Mt. Hiragatake (ひらがたけ, 2,141m) straddles the border of Uonuma City, Niigata and Minakami Town, Gunma in the Echigo-Sanzan Tadami Quasi-National Park, selected in Kyuya Fukada’s One Hundred Mountains of Japan. A remote peak famed for its vast summit wetlands, scattered tarns and the iconic Tamago-ishi “Egg Stone”, widely regarded as “the toughest day-hike of the Hyakumeizan”.
The flat, plateau-like summit hosting Himenoike Pond, Tamago-ishi, and the summit wetlands gives the mountain its name (“Hira” = flat). The Takanosu course (currently the only realistic route)・Expert ★★★★★・distance ~21 km・elevation gain 1,300 m・action time ~12 hours as a single ultra-long day hike, with no mountain huts or tent sites on the trail.
Access to the trailhead
- [Outbound] Tokyo / Osaka → Urasa Station (JR Joetsu Shinkansen)
- [Outbound / Return] Urasa Station ⇔ Takanosu trailhead (Minamiechigo bus + Okutadami ferry + Aizu bus / private car)
- Takanosu course, Seishiro Lodge, suggested plans
Course time (Takanosu course, day hike, Expert, ~12 hours)
Takanosu trailhead (840 m) → (2:30) → Shimo-Daikura-yama (1,604 m) → (1:30) → Daikura-yama (Daikura-shimizu) → (2:00) → Shirasawa-shimizu → (1:30) → Ike-no-Take / Himenoike (2,080 m) → (0:30) → Mt. Hiragatake summit (2,141 m) → (0:40) → Tamago-ishi → descent (3:30) → Takanosu trailhead
1. [Outbound] Tokyo / Osaka → Urasa Station (JR Joetsu Shinkansen)
Urasa Station (JR Joetsu Shinkansen) is the gateway for Mt. Hiragatake. From Tokyo Station, take the JR Joetsu Shinkansen Toki approx. 1 hr 20 min・¥7,810 (reserved). From Osaka, via Tokyo, approx. 4 hr 30 min・¥17,000. From overseas, use Niigata Airport (flights from Tokyo / Osaka / Sapporo / Fukuoka), airport limousine bus to Niigata Station ~25 min・¥420, then JR Joetsu Shinkansen to Urasa ~50 min・¥5,720. Reaching Ginzandaira / Takanosu trailhead by public transport alone is effectively impossible (see below); private car or pre-overnight at Ginzandaira / Oyu Onsen + taxi is the standard.
JR / airport reference :
Tokyo Stn → Urasa Stn : JR Joetsu Shinkansen Toki ~1 hr 20 min・¥7,810 (reserved)
Urasa Stn → Koide Stn : JR Joetsu Line ~10 min・¥210 (bus transfer)
Osaka Stn → Urasa Stn : JR via Tokyo ~4 hr 30 min・~¥17,000
Niigata Airport → Urasa Stn : via Niigata Stn ~1 hr 30 min
Reference : JR East ｜ Niigata Tourism Association — Mt. Hiragatake / Takanosu trailhead
Contact : JR Urasa Station ☎025-777-3104
2. [Outbound / Return] Urasa Station ⇔ Takanosu trailhead (Minamiechigo bus + Okutadami ferry + Aizu bus / private car)
Public transport to the Takanosu trailhead (840 m) requires Urasa Stn → Minamiechigo Kanko bus to Okutadami Dam (~1 hr 20 min・¥1,250) → Okutadami Kanko ferry to Oze-guchi (~40 min・¥1,150) → Aizu bus to Hiragatake-tozanguchi (~5 min・¥380), a three-leg transfer, summer-only, with the ferry and buses running just 1–2 times per day — making a same-day round trip with a 12-hour itinerary effectively impossible. Private car (Kan-Etsu Expressway Uonuma IC → Okutadami Silver Line → Ginzandaira → Route 352, ~1 hr to Takanosu trailhead, parking ~20 spaces / free) or pre-overnight at Ginzandaira / Oyu Onsen + taxi is realistic.
Operating period : Minamiechigo bus, Okutadami ferry, Aizu bus all operate during the summer climbing season only (typically late June — October). Route 352 Ginzandaira–Takanosu section is closed for winter from late October to early June
Travel time : Urasa Stn → Takanosu trailhead (public transport combined) approx. 3 hr+
Fare : Public transport combined ~¥2,780
Frequency : Minamiechigo bus / ferry / Aizu bus all 1–2 services per day
Urasa Stn → Okutadami Dam → Hiragatake-tozanguchi (public-transport combined, summer-only, hiker excerpt)
| Urasa Stn dep | Okutadami Dam arr | Ferry dep | Oze-guchi arr | Hiragatake-tozanguchi arr |
|---|---|---|---|---|
| ~8:25 (Minamiechigo bus) | ~9:45 | ~10:00 (Okutadami ferry) | ~10:40 | ~11:00 (Aizu bus, 5 min) |
| ※ Cannot fit a 12-hour itinerary in a single day — pre-overnight mandatory |
Hiragatake-tozanguchi → Urasa Stn (public-transport combined, return, summer-only)
| Hiragatake-tozanguchi dep | Oze-guchi dep (ferry) | Okutadami Dam arr | Urasa Stn arr |
|---|---|---|---|
| ~13:30 (Aizu bus) | ~14:00 | ~14:40 | ~16:30 |
Note : Operating periods and timetables change yearly; always pre-confirm with Minamiechigo bus, Okutadami ferry, and Aizu bus official sources. Private car or pre-overnight at Ginzandaira + taxi is the standard. After descent, Ginzandaira Onsen “Hakugin no Yu” (day-use bath ¥650) or Koma-no-Yu Onsen is recommended.
