Myoko-san (2,454 m) is a prominent volcanic cone on the northern edge of the Myoko-Togakushi highlands in Niigata Prefecture. Its near-symmetrical shape has long made it a landmark of the region. The standard climb from Tsubame Onsen is a steep, sustained route that finishes with chained rock just below the summit, and the mountain is most often paired with neighbouring Hiuchi-yama on a classic two-day traverse.
Why Fukada Chose Myoko-san
Kyuya Fukada included Myoko-san in his book. Its place there reflects the north-to-south geographic sequence of the hundred mountains, not a ranking — its neighbours in the sequence are Naeba-san, Hiuchi-yama, and Takatsuma-yama. Fukada wrote of the mountain as a distinctive volcanic cone of the Japan Sea side of the country, a landmark recognisable from the surrounding plains.
The Mountain
| Attribute | Detail |
|---|---|
| Elevation | 2,454 m (South Peak / Myoko-Ojin, the true summit). The North Peak is ~2,446 m |
| Prefecture | Niigata |
| Volcano status | Officially listed active volcano; last magmatic eruption ~4,200 years ago, no activity in recorded history |
| National park | Myoko-Togakushi-renzan National Park (designated 2015) |
| Hyakumeizan | Included (book order is roughly north-to-south, not a ranking) |
| Typical season | June – October |
The mountain has two true summits. The highest point is the South Peak (南峰 / Myoko-Ojin, 2,454 m); the slightly lower North Peak (北峰, ~2,446 m) holds the panoramic Nihon-iwa viewpoint rock. Myoko-san and the adjacent Hiuchi-yama are frequently climbed together as a two-day traverse, one of the classic combinations in this part of the highlands.
The Routes
Standard Route: Tsubame Onsen ascent
Grade: Challenging
- Trailhead: Tsubame Onsen (燕温泉), a hot-spring village at ~1,150 m
- Distance: ~5.7 km one way
- Elevation gain: ~1,300 m to the 2,454 m summit
- Time: ~4 hours ascent, ~3.5 hours descent (round trip ~8 hours)
- Character: The Tsubame trail climbs through Kita-Jigokudani (北地獄谷), passing the Shomyo and Komyo falls open-air baths, the steep Munatsuki-hatcho pitch, Tengu-do, and Kozenji-ike. Above Kozenji-ike the route crosses steep rock with rope sections and a fixed-chain section before reaching the South Peak (true summit) and the North Peak with the Nihon-iwa viewpoint.
The chains and ropes just below the summit are the crux of the day and demand care, particularly when the rock is wet. There are no huts on this route.
Myoko-san + Hiuchi-yama two-day traverse
Grade: Challenging (2 days)
The classic combination starts not from Tsubame Onsen but from the Sasagamine (笹ヶ峰) trailhead. A typical itinerary is: Sasagamine → Kurosawaike Hütte → Myoko-san (out and back) → Kurosawaike Hütte → Koyaike Hütte → Hiuchi-yama. Hikers overnight at one of the two huts on the plateau between the peaks.
Getting There
From Tokyo / Nagano: Take the Hokuriku Shinkansen to Nagano, then transfer to the Shinano Railway Kita-Shinano Line to Myoko-Kogen Station (妙高高原駅).
To the Tsubame Onsen trailhead: From Myoko-Kogen, continue toward Sekiyama Station (関山駅, on the Echigo-TokiMeki Railway Myoko-Haneuma Line). From Sekiyama the Keinan / Myoko municipal bus runs to Tsubame Onsen (~1,150 m) in about 30 minutes for roughly ¥600, with several services per day year-round.
Note: The Tsubame-shindo / Okura-sawa variant has been impassable since the October 2019 typhoon, per Myoko tourism information.
Mountain Huts
The standard Tsubame Onsen route has no huts. The huts that matter are on the Sasagamine side, used for the Myoko–Hiuchi traverse:
- Kurosawaike Hütte (黒沢池ヒュッテ, ~2,000 m): On the Myoko side of the plateau, used as the base for the out-and-back to the summit.
