Kinpu-san (金峰山, 2,599 m) stands at the western end of the Okuchichibu range, within Chichibu-Tama-Kai National Park. Its broad upper ridge is crowned by the Gojo-iwa (五丈岩) — a roughly 15-metre stack of enormous granite boulders that is one of the most recognisable summit landmarks in the mountains west of Tokyo. The peak carries a deep Shugendo pilgrimage tradition: its summit shrine is dedicated to Zao-Gongen, and the mountain has been a destination for mountain ascetics since the pilgrimage age. For many hikers it is also one of the easiest Hyakumeizan summits to reach, thanks to a trailhead at the highest drivable pass in Japan.
Why Fukada Chose Kinpu-san
Kinpu-san appears in Kyuya Fukada's Nihon Hyakumeizan. The book is ordered roughly north to south, not by rank — its sequence is not a judgement of quality or difficulty. Neighbouring Mizugaki-yama appears alongside it.
Fukada treated Kinpu-san as the chief peak (盟主) of the western Okuchichibu range — a summit that combines centuries of Shugendo pilgrimage history with a genuinely rugged crown of granite. The Gojo-iwa rising from the summit plateau, and the mountain's long religious tradition, are central to why it earned its place in the hundred.
The Mountain
| Detail | Value |
|---|---|
| Elevation | 2,599 m (8,527 ft) |
| Range | Western Okuchichibu, Chichibu-Tama-Kai National Park |
| Summit landmark | Gojo-iwa (五丈岩), ~15 m granite stack |
| Hyakumeizan | Included (book order is roughly north-to-south, not a ranking) |
| Standard trailhead | Ōdarumi-tōge (大弛峠, 2,365 m) |
| Typical season | June – late November (forest road closed Dec – late May) |
The Routes
Standard Route: Ōdarumi-tōge (大弛峠)
Grade: Easy–Moderate
The standard and easiest way up. Ōdarumi-tōge (2,365 m) is the highest drivable pass in Japan, and from there the trail runs an undulating line over Asahidake to the summit. The net elevation gain to the 2,599 m top is only a few hundred metres, and the ascent takes roughly 2.5–3 hours one way. Forest gives way to the open granite ridge, with the Gojo-iwa appearing dramatically at the summit and wide views across the surrounding mountains. This is among the most accessible Hyakumeizan day hikes — provided the access road is open (see below).
Mizugaki Side: Linking Kinpu-san and Mizugaki-yama
Grade: Moderate–Challenging
From the Mizugaki side, the route climbs Mizugaki-sanso → Fujimidaira-goya → Dainichi-goya → Dainichi-iwa → Sunabarai-no-atama → Chiyo-no-fukiage → Kinpu-goya → summit. It is longer and rougher than the Ōdarumi approach, but it lets hikers combine two Hyakumeizan peaks — Kinpu-san and Mizugaki-yama — often with a night at Fujimidaira-goya as a base.
Okuchichibu Main Ridge Traverse
Grade: Challenging (multi-day)
Kinpu-san sits on the Okuchichibu main ridge (奥秩父主脈). The full traverse links Kinpu-san → Kokushi-ga-take → Kobushi-ga-take → Karisaka-tōge (2,082 m) → Kumotori-yama — roughly 60 km, taking in four Hyakumeizan peaks. This is a serious multi-day undertaking requiring hut or tent stays along the ridge.
Getting There
By public transport:
- For the standard Ōdarumi-tōge side: JR Enzan or Shiomaki Station → Ōdarumi-tōge by Eiwa Kotsu seasonal shared bus/taxi (~90 minutes, reservation required, tel 0553-26-2344).
- For the Mizugaki side: JR Nirasaki Station → Mizugaki-sanso by Kyohoku Kotsu bus.
By car:
- Ōdarumi-tōge (standard Kinpu side): exit the Chuo Expressway at Katsunuma IC or Ichinomiya-Misaka IC, then follow the Kawakami-Makioka forest road (川上牧丘林道) past Otome-ko up to the pass. The Yanagidaira gate and the road beyond it are closed roughly December to late May.
