous Mountains. You can climb it as a long day hike from the Yodogawa trailhead, or fold it into a two- to three-day traverse that also takes in Jōmon Sugi. This guide sorts out the routes, the trailhead access (the part most people get wrong), and the island's notorious weather.
How long does it take to climb Miyanoura-dake?
Why Fukada Chose Miyanoura-dake
Kyūya Fukada included Miyanoura-dake in Nihon Hyakumeizan. The book runs roughly north to south, and as the southernmost of the hundred peaks, Yakushima's summit naturally falls at the end of that sequence; its place reflects geography, not a ranking. But Fukada clearly felt the island was an outlier in every sense — the most ecologically extraordinary and the most unlike any other mountain on the list, a place of near-permanent rain and mist where the forest looks older than human memory.
Yakushima's forest also shaped a film many foreign hikers know: Hayao Miyazaki drew on the island — especially the moss-draped Shiratani Unsuikyō ravine — as the visual reference for the ancient woods of Princess Mononoke (1997). Walking it, the resemblance is immediate.
The Mountain
| Elevation | 1,936 m (6,352 ft) — highest in Kyushu |
| Prefecture | Kagoshima (Yakushima island) |
| UNESCO status | Natural World Heritage Site (1993) |
| Hyakumeizan | Included — the southernmost of the hundred (book order is roughly north-to-south, not a rank) |
| Rainfall | Among the wettest places in Japan — parts exceed 10,000 mm/year |
| Typical season | Year-round; March–November most accessible |
The island's interior is effectively rainforest, giving way to subalpine scrub above ~1,500 m. The ridge around Miyanoura-dake is genuinely dramatic — huge granite tors, twisted dwarf pines (haimatsu), and, on the rare clear day, views over the East China Sea. The summit ridgeline is part of the Okudake (奥岳) range; the official route information is published by the Ministry of the Environment's Yakushima World Heritage Conservation Center.
The Routes
| Option | Shape | Note |
|---|---|---|
| Yodogawa day hike | Out-and-back, ~16–20 km, 9–11 h | Summit only; year-round car access to the trailhead |
| 2–3 day traverse | Yodogawa → summit → Jōmon Sugi → Shiratani/Arakawa | Both highlights in one trip; 1–2 hut nights; ends at a different trailhead |
Option 1: Yodogawa day hike (standard summit route)
Grade: Challenging — a long day on wet, rooty ground
From the Yodogawa trailhead (淀川登山口) the trail climbs through dense, mossy cedar forest, passes the Hananoego marsh (花之江河, ~1,640 m) — Japan's southernmost high-altitude bog — and crosses open granite over Kurio-dake (栗生岳, 1,867 m) to the summit. A side trail leads to Kuromi-dake (黒味岳), a worthwhile viewpoint detour. Out and back: roughly 16–20 km, 9–11 hours. Start before dawn.
Option 2: 2–3 day traverse (summit + Jōmon Sugi)
Grade: Challenging — sustained, with hut nights
To link the peak with the famous cedar, traverse the island:
- Day 1: Yodogawa trailhead → Hananoego → Miyanoura-dake summit → descend to Shin-takatsuka Hut (新高塚小屋) for the night.
- Day 2: Shin-takatsuka → Jōmon Sugi → out via Shiratani Unsuikyō (the "Mononoke forest") or the Arakawa trailhead.
A three-day version adds the neighbouring Nagata-dake (永田岳, 1,886 m), Yakushima's jagged second peak, off the main ridge. The traverse ends at a different trailhead from where it starts — plan transport for that.
Getting to Yakushima
Yakushima is an island; you arrive by boat or plane.
Jetfoil (Toppy/Rocket) — recommended: high-speed hydrofoil from Kagoshima to Miyanoura port, ~1 h 50 m – 2 h 30 m, around ¥14,000 one way (2026; a fuel surcharge is included and was raised in May 2026 — confirm at booking). Rough seas can cancel service; keep a flexible schedule.
Car ferry — cheaper, slower: ~4 hours, ~¥6,500 one way (2nd class, Ferry Yakushima 2), 1–2 daily.
Plane: Kagoshima Airport → Yakushima Airport (Japan Air Commuter, ~35 min); often comparable to the jetfoil if booked ahead.
