Natural hot spring

Hot Spring "Aioi-no-Yu"

THE SPA
Seijo's natural hot springs are bicarbonate springs that bubble up from 1200 meters underground. The "black water" that is a feature of Tokyo's natural hot springs is rich in minerals that have dissolved in the strata of ancient seaweed and plants. The smooth, weakly alkaline water is gentle on the skin and is known for its high heat retention and moisturizing effects. Please enjoy the deep, beautiful black water to your heart's content.
*The natural hot springs at this facility are heated from the source, and partly uses a filtration circulation device. (The open-air “Tsuboyu” is a free-flowing hot spring that does not use a circulation device.)

Tsuboyu (Natural hot spring flowing directly from the bath)

Tsuboyu in the open-air area can enjoy natural hot springs.
If you soak yourself in a pot dedicated to one person, the natural hot spring will overflow vigorously.

Onsen

Of course, the open-air bath is also a natural hot spring.
Please enjoy the leisurely flow of time.

Indoor bath

THE SPA boasts a spacious relaxing space.
Please enjoy the beautiful black hot spring.

Foot bath

It is an outdoor footbath area with a sense of openness.
Please use it as a place to talk with your family and friends.

Bath/Sauna

Bath/Sauna

Whirlpool

The jet stream wraps around the body and massages the whole body.
Water flow stimulates blood circulation.

Vibra bus

Women's bath

Air bubbles envelop the whole body and exert a high massage effect.
You can expect the blood circulation promotion of the whole body and the beautiful skin effect.

Water bath

Repeating alternating baths with the sauna will increase your metabolism.
It is useful for fatigue recovery and health promotion.

Steam mist sauna

Women's bath

Even those who are not good at high temperature sauna can use it without difficulty.
Enjoy the scent of cypress.

loess sauna

Far-infrared rays promote sweating from the back of the body and discharge waste products.In addition, it is said that the ingredients released by the ocher used for the walls have anti-aging and detoxification effects.

Salt sauna

Women's bath

Experience the combination of the sweating action of the sauna and the skin-beautifying effect of salt.
Cleanly removes excess subcutaneous fat to keep skin taut and moisturized.It is possible to bring in salt.Please use the salt that suits you.