Onsen OniOnsen Oni

Search Onsen Oni

Search onsen, areas, prefectures and pages.

Hanairo Hot Spring

花いろ温泉はないろおんせん

Public Bathhouse
Kyushu & Okinawa·Oita

Day Use

Yes
10:00–22:00

except the second and third Wednesdays of the month

¥400

¥2000 private bath

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

SaunaYes

Dry heat sauna room

Cold BathYes

Cold water plunge bath, typically used after sauna

Capabilities

Private BathYes

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

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

健康交流センター花いろ第十二号泉

Kenko Koryu Center Hanairo Spring No.12

Operated by · 豊後高田市

Carbonated
+ Bicarbonate
Color
colorless and clear
Taste
moderately carbonated with a faintly metallic edge
Odor
odorless

Magnesium-Sodium Bicarbonate spring

pH 6.5NeutralCO₂-richHigh silica
Composition fingerprint4.2 g/kg dissolved · Hypotonic
Mg²⁺50
Na⁺32
Ca²⁺15
HCO₃⁻85
Cl⁻15
CationsAnions
Magnesium Mg²⁺
mild; a laxative if you drink it.
Bicarbonate HCO₃⁻
"soda" — softens skin, leaves it smooth.
Known good for
  • Circulationtired legs
  • Smooth skindry, rough skin
  • Recoveryfatigue, stress

A magnesium-sodium spring that carries both dissolved CO₂ and bicarbonate. With a generous 1,130 mg/kg of free CO₂ it sits in the rare carbonated-spring class — fine bubbles cling to the skin on entry. Neutral and moderately mineralized with noticeable body, it also holds 190 mg/kg of metasilicic acid, leaving a thin silica film for noticeably smoother skin. At the source the water tastes moderately carbonated with a faint metallic edge.

Sampled at wellhead·Analyzed Jun 30, 2014·公益社団法人 大分県薬剤師会·Cert no. 大薬検 第7R-26060020号

Explore the water

Highlights

Jet Bath

Programs

Loading map…

2.0

1 review

5
0
4
0
3
0
2
1
1
0
SM
Sergey M
1 year ago

487. Hanairo Hot Spring, Oita Onsen for 400. Operating hours 10:00 to 21:30. They stamp the 88 Kyushu Onsens passport. There's a restaurant, a gym, and a private bath for 2000 (didn't try). Bath photos from the internet, matches reality. The public outdoor baths rotate between men/women — a "Roman" style and a Japanese style. 1. Outdoor zone, "Roman" style. 1.1. Round bath with "Roman" columns, clear water, temperature 42. 1.2. Round bath with clear slightly cloudy brown water, temperature 24. 1.3. Small square bath with clear slightly cloudy brown water, temperature 30. 2. Indoor zone. Breathing inside is fine. 2.1. Large bath with clear water, temperature 42. 2.2. Bubble bath with clear water. 2.3. Bath with a reclining area. 2.4. Sauna. 2.5. Cold bath. A bit of an odd place, but definitely unique in its own way. 05.04.2025

1
2
3
4
5

Last updated July 9, 2026