- Koyaike Hütte (高谷池ヒュッテ, ~2,105 m): On the Hiuchi side, the staging hut for Hiuchi-yama.
Advance booking is advisable in the busy July–August period.
Flora and Wildlife
Asiatic black bears (ツキノワグマ): Honshu's bear is the Asiatic black bear, and the Myoko-Togakushi forests are established habitat. Carry a bell and make noise on the wooded lower slopes. Bear spray is the standard precaution for brown bears in Hokkaido, not for black bears here, but staying alert in dense forest is sensible.
Rock ptarmigan (ライチョウ): The ptarmigan does not live on Myoko-san itself, but neighbouring Hiuchi-yama and Yake-yama (the Kubiki range) mark the northern limit of the species' range in Japan, with only an estimated 20–30 birds on Hiuchi. Hikers on the traverse pass through their habitat. The bird is recognised locally as a symbol of the national park.
National park setting: Myoko-Togakushi-renzan National Park, designated in 2015, protects the forest and alpine zones of the range.
Seasonal Guide
June – July: The trail opens as snowpack recedes. Early season can hold lingering snow on shaded sections.
August: Peak hiking season. The summit panorama is best in the early morning before cloud builds.
September – October: Autumn colour develops on the forested lower slopes. The hiking season winds down through October.
Practical Tips for Foreign Visitors
The chained section is real. Past Kozenji-ike the route crosses steep rock with rope and chain. If you are not comfortable on hands-and-feet terrain, factor this into your plan, and avoid it in heavy rain.
An on-trail hot spring. About an hour up from Tsubame Onsen, the route passes free public open-air baths (the Kogane-no-yu / Shomyo-no-yu area) — a genuine feature of this particular trail.
Plan two days for both peaks. To climb both Myoko-san and Hiuchi-yama, use the Sasagamine trailhead and the plateau huts rather than the Tsubame Onsen route, which is a Myoko-only out-and-back.
Check bus schedules. The Keinan bus from Sekiyama to Tsubame Onsen runs several times a day, but confirm the timetable in advance, as services are limited.
Frequently Asked Questions
Can you climb Myoko-san as a day hike?
Yes. The standard Tsubame Onsen route is a day hike: about 5.7 km one way with ~1,300 m of climbing, roughly 4 hours up and 3.5 hours down, for a round trip near 8 hours. There are no huts on this route, so it is climbed out and back in a single day.
Can you reach the trailhead without a car?
Yes. Take the Hokuriku Shinkansen to Nagano, transfer to the Shinano Railway Kita-Shinano Line to Myoko-Kogen Station, then continue toward Sekiyama Station, where the Keinan / Myoko municipal bus runs to Tsubame Onsen in about 30 minutes for roughly ¥600. The bus runs several services per day year-round, but confirm the timetable in advance as services are limited.
Do I need to book a mountain hut?
Only if you do the two-day traverse. The standard Tsubame Onsen route has no huts. The Myoko–Hiuchi traverse from the Sasagamine trailhead uses Kurosawaike Hütte (~2,000 m) or Koyaike Hütte (~2,105 m) on the plateau, and advance booking is advisable in the busy July–August period.
When is the best time to climb, and when does the snow clear?
The typical season is June to October. The trail opens as the snowpack recedes through June and July, with lingering snow possible on shaded sections early in the season. August is peak hiking season, and September to October brings autumn colour on the lower slopes before the season winds down.
What should I know about bears here?
Honshu's bear is the Asiatic black bear, and the Myoko-Togakushi forests are established habitat. Carry a bell and make noise on the wooded lower slopes. Bear spray is the standard precaution for brown bears in Hokkaido rather than for black bears here, but staying alert in dense forest is sensible.
This guide is part of the Japan's 100 Famous Mountains: Complete Hyakumeizan Guide series.