Reference : Minamiechigo Kanko Bus Official ｜ Niigata Tourism — Mt. Hiragatake / Takanosu trailhead
Contact : Minamiechigo Kanko Bus (Muikamachi) ☎025-773-2573 / Okutadami Kanko Ferry ☎025-795-2750 / Aizu Bus ☎0242-22-5560 / Uonuma Tourism Assoc. ☎025-792-7300
3. Takanosu course, Seishiro Lodge, suggested plans
About Mt. Hiragatake
At 2,141 m, straddling Uonuma City (Niigata) and Minakami Town (Gunma), within the Echigo-Sanzan Tadami Quasi-National Park. Selected in Kyuya Fukada’s One Hundred Mountains of Japan. The flat plateau-like summit hosts Himenoike Pond, Tamago-ishi (Egg Stone), and the summit alpine wetlands, earning it the reputation of “the toughest day-hike of the Hyakumeizan”. With the former Nakanoki taxi shuttle now discontinued, the Takanosu course (12-hour day-hike) is the sole realistic option.
Trail overview (Takanosu course, currently the only realistic route)
- Takanosu course (Niigata side, Expert, ~12 hr, day hike) : Takanosu trailhead → Shimo-Daikura-yama → Daikura-yama → Shirasawa-shimizu → Ike-no-Take / Himenoike → Mt. Hiragatake summit → Tamago-ishi round trip; narrow ridges and continuous steep climbs
- (Reference) Nakanoki course: Currently unavailable — the Nakanoki forest-road taxi shuttle has been discontinued (formerly operated only for Seishiro Lodge overnight guests)
Mountain huts / hot springs (2026 information)
– No mountain huts or tent sites on the trail: Tent camping in the summit wetlands is banned by Uonuma City guidance (except emergencies)
– Seishiro Lodge (near Takanosu trailhead, ☎090-2558-0028): 1 night with 2 meals ¥8,500~, room-only ¥6,000~. Irregular schedule since 2025; phone confirmation in advance is required. Nakanoki shuttle no longer operated
– Ginzandaira Onsen Kozanso (☎025-795-2306): Climbing inn at Ginzandaira, a base for hikers. No shuttle service; private car assumed
– Ginzandaira Onsen “Hakugin no Yu” (day-use bath ¥650, post-descent) / Koma-no-Yu Onsen (secluded hot spring)
Climbing season / flora: Mid-June to late October. July: nikko-kisuge (day lily), himesayuri lily, watasuge (cotton grass) mass colonies in the summit wetlands. August: iwashobu, tateyamautsubogusa. Late September to October: alpine grass autumn colors turn the summit wetlands golden; surrounding beech forests color. Snow remains on the ridge until early June.
Cautions
– Nakanoki taxi shuttle discontinued: Only the Takanosu course (12-hour day hike) is operational
– 4:00 AM pre-dawn start is standard: 12-hour itinerary; headlamp essential
– Tent camping banned: Summit wetlands tent camping banned by Uonuma City guidance (except emergencies)
– No toilets — portable toilets mandatory: No toilets on the trail; nature protection
– Water sources may dry seasonally: Daikura-shimizu, Shirasawa-shimizu, Hana-shimizu; carry at least 2 L
– Route 352 winter closure: Late October to early June
Emergency contacts / inquiries
- Uonuma City Tourism Assoc.: ☎025-792-7300 / Minakami Town Tourism Assoc.: ☎0278-62-0401
- Minami-Uonuma Police Station (climbing notification / mountain rescue): ☎025-770-9110
- Seishiro Lodge: ☎090-2558-0028 / Ginzandaira Onsen Kozanso: ☎025-795-2306
- Minamiechigo Kanko Bus: ☎025-773-2573 / Okutadami Kanko Ferry: ☎025-795-2750 / Aizu Bus: ☎0242-22-5560
Suggested plans (Takanosu course, 1 night 2 days, private car / pre-overnight, recommended)
- 1 night 2 days, Ginzandaira pre-overnight + Takanosu day hike (recommended, standard): Day 1 Tokyo → Urasa Stn → taxi (~¥6,000) or pickup → Ginzandaira Onsen Kozanso overnight. Day 2 private car or inn pickup 3:30 dep → Takanosu trailhead 4:00 → Shimo-Daikura 6:30 → Daikura 8:00 → Himenoike 11:30 → summit 12:00 → Tamago-ishi → descent → Takanosu 16:00 → bath → return
- 2 nights 3 days, using Seishiro Lodge (operating days require confirmation): Day 1 Urasa Stn → Seishiro Lodge overnight. Day 2 Seishiro Lodge 3:30 dep → Takanosu → summit → descent → Seishiro Lodge second night. Day 3 return
Reference : Seishiro Lodge Official ｜ Niigata Tourism Association — Mt. Hiragatake
Photo by Qwert1234
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