- Mizugaki side: exit at Nirasaki IC, then Pref. Route 23 / National Route 141 toward Mizugaki-sanso.
Mountain Huts
Kinpu-goya (金峰小屋): The mountain hut nearest the summit, located on the northern side roughly 15 minutes below the top.
Fujimidaira-goya (富士見平小屋): The staffed base on the Mizugaki side, used by parties approaching from Mizugaki-sanso.
Flora and Wildlife
Asiatic black bears (ツキノワグマ): Present in the forest approaches, as throughout the Okuchichibu range. Carry a bear bell on the lower, wooded sections. Bear spray is not standard practice on these Honshu trails.
Granite and forest: The lower and mid approaches pass through conifer forest before opening onto the granite ridge near the top. The Gojo-iwa and surrounding rocks form the distinctive summit scenery.
Seasonal Guide
June: Trail and the Ōdarumi forest road open as winter closure lifts. Lingering snow possible high on the ridge early in the month.
July – August: Peak season. The summit and the Ōdarumi route can be busy on summer weekends.
September – November: Generally settled conditions and clear air. Hiking season runs until the forest road closes around late November.
December – late May: The Kawakami-Makioka forest road to Ōdarumi-tōge is closed, removing the easiest access. The mountain becomes a winter undertaking reached on foot, requiring full winter equipment and experience.
Practical Tips for Foreign Visitors
Reserve the Ōdarumi bus. The shared bus/taxi from Enzan/Shiomaki to Ōdarumi-tōge requires a reservation (Eiwa Kotsu, 0553-26-2344). Without a car or a booked seat, the standard trailhead is hard to reach.
Mind the road closure. The single most important access fact is the December–late-May closure of the forest road to Ōdarumi-tōge. Outside the open season, what is normally an easy day hike becomes a serious winter climb.
Do not climb the Gojo-iwa. The ~15 m granite stack at the summit is a landmark to view and photograph, not to scramble up without climbing equipment. The plateau around it is wide and a good place to rest.
Pilgrimage history. The summit shrine is dedicated to Zao-Gongen, the principal deity of Japanese mountain asceticism (Shugendo), with a tradition tied to En-no-Ozunu, the founder of Shugendo. The religious atmosphere is part of the summit experience.
Frequently Asked Questions
Can Kinpu-san be done as a day hike?
Yes. From Ōdarumi-tōge (2,365 m), the highest drivable pass in Japan, the summit is roughly 2.5–3 hours one way over an undulating ridge via Asahidake, with only a few hundred metres of net elevation gain. That makes it one of the most accessible Hyakumeizan day hikes — as long as the access road is open.
Can I reach Kinpu-san without a car?
Yes, but plan ahead. For the standard trailhead, take a train to JR Enzan or Shiomaki Station, then the Eiwa Kotsu seasonal shared bus/taxi to Ōdarumi-tōge (~90 minutes, reservation required, tel 0553-26-2344). For the Mizugaki side, take a train to JR Nirasaki Station and the Kyohoku Kotsu bus to Mizugaki-sanso.
When is the best season to climb Kinpu-san?
Roughly June to late November. The forest road to Ōdarumi-tōge is closed from about December to late May, so the easy approach is unavailable in winter. July and August are peak season and can be busy on weekends, while September through November usually brings settled conditions and clear air. Lingering snow is possible high on the ridge early in June.
Do I need to worry about bears?
Asiatic black bears (ツキノワグマ) live in the forest approaches, as throughout the Okuchichibu range. Carry a bear bell on the lower, wooded sections. Bear spray is not standard practice on these Honshu trails.
Can I combine Kinpu-san with Mizugaki-yama?
Yes. From the Mizugaki side, the route via Mizugaki-sanso and Fujimidaira-goya lets you link Kinpu-san with neighbouring Mizugaki-yama — both Hyakumeizan peaks — often using a night at Fujimidaira-goya as a base. This approach is longer and rougher than the Ōdarumi route.
This guide is part of the Japan's 100 Famous Mountains: Complete Hyakumeizan Guide series.
