Okinawa · Naha & Senaga Island
Ryukyu Onsen Ryūjin-no-Yu, Senaga Island
琉球温泉 龍神の湯（瀬長島）
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.
- Price (adult)
- ¥1,500
- Hours
- 06:00–24:00 (last entry 23:00)
- Closed
- Open daily
- Access
- 15 min drive from Naha Airport / free shuttle from Akamine monorail station
- Water type
- Simple spring
- Tattoos
- Not allowed
- Admission
- Adults (junior-high+) ¥1,500 weekdays / ¥1,700 weekends and holidays, elementary ¥800, infants free — bath and face towels included (revised Oct 2022; some listings say ¥2,000 — check the latest). 11-ticket book ¥15,000 (no weekend surcharge). Shoe locker ¥100 refundable. Cards accepted. Free for hotel guests
- Baths
- Ground floor of the hotel, halls swapping daily. Indoor stone bath (heated nano-water), sauna, and a west-facing open-air area: a 120 cm-deep “standing bath” looking straight at Naha Airport’s runway and the sea, three pot baths and a lie-down bath. The open-air tubs are free-flowing spring water. Tatami lounge; crowd levels viewable on your phone. Generous amenities (toner, lotion etc.)
- Water
- Sodium chloride strong-saline spring, pH 7.5, 50 °C at source, drilled from 1,000 m. Clear yellow-brown and salty to the tongue — the salt films the skin for lasting warmth, hence the “fertility bath” nickname. Open-air tubs free-flowing (slightly diluted); the indoor bath is nano-water, not spring
- Parking
- Large free car park behind the hotel. Free shuttle bus from Akamine station (one stop from the airport). ~15 min by car from Naha Airport
- Phone
- 098-851-7167
- Official site
- resorts.co.jp ↗
- Open in Google Maps
- Google Maps ↗
Essentials
Stay in this onsen town
Compare and book stays in Naha & Senaga Island. Day bathing itself needs no booking.
Opens partner booking site (affiliate)
Why go
- Sunsets and landing planes from the tub
- 15 min from the airport
- Open from 6 am
Landing aircraft and the sea straight ahead — the open-air “standing bath”
Senagajima is a small island linked by causeway just south of Naha Airport, famed for the sight of aircraft descending overhead beside the runway and for the white terraced shopping complex Umikaji Terrace. On its hill, “Ryujin-no-yu” on the ground floor of the Senagajima Hotel is the best view-onsen on Okinawa’s main island, using sodium chloride strong-saline water rising at 50 °C from 1,000 m down. The west-facing open-air area has a 120 cm-deep “standing bath”, so you can watch planes land on the airport’s second runway and the sun set towards the Kerama Islands while submerged to the shoulders. The water is salty enough to taste, keeps you warm long after, and the open-air tubs are free-flowing; pot baths and a lie-down bath at a gentle 41 °C invite lingering. At ¥1,500 weekdays / ¥1,700 weekends including towels, travellers can drop in empty-handed, and with hours from 06:00 to midnight it is the ideal last bath before a flight home — there is a free shuttle from Akamine station, one stop from the airport. Note that tattoos are explicitly not permitted. Mornings offer the prettiest sea colours and fewest people; after 14:00 the westerly sun is strong, and sunset is busy.
Tips & cautions
- **No tattoos** (covering stickers are not accepted as a rule — enquire first).
- The standing bath faces west: mornings give the best sea colours and fewest people, after 14:00 the sun is harsh, sunset is crowded.
- Strong saline: stings cuts, tarnishes jewellery; shower the salt off afterwards if your skin is sensitive.
- The indoor bath is not spring water (nano-water); the onsen is the open-air area.
- Aircraft noise is barely noticeable in the lounge but loud outdoors — that is the charm.
- Bring a ¥100 coin for the shoe locker. Crowd levels can be checked on the official site.
- Check the Akamine shuttle timetable; a taxi from the airport is about ¥1,500.
- Umikaji Terrace + bath + airport makes a perfect final half-day.
Getting there
Free Senagajima Hotel shuttle ~10 min from Akamine station (Yui Rail, one stop from Naha Airport) — Senaga 174-5, Tomigusuku. ~15 min (about 6 km) by taxi or car from Naha Airport; ~25 min from Kokusai-dori. Large free car park. Walking distance to Umikaji Terrace.
Before you go
- Tattoos are explicitly not allowed, even if covered.
- Last entry is 30–60 minutes before closing.
Features
Baths
Mood & scenery
Sauna & wellness
Convenience
Language support
Amenities
✔ Verified operating: 2026-09 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
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.
Hotel Orion Motobu Resort & Spa – Jurassic Onsen Churaumi-no-yu
An onsen on the fifth floor of a resort hotel facing Emerald Beach, seven minutes' walk from the Churaumi Aquarium. Chloride water is drawn from Jurassic strata some 200 million years old, and the open-air bath looks across cobalt-blue sea to Ie Island. Two bathrooms — one with a dry sauna, one with steam — alternate daily between men and women, with cold plunge and outdoor rest area. Day use ¥2,150 including towel set, 6:00–10:00 and 15:00–23:00. A rare genuine hot spring in Okinawa, best enjoyed in the late afternoon after the aquarium.
