Miyazaki · Aoidake Onsen, Miyakonojō
Spa & Leisure Park Aoidake (Aoidake Onsen)
SPA & LEISURE PARK 青井岳（青井岳温泉）
A day spa (formerly Aoidake-sō) rebuilt as the centrepiece of Aoidake Nature Park in the Sakai River valley between Miyazaki and Miyakonojō. The alkaline simple spring, once picked among Japan's 'top ten viscous waters', has a silky feel; besides the main bath there are a walking bath, an electric bath, an open-air bath facing the green gorge and a sauna. The optional thermal lounge 'Yurukotto' adds bedrock-bath rooms and recliners for a long stay. Adults ¥700 on weekdays, ¥900 on weekends and holidays (¥1,000 on special days; discounts 07:00–10:00 and after 19:00); baths open 07:00–21:30, every day apart from inspection closures. An RV park, campsite and river-play spots sit alongside, ideal for a family outdoor day. 15 minutes on foot from JR Aoidake Station (pick-up available); about 15 minutes by car from Tano IC.
- Price (adult)
- ¥700
- Hours
- 7:00–21:30 (last entry 21:00)
- Closed
- Open daily (closes for maintenance)
- Access
- About 15 min on foot from JR Aoidake Station (pick-up 9:00–18:00); about 15 min by car from Tano IC; about 40 min from central Miyazaki
- Water type
- Alkaline simple
- Tattoos
- Ask ahead
- Admission
- Weekdays: adults ¥700, children ¥350; weekends and holidays ¥900 / ¥450; special days (November weekends, New Year, Golden Week, Obon) ¥1,000 / ¥500. Morning (7–10) and evening (from 19:00) discount ¥600 on weekdays. With the optional 'Thermal Lounge Yurukotto' (bedrock bath, ondol, manga, drinks, massage chairs) ¥980 on weekdays. QR payment and credit cards accepted. Free massage chairs
- Baths
- Indoor baths (hot pool, floating bath, walking bath and more), two open-air baths, a sauna and a cold plunge of natural spring water. In the separate 'Yurukotto' wing, bedrock baths, ondol floor and a manga lounge. Restaurant 'Heike-no-sato' (11:00–15:00, 17:00–20:30) and canteen 'Momiji'. Shop, beauty salon; lodging wing and RV park on site. Shampoo, conditioner, body soap and dryers provided
- Water
- Sodium bicarbonate-chloride spring (hypertonic, mildly alkaline), 37.3°C and about pH 9.6 at source. 100% source water, free-flowing (heated). Deep brown with a faint sweetness and a slick, syrupy texture that earned it a place among Japan's '100 viscous waters'. First in Kyushu to receive POLA's 'beauty-skin onsen' certificate. Indicated for muscle pain, frozen shoulder and neuralgia
- Parking & access
- Free parking for about 400 cars. 5–15 min walk from JR Aoidake Station (Nippo Line). About 15 min from Yamanokuchi Smart IC on the Miyazaki Expressway, 20 min from Miyakonojo IC. About 40 min by car from central Miyazaki, 30 min from Miyakonojo
- Phone
- 0986-57-2177
- Open in Google Maps
- Google Maps ↗
Essentials
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Why go
- 'Top-10 viscous water' alkaline spring
- Gorge-view open-air bath, bedrock lounge
- From 7 am; ¥700 weekdays; campsite next door
The old 'Aoidake-so' in the hills, reborn as a spa resort
Spa & Leisure Park Aoidake is a large day-spa and lodging complex at Aoidake Onsen, in the hills along Route 269 between Miyazaki and Miyakonojo. Long known as the public-style inn 'Aoidake-so', it has been renovated — old-fashioned outside, but inside a modern spa resort with QR payment, bedrock baths and a manga lounge. The water is a deep-brown, syrupy bicarbonate-chloride spring, 100% free-flowing from the source; it was the first in Kyushu to earn POLA's 'beauty-skin onsen' certificate and is listed among Japan's '100 viscous waters'. At ¥700 on weekdays (¥600 with the morning or evening discount) it is busy with Miyazaki and Miyakonojo locals even midweek.
pH 9.6 syrupy brown 'beauty water'
The source is a 37.3°C, about pH 9.6 sodium bicarbonate-chloride spring, heated and used 100% free-flowing. Deep brown, faintly sweet on the tongue, and — its defining trait — clinging to the skin like lotion; the outdoor tubs run even darker than the indoor ones. The bath hall offers a variety of indoor pools (hot, floating, walking), two open-air baths, a sauna and a cold plunge of natural spring water — plenty for half a day. In the extra-charge 'Thermal Lounge Yurukotto', bedrock baths, ondol floor, manga, drinks and massage chairs are all free, and lounging there after a soak is the favourite way to use the place.
Practical details and tips
The baths are open 7:00–21:30 (last entry 21:00), every day except occasional maintenance closures. Prices vary by season — ¥700 weekdays, ¥900 weekends and holidays, ¥1,000 on special days (November weekends, New Year, Golden Week, Obon) — with a ¥600 weekday rate for the 7–10 morning and post-19:00 evening discounts; ¥980 with 'Yurukotto' on weekdays. Shampoo, conditioner, body soap and dryers are provided, and QR payment and cards are accepted. It is one of the few onsen walkable from a station (JR Aoidake), but trains are sparse, so a car is easier; parking holds 400. The restaurant 'Heike-no-sato' can be used for meals alone, but the shop and other indoor facilities are for bathers only.
Before you go
- No official tattoo policy is published — ask at reception.
- Payment is usually by ticket machine in cash — bring coins.
- Last entry is 30–60 minutes before closing.
Features
Mood & scenery
Sauna & wellness
Price
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.
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