Okinawa · Nanjo (Southern Okinawa)
Sashiki Enjin-no-Yu Natural Hot Spring (Yuinchi Hotel Nanjo)
天然温泉 さしきの猿人の湯（ユインチホテル南城）
A natural hot spring, rare in Okinawa. Water from 2,119–1,500 m down, carrying ancient fossil seawater, runs straight to the baths with no filtration, heating or dilution. The panoramic bath looks over the Pacific and the night lights of Nanjo.
- Price (adult)
- ¥2,050
- Hours
- 6:30–23:00 (last entry 22:30)
- Closed
- Open daily
- Access
- About 40 minutes by car from Naha Airport, and close to the Kyuka Center bus stop.
- Water type
- Simple spring
- Tattoos
- Not allowed
- Admission
- The standard day plan is ¥2,050 for adults plus ¥150 bathing tax, ¥1,200 for elementary students, and free for children under 6. Two children may come free with each adult; a third is charged at the elementary rate. The bring-your-own-towel plan is ¥1,850 plus ¥150 for adults and ¥1,000 for elementary students, and is limited to bookings made by 19:00. The standard plan includes a bath towel set and loungewear, and hotel guests bathe free.
- Hours and closure
- Open 6:30–23:00 (last entry 22:30), year-round with no closing days. The phone line runs 6:00–23:00 (098-947-0112). With early mornings and late nights both covered, it is easy to fit around a day in southern Okinawa.
- Spring quality
- Water from strata 2,119–1,500 m down, laid down some 5 million and some 54 million years ago, blends naturally on its way up and carries ancient fossil seawater. It runs free-flowing with no filtration, heating or dilution, and is rich in metasilicic acid, calcium, iodine, iron and nutrient salts; its salt content is about 8% that of present-day seawater.
- Facilities
- The spa has a panoramic bath, a waterfall bath and a medicinal bath that changes with the season. Men have a dry sauna at about 90 °C with daily löyly, women a dry sauna at about 90 °C and a mist sauna at about 50 °C, plus an 18 °C cold pool. Inside there is a large hall, rest rooms and the Shochikubai dining hall.
- Phone
- 098-947-0112
- Official site
- yuinchi.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
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Why go
- Free-flowing source water with no filtration, heating or dilution
- Panoramic bath over the Pacific and Nanjo's night view
- Daily löyly in the men's 90 °C dry sauna; mist sauna and an ~18 °C cold pool for women
A rare natural hot spring in Okinawa, on the Sashiki hill
Sashiki Enjin-no-Yu is the hot spring of Yuinchi Hotel Nanjo, on a hill in Nanjo in southern Okinawa. Natural hot springs are few in Okinawa, and this one runs straight from the source with no filtration, heating or dilution. From the panoramic bath you get the blue of the Pacific by day and the night lights of Nanjo with a sky full of stars after dark. Day bathing is welcome, and hotel guests use the spring free throughout their stay.
A spring of ancient fossil seawater
The name refers to strata from the time the first apes appeared. Springs from 2,119–1,500 m down, from strata laid some 5 million years ago in the Pliocene and some 54 million years ago in the Eocene, blend naturally before reaching the surface. Though it holds only about 8% of the salt of today's seawater, it is rich in metasilicic acid, calcium, iodine, iron and nutrient salts, which sets it apart from the sea. The hotel credits this composition for the skin staying moist after bathing.
Rules worth knowing before you go
Day bathing is ¥2,050 for adults plus ¥150 bathing tax and ¥1,200 for elementary students, with a bath towel set and loungewear included. The bring-your-own-towel plan is ¥1,850 plus ¥150 for adults, but only for bookings made by 19:00. Children under 6 are free, up to two per adult. As for bathing rules: tattoos are not permitted regardless of size, and tattoo stickers are not accepted either. Children of elementary age and over use the bath for their own gender, and bathing after drinking is not allowed for safety. It is about 40 minutes by car from Naha Airport, has free parking, and sits close to the Kyuka Center bus stop.
Before you go
- Tattoos are explicitly not allowed, even if covered.
- Ryokan day-use hours are limited and may be suspended in peak season — phone the same morning.
- Last entry is 30–60 minutes before closing.
Features
Sauna & wellness
Mood & scenery
Who with
Convenience
Amenities
✔ Verified operating: 2026-10 Operating status and rates cross-checked against the official site and onsen guides (full source notes in Japanese on the JA page)
Prices and hours change. Check official sources before visiting.
More in this area
Ryukyu Onsen Ryūjin-no-Yu, Senaga Island
An onsen on an island 15 minutes' drive from Naha Airport. From the open-air bath you watch the sun set over the Kerama sea and planes land right in front of you. ¥2,000 with towels, open from 6 am — ideal last soak before your flight.
Rikka Rikka Yu (Naha Central Hotel)
Just behind Kokusai-dori, the only natural hot spring in central Naha, attached to Naha Central Hotel. Chloride water from 800 m underground fills indoor and open-air baths, plus dry, salt and mist saunas. Open 6:00–23:00 every day — handy before or after a flight. ¥1,250 on weekdays (bring your own towel). Five minutes' walk from both Miebashi and Makishi monorail stations.
Sashiki Enjin-no-Yu Natural Hot Spring (Yuinchi Hotel Nanjo)
Thirty minutes by car from Naha Airport, a natural hot spring in a hilltop resort hotel in Nanjo, southern Okinawa. Golden water from strata about 5.4 million years old carries roughly 80% the salinity of seawater and is prized for warmth and skin care. The panoramic bath and rotenburo overlook Nakagusuku Bay and the Chinen Peninsula. Open 6:30–23:00 daily; ¥2,200 including a towel set and loungewear. Pair with Sefa Utaki or Cape Chinen.
