Hanairo Hot Spring

花いろ温泉はないろおんせん

Other

Kyushu & Okinawa·Oita

0978-22-1155 hanairo.planning-support.ks-rondo.net

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

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

Sampled at wellhead

炭

Carbonated

+ Bicarbonate

Classification

Magnesium-Sodium Bicarbonate spring

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.

pH

6.50

Neutral

Source temperature

30.9°C

Warm

Tonicity

4.17g/kg

Hypotonic

Free CO₂

1130mg/kg

Very high

Color: colorless and clear
Taste: moderately carbonated with a faintly metallic edge
Odor: odorless

Highlights

CO₂-rich
High silica

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

Programs

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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