MainichiSaunaKoshigayaBranch

Saitama Koshigaya City

Mainichi Sauna Koshigaya Branch is a sauna facility located in Koshigaya City, Saitama Prefecture. It is the third branch of the Mainichi Sauna Group, opened in May 2025, featuring a custom-made wood-burning sauna that can accommodate up to 35 people at once. Equipped with a steam generator on the wood stove, guests can enjoy a premium sweating experience during regular aufguss sessions while watching the flickering flames. The facility offers two types of cold plunge baths: a single cold plunge bath below 10°C and a beauty bubble cold plunge bath around 15°C, allowing guests to choose according to their condition and preference. With an indoor and outdoor relaxation space made from about 100 real birch trees, visitors can feel the warmth of nature while being in the city. A communication relaxation room is also available, where guests can enjoy connecting with others through the sauna experience.

Sauna

Custom Wood-Burning Sauna

90°C

Sauna TypeDry Sauna

Stove TypeConvection Stove (Sauna Stone)

Capacity35people

🪵 Wood-fired sauna
Men's

A custom wood-burning sauna boasting the largest scale in the Mainichi Sauna Group. A spacious area that can seat up to 35 people simultaneously, equipped with a steam generator on the custom wood stove. The large stove window offers a view of the flickering flames, providing an extraordinary sense of relaxation. Regular aufguss sessions are held, where heat waves and steam draw out sweat all at once. The gentle heat unique to wood-burning saunas and the moderate humidity from the steam allow for a deep, core-warming experience.

Cold Bath

Single Cold Plunge Bath

9°C

Water QualityTap Water

Capacity5people

Men's

A crisp, cold single plunge bath chilled to below 10°C. It quickly cools down the body temperature elevated by the wood-burning sauna, enveloping the entire body in refreshing coldness. The single coldness provides a profound sense of refreshment, achieving a powerful hot-cold alternating bath. It pairs excellently with the wood-burning sauna, offering a sharp finishing experience.

Beauty Bubble Cold Plunge Bath

15°C

Water QualityTap Water

Capacity2people

Men's

A beauty bubble cold plunge bath set at a slightly mild temperature of around 15°C. With the brand's first introduction of the beauty bubble system, micro bubbles envelop the entire body, promoting blood circulation, enhancing skin beauty, and aiding in fatigue recovery. Gentler coldness than the single plunge bath allows for a more leisurely soak. It can be alternated with the single cold plunge bath according to one's condition and preference.

Business Hours

Monday
12:00〜02:00
Tuesday
12:00〜02:00
Wednesday
12:00〜02:00
Thursday
12:00〜02:00
Friday
12:00〜02:00
Saturday
09:00〜02:00
Sunday
09:00〜02:00
Holiday
09:00〜02:00

Closed Days: None

Address

3-3-1 Higashi Koshigaya, Koshigaya City, Saitama Prefecture

Onsen & Spa Facilities (Super Sento, Sauna, Spa)

Gender Access

Male Only

Tattoo Policy
No tattoo-specific restriction
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