Mt. Aizu-Komagatake (会津駒ヶ岳)

Mt. Aizu-Komagatake (会津駒ヶ岳, 2,133 m) is a peak in Hinoemata Village, Fukushima Prefecture, within Oze National Park, and is counted among the 100 Famous Mountains of Japan.

The summit area features Koma-no-Ōike (Koma Pond) and a sprawling alpine wetland — known as “the Sky Paradise” — full of pond-tarns and seasonal blooms (Hakusan-kozakura, Nikkō-kisuge, chinguruma). A gentle one-hour ridge walk over boardwalks leads to Mt. Chūmon (2,060 m), and the broad ridge-top wetland is unforgettable. Mt. Aizu-Komagatake is one of the Tōhoku region’s premier flower mountains.

The trailhead is at Takisawa (1,090 m, about 30 min on foot from the Komagatake-Tozanguchi bus stop). Access is via the Tobu–Yagan–Aizu Railway lines to Aizu-Tajima Station, then by Aizu Bus.

*Timetable last checked: May 20, 2026

How to access the trailheads

1. [Outbound] Asakusa / Shinjuku → Aizu-Tajima Station → Komagatake-Tozanguchi (Tobu + Yagan + Aizu Railway + Aizu Bus)
2. [Outbound] Komagatake-Tozanguchi → Takisawa Trailhead (about 30 min on foot)
3. [Return] Komagatake-Tozanguchi → Aizu-Tajima Station → Asakusa / Shinjuku

Reference course time (Takisawa – Aizu-Komagatake – Chūmon round trip, ~7 h 30 min, 12 km, ~1,043 m gain)

Takisawa Trailhead (1,090 m) → (1:30) → water source → (1:00) → Koma-no-Ōike (2,060 m, Koma-no-Koya) → (0:30) → Aizu-Komagatake summit (2,133 m) → (1:00) → Mt. Chūmon (2,060 m) → (1:00) → Aizu-Komagatake → (0:20) → Koma-no-Koya → (1:30) → Takisawa

Reference course time (Takisawa – Aizu-Komagatake out-and-back, ~6 h 30 min, 10 km, beginner – intermediate)

Takisawa → (1:30) → water source → (1:00) → Koma-no-Koya → (0:30) → Aizu-Komagatake summit → (1:30) → Koma-no-Koya → (1:30) → Takisawa

1. [Outbound] Asakusa / Shinjuku → Aizu-Tajima Station → Komagatake-Tozanguchi (Tobu + Yagan + Aizu Railway + Aizu Bus)

From Tobu Asakusa Station, take the Tobu Kinugawa Line / Yagan Railway / Aizu Railway to Aizu-Tajima Station (about 3 h via the Revaty Aizu Ltd. Express). From Shinjuku, the through-running Revaty Aizu Ltd. Express takes about 3 h 40 min. From Aizu-Tajima, the Aizu Bus to Komagatake-Tozanguchi takes about 1 h 30 min; 4 trips/day, operating 1 May – 31 October only.

Train access summary:
Asakusa → Aizu-Tajima: Revaty Aizu Ltd. Express, about 3 h 12 min, ¥4,460 (reserved)
Shinjuku → Aizu-Tajima: JR/Tobu through-running Revaty Aizu, about 3 h 40 min, ¥4,810 (reserved)

Operating period: Aizu Bus 1 May – 31 October (suspended in winter; trips marked ● run only 23 May – 25 October)
Travel time: Aizu-Tajima → Komagatake-Tozanguchi about 1 h 30 min
Fare: Aizu-Tajima → Komagatake-Tozanguchi approx. ¥2,500; Aizu-Tajima → Hinoemata (Michi-no-Eki) ¥2,330
Frequency: 4 trips/day (the ●6:30 early-morning service runs only 23 May – 25 October)

Asakusa / Shinjuku → Aizu-Tajima Station (Tobu + Yagan + Aizu Railway)

Aizu-Tajima Station → Komagatake-Tozanguchi (Aizu Bus, 1 May – 31 October)

Note: A separate early-morning service runs only 23 May – 25 October (Hinoemata ●6:30 → Komagatake-Tozanguchi ●6:32). See the Aizu Bus official site for details.

References: Aizu Bus official | Tobu Railway | Aizu Railway
Contact: Aizu Bus Tajima Office ☎0241-62-0134

2. [Outbound] Komagatake-Tozanguchi → Takisawa Trailhead (about 30 min on foot)

From the Komagatake-Tozanguchi bus stop, walk about 30 min (~2 km, gentle uphill paved road) to the Takisawa Trailhead (1,090 m), or drive about 5 min (~20 free parking spaces, fills up quickly). The trailhead has a wooden staircase (the namesake of “Takisawa”), a sign, and toilets; there are no shops.

Travel time: 30 min on foot (2 km) / 5 min by car
Note: Hinoemata is a remote Oku-Aizu village. Convenience stores are only in the village center. Stock food and water at the Michi-no-Eki Oze-Hinoemata (near the Komagatake-Tozanguchi bus stop). Many hikers also take advantage of the inns in Hinoemata Onsen for a pre-hike overnight stay.

References: Oze Hinoemata Onsen Tourism Association | Koma-no-Koya Access
Contact: Oze Hinoemata Onsen Tourism Association ☎0241-75-2432

3. [Return] Komagatake-Tozanguchi → Aizu-Tajima Station → Asakusa / Shinjuku

After descending, walk about 30 min from Takisawa back to the Komagatake-Tozanguchi bus stop. The last bus from Komagatake-Tozanguchi is 16:42 (or ●17:52 only 23 May – 25 October), so if you also walk out to Mt. Chūmon, plan to stay overnight at Koma-no-Koya.

