Mt. Kumotori — Tokyo's Highest Peak

Trail Overview

Mt. Kumotori (雲取山, Kumotori-yama) stands at 2,017m at the junction of Tokyo, Saitama, and Yamanashi Prefectures. It is Tokyo’s highest peak and Hyakumeizan No. 41.

Located at the eastern end of the Okuchichibu range, the summit offers views of Mt. Fuji, the Southern Alps, and the surrounding Okuchichibu mountains. It provides a genuine mountain experience while technically remaining within Tokyo.

The day hike via the Kamosawa Route covers about 22km with 9–10 hours of walking, making it a popular challenge for strong hikers.

Hiking Registration

Mt. Kumotori requires hikers to submit a registration form. You can submit through:

• Trailhead: Registration posts at Kamosawa trailhead and Kosode-goshi parking area
• Online: Via the “Compass” system (Japan Mountain Guides Association)
• Apps: YAMAP, Yamareco, and other hiking apps support online submission

Recommended Route: Kamosawa Route

The most popular and well-established route, following a long but well-marked ridge trail.

Course Time

Section	Duration
Kamosawa bus stop → Kosode-goshi	About 30 min
Kosode-goshi → Dokoro	About 60 min
Dokoro → Nanatsu-ishi Koya junction	About 50 min
Nanatsu-ishi Koya junction → Buna-zaka	About 30 min
Buna-zaka → Former Okutama Koya site	About 30 min
Former Okutama Koya site → Mt. Kumotori summit	About 50 min
Total (one way)	About 4.5–5 hours
Descent	About 3.5–4 hours
Round trip total	About 9–10 hours

Tip: A bypass trail around Mt. Nanatsu-ishi saves about 20 minutes, but if time permits, the summit of Mt. Nanatsu-ishi offers excellent views and is worth the detour.

Access Information

• Train: JR Ome Line to Okutama Station (about 2 hours from Shinjuku via Chuo Line rapid and Ome Line)
• Bus: Nishi Tokyo Bus from Okutama Station to Kamosawa, about 35 min
• Car: About 1.5 hours from Ome IC on the Ken-O Expressway to Kosode-goshi parking area. Free parking (about 30 spaces, fills early on weekends)

Note: Buses to Kamosawa run infrequently. For day hikes, take the first bus of the day and pay attention to the last return bus schedule.

Convenience Stores, Shops & Restrooms

Convenience Stores (within 5 min of trailhead)

• Seven-Eleven near Okutama Station (stop by before boarding the bus)
• No convenience stores or shops at Kamosawa — buy all supplies at the station

Shops & Teahouses

• Nanatsu-ishi Koya: Drinks and light meals available
• Kumotori-sanso: Drinks and cup noodles available

Restrooms

• Kamosawa bus stop (public restroom)
• Nanatsu-ishi Koya (donation-based)
• Kumotori-sanso

Note: There are no restroom facilities for about 3 hours between Kamosawa and Nanatsu-ishi Koya. Use the facilities before starting.

Mountain Hut Information

Hut	Capacity	Season	Notes
Kumotori-sanso	About 200	Year-round	15 min below summit, meals available, reservation recommended
Nanatsu-ishi Koya	About 15	Year-round	Tent sites available, drinks and light meals sold

Highlights

🌸 Spring (April–May)

• Fresh green beech forests along the Okutama ridge
• Spring wildflowers including katakuri and iwauchiwa

☀️ Summer (June–August)

• Cool hiking above 2,000m
• Lush green scenery along the Ishi-one (Stone Ridge)

🍁 Autumn (October–November)

• Golden larch foliage near the summit
• Autumn colors with Mt. Fuji in the background
• Clear air provides excellent visibility

Packing Checklist

• ✅ Hiking shoes (comfortable fit is essential for 22km)
• ✅ Water (at least 1.5L)
• ✅ Rain gear (separates recommended)
• ✅ Warm layers (summit is 12°C+ cooler than the base)
• ✅ Headlamp (essential for early morning starts)
• ✅ Energy food/snacks (frequent refueling on the long route is important)
• ✅ Map and compass
• ⬜ Trekking poles (very effective for reducing fatigue on long distances)
• ⬜ Athletic tape (for blister prevention)