Onsen OniOnsen Oni

Oniishi no yu

鬼石の湯おにしのゆ

Other
Beppu OnsenKannawa Onsen
Kyushu & Okinawa·Oita
0977-27-6656oniishi.com

Day Use

Yes
10:00–21:30

10:00~Reception until 21:30 Closed: 1st of every month (if Sat, Sun, holiday then next weekday)

¥620

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

OnsenYes

Uses natural hot spring water

Capabilities

Private BathYes

Private bath available for day-use visitors or hotel guests to reserve

Policies & Services

TattooYes

Allows entry with visible tattoos

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

40 parking spaces

鬼石の湯

Oniishi no Yu Spring

Operated by · 株式会社 別府観光産業

Sampled at mixing tank
塩
Chloride
Classification

Sodium Chloride spring

A scorching 93 °C source in Beppu's Kannawa district — among Japan's hottest natural wells. Chemically a sodium chloride spring with weak acidity (pH around 3.3 to 3.4), the water reads colorless and clear at the spout but carries a faint salty-bitter tang and a hint of iron on the tongue. Roughly 584 mg/kg of metasilicic acid layers in a thin silica film that leaves skin noticeably smoother once you cool back down.

pH
3.40
Weakly acidic
Source temperature
93.0°C
Hot
Tonicity
4.67g/kg
Hypotonic
Flow rate
300L/min
Typical
Color
colorless and clear
Taste
slightly salty and slightly bitter, with a faint iron note
Odor
odorless
Highlights
  • Top-decile hot
  • High silica

Analyzed Aug 25, 2021·大分県薬剤師会検査センター·Cert no. 7R-21080003

Programs

About

A healing bath located by the Hell Tour. This day-use bathing facility is situated in Kannawa, Beppu City, which has one of the highest hot spring outputs in Japan's top onsen prefecture. The Kannawa area is also famous for the Beppu Hell Tour, where you can fully enjoy the hellish hot springs.

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SM
Sergey M
2 years ago

83. Oniishi no Yu, Beppu Onsen near the hells. Entrance is at the same place as the hells — turn left and walk a bit. From the rest area you can see one of the hells. Stamp available — they even have a framed black towel. There are three baths. Indoor bath is clear, water is mild — between warm and hot. Breathing is fine. Two outdoor baths — clear water, temperature is hot-. The first is a rectangular bath on the first floor, the second is on a balcony on the second floor, but there's no real view — maybe a touch of steampunk. If you're near the hells or need a stamp, worth stopping by. No particular reason to visit specifically.