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Meitoya So

名湯舎 創めいゆしゃ そう

Lodging
Tohoku·Yamagata

Day Use

Yes
07:00–10:00, 13:00–21:00

for guests staying at Takamiya Hotel Group hotels

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

Capabilities

Private BathYes

Private bath available for day-use visitors or hotel guests to reserve

Room OnsenNo

Private onsen bath in guest rooms, for overnight guests only

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

DiningYes

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

WashingYes

Shower, wash stations, soap and shampoo provided

Rest AreaYes

Relaxation space for after bathing

ParkingYes

On-site or nearby parking available

岡崎屋源泉

Okazakiya Spring

Operated by · 名湯舎 創

Acidic
+ 含硫黄泉 · Sulfate · Chloride
Hot source · 51°CUltra-acidicSulfur-richHigh silica
Known good for
  • Skin conditionsatopic skin, eczema
  • Circulationtired legs
  • Aches & jointsstiff shoulders
  • Sensitive-skin cautionbroken or dry skin

Okazakiya Spring is a strongly acidic water — pH 2.0, sharp enough to prickle on contact — carrying sulfur, aluminium, sulfate and chloride in the concentrated style typical of Zao. Free hydrogen sulfide at 14 mg/kg gives it the characteristic rotten-egg note, while sulfate lends quiet body and chloride a light salty edge, all at a moderate 2,406 mg/kg of dissolved solids. Metasilicic acid runs to 267.8 mg/kg, leaving the kind of thin silica film that makes skin feel noticeably smoother once the acid bite fades. The posted sample was drawn at the bath rather than the wellhead, so the figures describe the water as it is served.

Sampled at bath inlet·Analyzed Dec 14, 2016·日本環境科学株式会社

Explore the water

About

A ryokan in Zao Onsen with a rock-carved open-air bath and a wooden indoor bath, both kakenagashi (源泉掛け流し, flowing direct from the spring without recirculation). The water here is strongly acidic and leaves skin noticeably smooth. A private rental bath is also available. As part of the Takamiya (高見屋) group, guests can do a yu-meguri (湯めぐり, bath-hopping circuit) at nearby affiliated properties.

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Reserve or check availability on a booking site.

3.0

1 review

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Sergey M
7 months ago

755. Meitoya So, Zao Onsen, Yamagata ★ I used the day-use bath for guests staying at Takamiya Hotel Group hotels. Day-use hours are listed as 07:00 to 10:00 and 13:00 to 21:00. The bath photos on the internet match what is there. 1. Indoor bath. The water is acidic, cloudy, and whitish-blue. The temperature was 42.5. It was fine to breathe inside. 2. Outdoor area. There is no view, it is behind a tall fence. 2.1. Small single-person bath in stone. The water is acidic, cloudy, and whitish-blue. The temperature was 41. 2.2. Barrel bath. The water is acidic, cloudy, and whitish-blue. The temperature was 42.5. A pleasant onsen with acidic water. 09.01.2026

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Anastasia

1 year ago

Sulfur spring. The water in the rotenburo is a comfortable temperature — you can sit there for a very long time. I was here a few years ago during a snowfall and sat until a snowdrift grew on my head. The bath is small, fits two people max, but both last time and this time I had it all to myself. The views aren't as beautiful as at the hotel where we stayed, but it was really nice to come here for free just for a change of pace.

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Last updated July 30, 2026