Access to the Trailheads
The two trailheads have completely different access rules — get this right, it shapes the whole plan.
| Trailhead | For | Access |
|---|---|---|
| Yodogawa (淀川登山口) | The summit | Car/taxi year-round; few parking spaces (arrive very early). No direct bus — nearest stop Kigen-sugi, ~30 min below |
| Arakawa (荒川登山口) | Jōmon Sugi / traverse exit | Private cars banned Mar 1–Nov 30; mandatory shuttle from the Yakusugi Museum, ¥2,000 round trip |
Conservation fee (協力金): ¥1,000 for a day hike, ¥2,000 for an overnight, per person — paid at the Yakusugi Museum (屋久杉自然館) in Anbo, where the Arakawa shuttle departs. From December to February the Arakawa ban lifts and private cars may drive in, but the road is narrow and conditions can be severe.
Mountain Huts
All the mountain huts here are free, unstaffed, first-come-first-served — no reservation, no fee. Bring your own pad and bag, and arrive by mid-afternoon in season as they fill.
| Hut | Water | Use |
|---|---|---|
| Yodogawa (淀川小屋, ~1,380 m) | Yes — source by the hut | For a pre-dawn start just past the Yodogawa trailhead |
| Shin-takatsuka (新高塚小屋, ~1,460 m) | Yes — source nearby | Standard traverse overnight, between summit and Jōmon Sugi |
| Takatsuka (高塚小屋, ~1,330 m) | No — dry; fill up first | Small hut just above Jōmon Sugi; carry water in |
Don't confuse the two "Takatsuka" huts: Shin-takatsuka (the usual overnight) has water nearby, while the smaller Takatsuka hut by Jōmon Sugi has none — fill up at the last source before you reach it. There are no huts at the summit.
Flora and Wildlife
Yakushima macaques (ヤクザル): an endemic subspecies, smaller and stockier than mainland macaques, completely habituated to hikers — you will likely pass within a few metres of a troop. Do not feed them; they will mob you and turn aggressive.
Yakushima deer (ヤクシカ): another endemic subspecies, also smaller than mainland deer, grazing openly and unafraid, often even on the upper ridge.
No bears: Yakushima has no bears — one of the few serious mountain hikes in Japan where you don't need a bear bell. The island was too small and isolated for bears to colonise.
Birds: the Yakushima varied tit (ヤクシマヤマガラ), an endemic subspecies, is common in the forest, along with the Ryukyu robin (Akahige, アカヒゲ) — the island rewards birdwatchers well before the summit.
The ancient forest: below ~1,000 m the sugi cedar forest holds trees from hundreds to thousands of years old, every surface carpeted in moss; higher up it gives way to rhododendron and then open granite. The transition is the whole magic of the place.
Weather and Conditions
Yakushima makes its own weather off the warm Kuroshio Current; rain can arrive in minutes.
- Rain: plan for it every day, every season — proper waterproofs are not optional, and dry bags for electronics are essential.
- Best conditions: May–June (before the rainy season) and October–November are the most settled. July–August is hot, humid and crowded low down.
- Winter (Dec–Feb): the summit can be snowy and icy above ~1,500 m; quietest, but genuine alpine conditions.
Check the JMA forecast for southern Kagoshima and the Yakushima visitor-centre forecast specifically.
Practical Tips for Foreign Visitors
- Book the jetfoil early. High season (July–August, Golden Week, New Year) sells out weeks ahead.
- Book island lodging before arriving. Miyanoura village has guesthouses, minshuku and a few hotels — don't assume vacancy in peak season.
- The Jōmon Sugi decision. Many come only for the cedar and skip the summit — a valid choice; the tree alone is extraordinary. Want both? The traverse does it in one trip — add a buffer day for the weather.
- Footwear and grip. Wet roots and granite are the real hazard here. Aggressive-grip boots or trail shoes, plus trekking poles, matter more than on a dry alpine route.
- Expect cloud. Most days the upper mountain is in mist; a clear summit is genuine luck. The forest makes the trip worthwhile regardless.
This guide is part of the Japan's 100 Famous Mountains: Complete Hyakumeizan Guide series. Official route info: the Ministry of the Environment Yakushima World Heritage Conservation Center. For maps, download YAMAP and search "宮之浦岳" before leaving Wi-Fi.
