MadaraonoYu

Two types of saunas and a frigid groundwater cold plunge

Nagano Nakano City

Madarao no Yu is a day-use onsen in Nakano, Nagano Prefecture. In addition to an open-air natural hot spring bath, it features a barrel sauna added in August 2024 that permits self-administered löyly, as well as the existing indoor dry sauna, so you can enjoy two types of saunas. The frigid groundwater cold plunge, which can become cold enough to freeze in winter, has attracted attention from sauna enthusiasts.

Hot Spring & Bath Information

Madarao no Yu

TypeNatural Hot Spring

Simple hot spring (weakly alkaline, hypotonic, low-temperature). The mild, skin-friendly water quality gently warms the body from within.

Sauna

Dry sauna

90°C

Sauna TypeDry Sauna

Stove Typeelectric

Capacity8people

Men'sWomen's

L-shaped, two-tier dry sauna. It offers a solid heat of about 90-92°C, and from the window you can look out at the snowy scenery and the cold plunge.

Barrel sauna

70°C

Sauna TypeDry Sauna

Stove Typeelectric

Capacity10people

Men'sWomen's

A barrel sauna newly installed in the outdoor area. It is set at a milder around 70°C, but allows self-administered löyly so you can raise the humidity at your own pace.

Cold Bath

Cold plunge bath

10°C

Water QualityNatural Water (Groundwater, Spring, etc.)

Capacity1people

Men'sWomen's

A cold plunge bath using groundwater. Temperatures vary greatly by season, but in winter it can become so frigid that ice forms, dropping to single-digit Celsius and providing an intense cool-down experience.

Business Hours

Monday
10:00〜20:00
Tuesday
10:00〜20:00
Wednesday
10:00〜21:00
Thursday
10:00〜21:00
Friday
10:00〜21:00
Saturday
10:00〜21:00
Sunday
10:00〜21:00
Holiday
10:00〜21:00

Closed Days: None

Address

8156-649 Nagae, Nakano, Nagano Prefecture 389-2104, Japan

View on Google Maps

Website

http://madaraonoyu.com/
Onsen & Spa Facilities (Super Sento, Sauna, Spa)

Gender Access

Gender Separated

❓
Tattoo Policy
Unknown (Please Check)
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