Saitama Tokorozawa City
Onsen Balcony King & Queen
A hot spring resort with natural hot springs, three kinds of sauna, and three kinds of cold baths
- Natural Hot Spring
- Sauna Available
- Hot spring water cold bath
- Cold Bath Available
About Onsen Balcony King & Queen
"Onsen Balcony King & Queen" is a day-use hot spring facility in Tokorozawa, Saitama Prefecture. Enjoy natural hot spring water from 1,300 meters underground in a variety of baths, plus three kinds of sauna—a seven-level tower sauna made with Mt. Fuji lava stone, a herbal steam sauna, and a salt sauna—and three kinds of cold baths: an extra-chilled bath in a freezing room, a 2-meter-deep diving bath, and a natural hot spring flow-through cold bath. With stone sauna, a rooftop tent sauna, and a food court as well, it is one of the largest hot spring resorts in the Kanto region.
Hot SpringONSEN
Kitanaka Onsen, Tokorozawa City
A mildly alkaline sodium-calcium chloride hot spring that gushes from 1,300 meters underground. The source is colorless and clear, but has a slight turbidity and a silky texture, giving it a soft, smooth feel that blends gently with the skin. Also known as the "beautifying finish bath," it is expected to help protect against dryness and leave the skin moisturized. It is said to be beneficial for a wide range of conditions, including neuralgia, muscle pain, fatigue recovery, and sensitivity to cold, and can be enjoyed in a variety of ways, such as in a large open-air hot spring bath or in a mixed bath combining natural hot spring water with strong carbonated water.
SaunaSAUNA
Mt. Fuji Lava löyly Sauna
A large-scale stadium sauna, one of the Kanto region’s finest, using lava stones from Mt. Fuji as sauna stones. The men’s area offers a spacious seven-level layout, where the gentle, deep heat unique to lava stone wraps around your whole body and slowly brings you to a deep sweat from within. With löyly, steam rises and a wave of heat rolls in all at once for an exhilarating experience. The combination of roomy space for large groups and the high-quality heat of lava stone creates an extraordinary sauna experience.
Herbal Steam Sauna
A sauna filled with the fragrance of natural herbs and a moisturizing mist that relaxes both body and mind. While the temperature is lower than in a high-heat sauna, the high humidity and fine mist gently envelop the skin, allowing you to sweat deeply and steadily. The herbal aroma spreads with every breath, calming the mind while helping to boost metabolism. Unlike a high-temperature dry sauna, it offers an elegant and soothing hot bath experience. Ideal for those concerned about dry skin or who want to warm up at a relaxed pace.
Salt Sauna
A relatively low-temperature sauna aimed at beautiful skin through the mineral effects of salt. The temperature is kept moderate, and by slowly working up a sweat while rubbing salt into the skin, you can remove old dead skin cells and enjoy a scrub effect. After sweating, the skin feels astonishingly smooth, living up to the name of a beauty-skin sauna. In a calm space where small groups can relax, it supports both beauty and health. With regular visits, you can feel your skin gradually improve.
Cold BathCOLD BATH
Play Cold Plunge Bath
A rare, dynamic cold plunge bath even by Japanese standards, where you can swim, submerge, and dive in. It recreates the feeling of diving into a frozen lake in sauna-loving Finland, letting you cool down to your heart’s content in a spacious setting. Underground water with just the right level of coolness wraps around your whole body, instantly lowering your elevated temperature after sauna use. Its size allows multiple people to enter at once, and by swimming or submerging, you can cool your entire body evenly. This playful, refreshing experience overturns the usual idea of a cold plunge bath.
Frozen Cold Plunge Bath
A professional-grade cold plunge bath with single-digit water temperature, installed in an ultra-cold indoor room at -20°C. The double chill of room temperature and water creates an intense contrast, like diving from a scorching sauna room into the Arctic Ocean. Your whole body tightens instantly, delivering a sharp and deep cooldown. With the extreme cold sought by advanced sauna users and pro sauna enthusiasts, it raises the quality of totonou to the limit. In a space reserved for a small number of guests, you can cool down with complete focus. A challenging bath ideal for anyone who feels ordinary cold plunge baths are not enough.
Natural Spring Flow-Through Bath
A gentle cold bath made by luxuriously running natural hot spring water at around 23°C directly through the tub, keeping the strain on the body low. Neither too cold nor too lukewarm, it comfortably cools down the heat at just the right temperature. Its smooth texture, unique to natural hot springs, is a hallmark, and your body will not become too chilled even after soaking for a long time. Ideal for sauna beginners, for those who do not like cold water, or for anyone who wants to cool down at a relaxed pace. The spring minerals help condition the skin while creating a soothing space where you can breathe deeply in peace.
Facility Information
- Address
- 2-271 Kitanaka, Tokorozawa City, Saitama Prefecture
- Business Hours
- Monday09:00〜01:00Tuesday09:00〜01:00Wednesday09:00〜01:00Thursday09:00〜01:00Friday09:00〜02:00Saturday06:00〜02:00Sunday06:00〜01:00Holiday06:00〜01:00
Irregular Holidays
- Closed Days
- Irregular Holidays
- Gender Access
- Gender Separated
- Tattoo Policy (Communal Bath)
- No Tattoos
- Official Website
- View official site
Access
Visited by the Editor-in-Chief
The Editor-in-Chief visited in person in February 2026
The #1 Facility in Saitama — Exceptional in Every Way
Read the full review
See other onsen and saunas in this area
Saitama
Ryusenji no Yu Soka Yatsuka Branch
A healing space with premium saunas and a natural hot spring
Saitama
Ref Omiya by Vessel Hotels
Be soothed by a large public bath and sauna that feel like a forest spring in the bonsai city of Omiya
Saitama
Natural Hot Spring Kachofugetsu
A day-use bathing facility where you can enjoy a high-quality natural hot spring with a flow rate of 922 liters per minute and Saiboku's food