InasayamaOnsenFukunoyuNagasakiBranch

Nagasaki Nagasaki City

"Inasayama Onsen Fukunoyu" is a day-use hot spring facility in Nagasaki City, Nagasaki Prefecture. Boasting one of the largest sites in western Japan, it offers open-air baths with panoramic views of Nagasaki City and a wide variety of bathtubs. Three types of sauna, a far-infrared sauna, a steam sauna, and a salt sauna, help you work up a sweat, and you can finish off with a cold-water bath. There is also a main bath with natural hot spring water, carbonated spring water, and jet baths for a full bathing tour. The bedrock bath Hifukudō offers löyly service, and the facility is also equipped with relaxation areas, a restaurant, and family baths.

Hot Spring & Bath Information

Inasayama Onsen

TypeNatural Hot Spring

A natural hot spring that bubbles up from underground. It can be enjoyed in the main bath and the open-air bath. The water has a salty feel and excellent heat-retention properties. After bathing, your body stays warm to the core and you do not get cold easily. From the open-air bath overlooking Nagasaki City, you can take in blue skies by day and night views by night while slowly easing away your fatigue. The main bath also has an electric bath to help loosen stiffness in the shoulders and lower back.

Sauna

Far-Infrared Sauna (Stadium Sauna)

90°C

Sauna TypeDry Sauna

Stove TypeInfrared Heater

Capacity15people

Men's

A dry sauna using far-infrared heating. It is a slow, deeply warming type that heats your body from the core, and the temperature is set on the high side. The stadium-style tiered structure lets you control how much you sweat by choosing your preferred spot. Sweat gradually pours out, delivering a deep sense of refreshment.

Steam Sauna

70°C

Sauna TypeSteam Sauna

Stove TypeBuilt-in Stove

Capacity8people

Men's

A high-humidity steam sauna filled with vapor. In contrast to a dry sauna, its gentle heat and humidity make breathing easier and are kinder to the skin. Sit back, warm up, and open your pores to flush out impurities. It is a pleasant sweating experience that also leaves your skin feeling moisturized.

Salt Sauna

60°C

Sauna TypeSalt Sauna

Stove TypeBuilt-in Stove

Capacity8people

Men's

A sauna where you apply natural salt to your body before entering. The salt's osmotic effect encourages sweating and gently removes old dead skin cells from the surface. You can feel both a scrubbing effect and a detox effect at the same time, and your skin feels smooth after the sauna. Recommended for those seeking skin-beautifying benefits.

Cold Bath

Cold Bath

15°C

Water QualityTap Water

Capacity8people

Men's

A cold-water bath that tightens the body after the sauna. The temperature is set low, allowing you to sharply cool down a body warmed by the sauna. It is large enough for multiple people to use at once. The water is kept clean, and the cooling is pleasantly moderate rather than overly cold.

Business Hours

Monday
09:30〜01:00
Tuesday
09:30〜01:00
Wednesday
09:30〜01:00
Thursday
09:30〜01:00
Friday
09:30〜02:00
Saturday
09:30〜02:00
Sunday
09:30〜01:00
Holiday
09:30〜01:00

Closed Days: None

Address

451-23 Iwami-machi, Nagasaki City, Nagasaki Prefecture

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

Gender Access

Gender Separated

🚫
Tattoo Policy
No Tattoos
Premium Magazine

Japan's Must-Visit Finest Onsen & Sauna Facilities

Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.

Learn more