Mt. Nikko-Shirane — Kanto's Highest Peak, Mystic Goshiki-numa and Panoramic Views

Trail Overview

Mt. Nikko-Shirane (日光白根山, Nikko-Shiranesan) is a 2,578m volcano straddling the border of Tochigi and Gunma Prefectures and the highest peak in the Kanto region and northward. It holds Hyakumeizan #37 status and is one of the most accessible high alpine destinations in the Nikko–Oze mountain zone.

The mountain’s most striking feature is Goshiki-numa (五色沼), a vibrant cobalt-blue crater lake just below the summit. On a clear day the summit delivers a 360-degree panorama spanning Mt. Hiuchigatake, Mt. Shibutsu, Mt. Nantai, Mt. Tanigawa, Mt. Fuji, and even the Northern Alps on exceptional days.

Access highlight: The Marunuma Kogen Ropeway rises from 1,500m to 2,000m in 15 minutes, making this Kanto’s highest peak surprisingly approachable for fit day-hikers.

Recommended Route: Ropeway Loop (via Mida-ga-ike and Goshiki-numa)

A varied loop from the ropeway top station that visits both the summit and the iconic crater lake.

Course Time

Section	Duration
Ropeway Top Station → Nanashiki-daira Junction	About 30 min
Nanashiki-daira Junction → Mida-ga-ike	About 50 min
Mida-ga-ike → Summit	About 60 min
Summit (rest)	About 30 min
Summit → Goshiki-numa	About 40 min
Goshiki-numa → Futarasan Shrine → Nanashiki-daira	About 50 min
Nanashiki-daira → Ropeway Top Station	About 30 min
Total (loop)	About 5.5 hours (including rest)

Tip: The ascent from Mida-ga-ike to the summit involves steep rocky terrain. The summit itself is a barren volcanic landscape with outstanding views in every direction. Afternoon clouds build quickly in summer — aim to reach the summit before noon.

Alternative Route: Sugenuma Trailhead (No Ropeway)

From the Sugenuma trailhead on the Gunma side, hike via Mida-ga-ike to the summit (about 6 hours round trip). Best suited for those driving and preferring to avoid the ropeway fee.

Access Information

• Nearest Station: JR Joetsu Line, Numata Station
• From Tokyo: Joetsu Shinkansen to Jomo-Kogen Station (about 60 min), or JR Takasaki Line → JR Joetsu Line to Numata Station (total about 2 hours)
• Bus (ropeway): From Numata Station, take a Kan-etsu Kotsu bus to Marunuma Kogen Ski Resort (about 90 min; seasonal service)
• By Car (ropeway): About 60 min from Numata IC on the Kan-etsu Expressway via Route 120. Free parking at Marunuma Kogen Ski Resort

Ropeway details: The ropeway typically operates from mid-June to early November. Round-trip fare is approximately ¥2,500 (subject to change). The top station at 2,000m has a viewing deck, shop, and restrooms — a good place for a final check before hitting the trail.

Convenience Stores, Shops & Restrooms

Convenience Stores

• Numata Station area: 7-Eleven, Lawson, and others. No convenience stores at Marunuma Kogen — stock up in Numata
• Katashina Village: One convenience store in the village, about 30 min before the ropeway base

Shops & Facilities

• Marunuma Kogen Ropeway Base Station: Restaurant and shop available
• Ropeway Top Station (2,000m): Snack bar and small shop (open during season)
• Summit & Goshiki-numa: No shops or water sources

Restrooms

• Ropeway base and top stations: Restrooms available
• Mida-ga-ike: Carry-out toilet booth
• Along the trail: No restrooms (bring a portable toilet)

Highlights

Summer (June–August)

• Mida-ga-ike’s clear water reflecting the snow-streaked white summit — a classic image of Japanese alpine scenery
• Alpine wildflowers including koma-kusa (コマクサ), chinguruma (チングルマ), and koiwakagami (コイワカガミ) bloom along the trail
• 360-degree summit views: Hiuchigatake, Shibutsu, Nantai, Tanigawa, Fuji

Autumn (Late September–October)

• The deep blue of Goshiki-numa set against blazing red and orange foliage is one of the most photographed autumn scenes in the Nikko region
• The barren rocky summit contrasts beautifully with the colorful landscape below
• Early morning mist around Mida-ga-ike creates an ethereal atmosphere

Reaching the Highest Point

• Standing on the highest peak in the Kanto region and beyond — a genuine milestone
• The small summit shrine adds a touch of Japanese mountain tradition
• On exceptional days, views extend to the Southern and Northern Alps

Packing Checklist

• ✅ Waterproof hiking boots (high-cut; rocky summit terrain)
• ✅ Rain jacket and pants
• ✅ Warm mid-layer (summit is around 10°C with strong gusts even in summer)
• ✅ Lunch and trail snacks
• ✅ Water (at least 1.5L; no refill points after the ropeway top station)
• ✅ Headlamp
• ✅ Portable toilet
• ⬜ Trekking poles (useful on the rocky descent)
• ⬜ Ropeway fare (approx. ¥2,500 round trip; cash or card)