Operating period: Aizu Bus 1 May – 31 October (suspended in winter)
Travel time: Komagatake-Tozanguchi → Aizu-Tajima about 1 h 38 min
Fare: Komagatake-Tozanguchi → Aizu-Tajima approx. ¥2,500
Frequency: 3-4 trips/day (the ●17:52 evening service runs only 23 May – 25 October)

Komagatake-Tozanguchi → Hinoemata → Aizu-Tajima (Aizu Bus)

Aizu-Tajima Station → Asakusa / Shinjuku (Aizu Railway + Yagan Railway + Tobu Railway)

Recommended connection: Komagatake-Tozanguchi 16:42 → Aizu-Tajima 18:20 (you may not catch the 17:48 onward train). For a reliable same-day return, take Komagatake-Tozanguchi 11:02 → Aizu-Tajima 12:40 → Asakusa 16:16 / Shinjuku 17:09 (means you need to descend in time), or — most realistically — stay one night at Koma-no-Koya and descend the next morning.

References: Aizu Bus official
Contact: Aizu Bus Tajima Office ☎0241-62-0134

Trail overview, Koma-no-Koya hut, and regulations

Takisawa – Aizu-Komagatake – Chūmon round trip (intermediate, ~7 h 30 min, 12 km, ~1,043 m gain)
From the wooden staircase at Takisawa Trailhead (1,090 m), climb steeply through forest for 1 h 30 min → water source (3 min off-trail downhill, round-trip 6 min) → beech and Erman’s birch forest for 1 h → emerge onto the alpine wetland to Koma-no-Ōike (2,060 m, Koma-no-Koya) → 30 min to the Aizu-Komagatake summit (2,133 m) → 1 h boardwalk ridge walk across alpine wetland to Mt. Chūmon (2,060 m, end of the wetland). Descend by the same route. The summit itself is grassy with limited views; the best panoramas are from the Chūmon ridge.

Takisawa – Aizu-Komagatake out-and-back (beginner – intermediate, ~6 h 30 min, 10 km)
Same as above, but turn back at the Aizu-Komagatake summit without continuing to Mt. Chūmon. Even fit beginners can day-trip this version. The route takes 7-8 hours in the lingering-snow season (May – early June).

Koma-no-Koya hut (just below the summit, 2,060 m, 2026 information)

• Operating period: 25 April (Sat) – 31 October (Sat) overnight stays in 2026.
• Reservations: open from 1 April 07:00 via phone (☎080-2024-5375) or email (info@komanokoya.com). Early reservations are accepted from 1 March only for guests for whom Koma-no-Koya is essential to the schedule. Fully reservation-based, limited capacity.
• Facilities: self-catering (lit by lamps only, no electricity); bedding provided, cook-space available, blankets supplied. No meals served — bring your own food. Water source (5 min below the hut, flowing). Toilet provided (tip-jar fee).
• Rate: approx. ¥4,500 per night (self-catering). Check the official site for current details.
• Official: Koma-no-Koya, Oze National Park

Trail conditions, seasons, snow

• Lingering-snow season (May – early June): heavy snow above 1,500 m, especially around Koma-no-Koya. Six-point crampons essential; route-finding requires care (follow red tape).
• Summer best (late June – August): Hakusan-kozakura blooms in early July → Nikkō-kisuge and chinguruma → August’s wetland is a sea of green. The Mt. Chūmon boardwalk ridge is the spectacle.
• Autumn (September – October): peak colors early to mid-October; Koma-no-Koya closes on 31 October.
• Water: there is a water source 1 h 30 min up from Takisawa (6 min round trip off-trail), and another at Koma-no-Koya (free flowing water). Refill at both — carry at least 2 L on hot summer days.

Regulations and trail information

• No private-vehicle regulation. Free parking (about 20 spaces) at Takisawa Trailhead; fills up in summer and on long weekends.
• The trail lies within Oze National Park. Plant collection is prohibited. Stay on the boardwalks across the wetlands (no off-trail walking).
• Bear sightings have been reported, particularly near the water source and the wetland. Carrying a bear bell is recommended.

Emergency contacts

• Koma-no-Koya (trail info / emergencies): ☎080-2024-5375
• Oze Hinoemata Onsen Tourism Association: ☎0241-75-2432
• Hinoemata Village Office: ☎0241-75-2311
• Minami-Aizu Police Station (mountain rescue): ☎0241-62-0110
• Fukushima Pref. Police Alpine Unit: ☎024-522-2151

Recommended plans

• 2-day Koma-no-Koya overnight, Chūmon out-and-back (classic): Asakusa 7:30 → Aizu-Tajima 10:45 → Aizu Bus 11:00 → Komagatake-Tozanguchi 12:30 → Takisawa 13:00 → Koma-no-Koya 17:00 (overnight) → next morning summit + Chūmon round trip (3 h) → 11:02 Komagatake-Tozanguchi → Asakusa 16:16.
• Strenuous day trip out-and-back (fit hikers only): Asakusa 6:30 → Aizu-Tajima 9:42 → Aizu Bus 10:00 → Komagatake-Tozanguchi 11:30 → Takisawa 12:00 → Aizu-Komagatake out-and-back (~6 h 30 min) → 18:30 Komagatake-Tozanguchi → no bus, stay overnight at Michi-no-Eki or take a taxi. Day-tripping is tight — staying at Koma-no-Koya is strongly recommended.
• Hinoemata Onsen pre-hike overnight + early-morning bus: Use the early-morning bus that runs 23 May – 25 October (Komagatake-Tozanguchi 6:32 arrival) for an unhurried day trip including Mt. Chūmon. Book a Hinoemata Onsen inn via the village tourism association.

References: Oze Conservation Foundation – Aizu-Komagatake to Chūmon | Oze National Park (MoE)

Photo by Raita Futo