Natural Hot Spring Kaiou

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 water, which gushes from 1,200 meters underground, in a free-flowing manner, 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. In the men's outdoor area, the concrete 'CUBERU Sauna' has high heat retention, stabilizing the room temperature. The '208 Poly Bucket Spring Water Bath' uses natural subsoil water from the Shogawa River, which is so pure it can be drunk, and is refreshingly cold. The facility also offers an open-air bath with Hokutolite stones and the largest nano bicarbonate spring in the prefecture, providing a diverse bathing experience.

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361 Kagamimiya, Imizu City, Toyama Prefecture
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Facility Name
Natural Hot Spring Kaiou
Facility Type
Onsen & Spa
Address
361 Kagamimiya, Imizu City, Toyama Prefecture
Website
https://onsen-kaiou.jp/
Closed Days
月
Business Hours
Friday 05:00〜01:00
Monday 定休日
Sunday 05:00〜00:00
Holiday 05:00〜00:00
Tuesday 05:00〜00:00
Saturday 05:00〜01:00
Thursday 05:00〜00:00
Wednesday 05:00〜00:00
Tattoo Policy
🚫 No Tattoos

♨️Hot Spring Information

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Hot Spring
Natural Hot Spring
Flow-through
A high-concentration sodium-chloride strong saline spring gushing from 1,200 meters underground. With an astounding concentration of 31.03g/kg in total components, it forms a salt film on the skin, offering high heat retention. The 'Freshly Drawn Barrel Bath Pure Source Spring' is provided without adding water or heating from the source temperature of 50°C, sufficiently warming the body in just 3-5 minutes of bathing. Rich in metasilicic acid, it is also expected to have beautifying effects. The water is changed daily, and the bath is cleaned, ensuring you can always enjoy fresh spring water. The warmth continues from the core of the body even after bathing, effective for improving winter coldness and recovering from fatigue.

Sauna & Cold Bath Information

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ikiサウナ
Male
90°C
High-quality iki Sauna manufactured by METOS. Natural red silica stones are used for the sauna stones, emitting a soft and deep heat through far-infrared effects. In the signature 'Copper Pot Achi Achi Neptune Löyly,' staff pour aromatic water heated in a copper pot over the stones, enveloping the room in a storm of intense heat and fragrance. The humidity and temperature rise rapidly, providing an exceptional sensation of sweat pouring from the entire body. The spacious interior with tiered seating allows you to thoroughly engage with the heat.
Sauna Type
Dry Sauna
Stove Type
Convection Stove (Sauna Stone)
Capacity
8people
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CUBERUサウナ
Male
90°C
A cube-shaped sauna made of concrete located in the men's outdoor area. Thanks to the high heat retention of concrete, the room temperature remains stable, and the heat gently penetrates to the core of the body. Being outdoors, you can feel the temperature difference with the outside air the moment you open the door, offering an unparalleled sense of liberation after the sauna. With a calm quality of heat different from the iki Sauna, it is ideal for quietly reflecting on oneself.
Sauna Type
Dry Sauna
Stove Type
Convection Stove (Sauna Stone)
Capacity
6people
❄️
[Indoor Bath] Cold Plunge Bath
Male
14°C
A cold plunge bath using the natural subsoil water from the Shogawa River in a free-flowing manner. The water temperature is refreshingly cold, instantly tightening the body after the heated sauna. The natural subsoil water is soft and pure, clean enough to be drinkable.
Water Quality
Groundwater
✓ Flow-through
✓ Drinkable
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208ポリバケツ伏流水ぶろ
Male
14°C
208 Poly Bucket Spring Water Bath. Also provided with the natural subsoil water from the Shogawa River in a free-flowing manner, cooling the body with its refreshing coldness.
Water Quality
Groundwater
✓ Flow-through
✓ Drinkable