NaturalHotSpringKaiou

Toyama Imizu City

"Natural Hot Spring Kaiou" is a day-use hot spring facility located in Imizu City, Toyama Prefecture. You can enjoy the rich chloride strong saline spring that gushes from 1,200 meters underground, flowing directly from the source, warming you to the core in just 3-5 minutes. The indoor "iki Sauna" features a copper pot löyly using red silica stones, creating an intense heat wave, while the outdoor men's area has a concrete "CUBERU Sauna" with high heat retention, stabilizing room temperature. The "208 Poly Bucket Spring Water Bath" uses the natural subsoil water of the Shogawa River, which is pure enough to drink and refreshingly cold. The facility also offers an open-air bath with Hokutolite stones and one of the largest nano-carbonated baths in the prefecture, providing a diverse bathing experience.

Hot Spring & Bath Information

Bath

TypeNatural Hot Spring

Flow-through

A high-concentration sodium-chloride strong saline spring gushing from 1,200 meters underground. With an astonishing concentration of 31.03g/kg, a salt film adheres to the skin, providing high heat retention. The "Freshly Drawn Barrel Bath Pure Source Spring" is offered without adding water or heating, at the source temperature of 50°C, warming the body sufficiently in just 3-5 minutes. Rich in metasilicic acid, it is expected to have beautifying effects on the skin. The water is replaced daily, and the bath is cleaned, allowing you to always enjoy fresh spring water. The warmth continues to radiate from the core of your body even after bathing, making it effective for improving cold sensitivity in winter and recovering from fatigue.

Sauna

CUBERU Sauna

90°C

Sauna TypeDry Sauna

Stove TypeConvection Stove (Sauna Stone)

Capacity6people

Men's

A cube-shaped concrete sauna located in the men's outdoor area. The high heat retention of the concrete keeps the room temperature stable, gradually transmitting heat to the core of your body. Positioned outdoors, you can feel the temperature difference with the outside air as soon as you open the door, offering an unparalleled sense of release after the sauna. With a calm heat texture different from the iki Sauna, it's ideal for quietly reflecting on yourself.

iki Sauna

90°C

Sauna TypeDry Sauna

Stove TypeConvection Stove (Sauna Stone)

Capacity8people

Men's

High-quality iki Sauna manufactured by METOS. The sauna stones use natural red silica stones, emitting soft and deep heat with far-infrared effects. The signature "Copper Pot Achi Achi Neptune Löyly" involves staff pouring aromatic water heated in a copper pot over the stones, enveloping the room in a powerful heat wave and aromatic storm. The humidity and temperature rise rapidly, providing an exceptional sensation as sweat pours from your entire body. The room is spacious with tiered seating, allowing you to fully engage with the heat.

Cold Bath

[Indoor] Cold Plunge Bath

14°C

Water QualityNatural Water (Groundwater, Spring, etc.)

Capacity4people

Flow-throughDrinkable
Men's

A cold plunge bath using the natural subsoil water of the Shogawa River, flowing directly. The water is crisp and cold, instantly tightening your body after the heated sauna. The natural subsoil water is soft and pure, clean enough to drink.

208 Poly Bucket Spring Water Bath

14°C

Water QualityNatural Water (Groundwater, Spring, etc.)

Flow-throughDrinkable
Men's

208 Poly Bucket Spring Water Bath. Also offers the natural subsoil water of the Shogawa River flowing directly, cooling your body with its crisp coldness.

Business Hours

Monday
19:30〜22:30
Tuesday
05:00〜00:00
Wednesday
05:00〜00:00
Thursday
05:00〜00:00
Friday
05:00〜01:00
Saturday
05:00〜01:00
Sunday
05:00〜23:00
Holiday
05:00〜23:00

Closed Days: None

Address

361 Kagamiya, Imizu City, Toyama Prefecture

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

Gender Access

Gender Separated

🚫
Tattoo Policy
No Tattoos
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