Manza Prince Hotel

万座プリンスホテルまんざプリンスホテル

Lodging

Manza Onsen

Kanto·Gunma

+81 279-97-1111 princehotels.co.jp

Day Use

Yes

11:00–16:00

last entry at 15:00

¥1,500

¥750 for children

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Bathing Arrangements

Private BathYes

A private bath you can reserve for yourself or your group

Mixed BathingYes

Shared bathing area for all genders

A bathing garment (yuami-gi, 湯浴み着) or swimsuit is required for mixed bathing.

Policies & Services

TattooNo

Allows entry with visible tattoos

KidsYes

Welcomes children and families

DiningYes

A restaurant or dining room open to visitors, not only meals for overnight guests

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels to rent or borrow at the desk

ParkingYes

On-site or nearby parking available

Water treatment

Treated and recirculated

from Article 18 disclosure

Added water
Yes
Reheated
No
Recirculated
No
Disinfected
No
Bath additives
No

万座温泉姥湯(湯畑)

Manza Onsen Ubayu (Yubatake)

Operated by · 万座プリンスホテル

酸

Acidic

+ 含硫黄泉 · Sulfate

Hot source · 72°CUltra-acidicSulfur-richHigh silica

Known good for

Skin conditionsatopic skin, eczema
Circulationtired legs
Aches & jointsstiff shoulders

Sensitive-skin cautionbroken or dry skin

An acidic, sulfur-bearing sodium-magnesium sulfate spring. At pH 2.4 the water is sharp enough to prickle on contact, and free hydrogen sulfide runs to 108.1 mg/kg — the unmistakable rotten-egg note hangs over the baths. The source emerges at 72.3 °C, among Japan's hottest, so it is diluted with water to bring the tubs down to bathing temperature; nothing is recirculated and no disinfectant is added, the posting noting that the water's own strong acidity makes disinfection unnecessary. A generous 124.9 mg/kg of metasilicic acid leaves a thin film on the skin. The hotel's own guest information points to this water for fatigue recovery and cold sensitivity.

Analyzed Jul 25, 2022·（一社）群馬県薬剤師会

Explore the water

Views

Mountains

Highlights

Lukewarm Bath

About

The hotel's baths spread across three named areas. Komakusa no Yu, the main outdoor bath, has five pools (two for men, two for women, one mixed), the roofed Shakunage no Yu is women-only, and Nanakamado no Yu is indoor bathing for men and women. Every tub on the property runs straight from the spring, kakenagashi, and the water comes out milky white with sulfur. Mixed bathing is done in a bathing garment (yuamigi, 湯あみ着), and there's a private bath you can book for 45 minutes if you'd rather soak alone. One of the outdoor pools reportedly runs cooler than the rest, good for a long soak. At 1,800 meters this is the highest hot spring in Japan reachable by car year round, and the hotel calls itself the onsen closest to the stars. The outdoor baths look out over a wide sweep of mountains, with clear starry skies on a good night.

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5.0

1 review

Sergey M

8 months ago· edited

813. Manza Prince Hotel, Manza Onsen, Gunma ★★★ I used a duplicate booking. There is a private bath (I did not use it). There is day use. With the Manza tegata, it is ¥500, the regular price is ¥1,500. Day use is listed as 10:00 to 16:00 (last entry at 15:00). Staying at Manza Prince Hotel gives free day use for the mixed bathing area at Manza Kogen Hotel. In turn, staying at Manza Kogen Hotel should give free reciprocal day use at Manza Prince Hotel. 1. Outdoor mixed bathing area. They provide and require clothing. Direct view of the mountains and forest. 1.1. Right stone bath. The water is clear turquoise, with a lot of lime. Temperature is 38. 1.2. Center stone bath. The water is clear turquoise, with a lot of lime. Temperature is 43. 1.3. Left stone bath. The water is clear turquoise, with a lot of lime. Temperature is 42. 2. Indoor men's stone bath. The water is clear turquoise, with a lot of lime. Temperature is 42.5. Breathing inside is comfortable. A top mixed onsen with a mountain view and great acidic water. A wonderful onsen experience. 15.01.2026 16.01.2026

Alexey Lopato 🐻

1 year ago

A sibling of the well-known higaeri spot Manza Kogen Hotel 万座高原ホテル. Got a discount on Booking and free shuttle from Karuizawa. There's a ski resort nearby and a stamp rally with a surprise Konosuba collab. If you stay here, you can go to the onsen at Manza Kogen Hotel 万座高原ホテル for free. A bus runs every hour between the hotels, which are 150 meters apart. About the onsens: men have 2 baths — one at 37 and one hot at 40-41. There's a mixed bath. Women have 2 onsens (2 changing rooms). One bath is separate in one onsen area. The second onsen has 2 baths plus access to the mixed zone. In the mixed zone you either need to cover up with towels or buy shorts or a bathing dress. A fun detail: there's no wall between the mixed zone and the men's baths, so men always have to cover up with towels. But between the mixed zone and the women's section there is a wall. The highlight is the view from the baths of snowy mountains like in the 2nd photo. 3rd photo is from Manza Kogen Hotel 万座高原ホテル. Frog at Manza-Kazawaguchi Station 万座・鹿沢口駅. The hotel.