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Kusatsu Onsen Daitokan

草津温泉 大東舘くさつおんせん だいとうやかた

Lodging
Kanto·Gunma

Day Use

Yes
15:00–21:00
¥800

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Policies & Services

TattooNo

Allows entry with visible tattoos

DiningYes

Restaurant or dining open to visitors (not just hotel meal plans)

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

湯畑

Yubatake Spring
Acidic
+ 含硫黄泉 · Sulfate · Chloride
Color
colorless and clear
Taste
not recorded
Odor
hydrogen sulfide odor present

Hydrogen-Aluminum Sulfate-Chloride spring

pH 2.0AcidicHot source · 52°CUltra-acidicHigh silicaSulfur-rich
Composition fingerprint1.8 g/kg dissolved · Hypotonic
H⁺38
Al³⁺21
Ca²⁺14
SO₄²⁻54
Cl⁻35
CationsAnions
Hydrogen H⁺
makes the water acidic — sharp and bactericidal.
Sulfate SO₄²⁻
"gypsum / Glauber's salt" — vessels and wound healing.
Known good for
  • Skin conditionsatopic skin, eczema
  • Circulationtired legs
  • Aches & jointsstiff shoulders
  • Sensitive-skin cautionbroken or dry skin

The Yubatake source at Kusatsu — sharply acidic water at pH 2.0 that also qualifies as a sulfur spring, carrying the unmistakable rotten-egg note of hydrogen sulfide right at the wellhead. The certificate classifies it as a hypotonic, acidic, high-temperature spring of the aluminium–sulfate/chloride type, and at this acidity the water prickles noticeably on the skin. Mineralization is moderate at 1,780 mg/kg of dissolved solids, but metasilicic acid is unusually generous at 243 mg/kg, leaving the kind of thin silica film that makes skin feel smoother afterwards.

Sampled at wellhead·Analyzed Aug 4, 2023·一般社団法人 群馬県薬剤師会(環境衛生試験センター)·Cert no. YU-11

Explore the water

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Sergey M
6 months ago· edited

804. Daitokan, Kusatsu Onsen, Gunma I visited for a higaeri bath for ¥800. Higaeri is listed from 15:00 to 21:00. The condition of the hotel and baths is a bit worn, it has clearly seen better days. 1. Large indoor bath. In some sections, the tiles are missing from the bottom. The water is clear, with a slight blue tint. Temperature was 43. It was easy to breathe inside, and it was cool in winter. 2. Outdoor bath. No view. The water is clear, with a slight blue tint. Temperature was 42.5. 14.01.2026

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Slava
8 months ago

Right in front of Yubatake, with lots of rooms overlooking it directly. A well-worn ryokan - everything is old, shabby, simple, but clean and does its job. As expected for a centrally located hotel, the bath is mainly indoor, fed by the Yubatake source. There's a water wheel feature inside. Small rotenburo without views. Water 42 degrees. The hotel's main perk besides the Yubatake view is a pass to visit the "sister hotels" onsen: - Kusatsu Onsen Hotel Resort with a great rotenburo - Kamenoi Hotel Kusatsu Yubatake, where one ryokan has three sources at once: Bandaiko, Yubatake, and Sainokawara. Dinner kaiseki was excellent, lots of local Gunma food. The restaurant is also stylish and pleasant. By the way, all the staff I interacted with were Japanese.

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Last updated August 4, 2026