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Furo N Den

ふろんでんふろんでん

Lodging
Kyushu & Okinawa·Oita

Day Use

Yes
12:00–19:00
¥1,500

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

Policies & Services

WashingYes

Shower, wash stations, soap and shampoo provided

TowelsYes

Towels available to rent or borrow

ParkingYes

On-site or nearby parking available

3号泉源

Spring No. 3

Operated by · 株式会社 末広倶楽部

Sulfur
+ Chloride · Bicarbonate
Color
colorless
Taste
almost tasteless
Odor
moderate hydrogen sulfide odor

Sodium Chloride-Bicarbonate spring

pH 7.2NeutralHot source · 86°CSulfur-richHigh silica
Composition fingerprint1.1 g/kg dissolved · Hypotonic
Na⁺88
Cl⁻61
HCO₃⁻27
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Chloride Cl⁻
table-salt anion — coats the skin and holds heat in.
Known good for
  • Skin conditionsatopic skin, eczema
  • Circulationtired legs
  • Aches & jointsstiff shoulders
  • Sensitive-skin cautionbroken or dry skin

A sulfur-bearing sodium chloride-bicarbonate spring carrying a moderate rotten-egg note of H₂S at the source. Neutral and hypotonic, but generously mineralized with 177 mg/kg of metasilicic acid that leaves a thin silica film for noticeably smoother skin. The wellhead runs at 85.8 °C — among Japan's hottest natural sources — and the chemistry layers chloride saltiness with bicarbonate softness.

Sampled at wellhead·Analyzed Mar 15, 2023·公益社団法人大分県薬剤師会·Cert no. 大薬検 第7R-23030009号

Explore the water

Views

Forest
Mountains

Programs

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1 review

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Sergey M
1 year ago· edited

399. Furon-den, Hita, Oita ★ I went for a day visit for ¥1000 on bathhouse day (regular price ¥1500), and they gave me two towels. The day visit is listed from 12:00 to 19:00. They stamp the Kyushu 88 Onsen stamp rally. There is a random Japanese dinosaur on the observation deck. The bath photos are from the internet, and they match. 1. Indoor area. Easy to breathe, with a slight, proper onsen smell of sulfuriness. 1.1. Large bath with clear water, temperature 41-42. 1.2. Small bath with clear water and fine white mineral deposits, temperature 40. 1.3. Sauna. 1.4. Cold bath. 2. You can go up the stairs to the outdoor bath. There is a view through the fence of the forest. When I visited, it started snowing and looked very nice, I included a photo fragment of what the forest looks like from the bath (the photo itself is already outside the bath). The bath is partly in stone, with clear water, temperature 40. There is also a "stone bath", and apparently there are onsen there too, but I did not understand it that way and skipped it. So when visiting, it is worth checking again and maybe expanding your visit. A very pleasant place, even though it is not in a convenient location. Even with the onsen I visited, it was quite nice and worth stopping by, and if there are onsen in the "stone bath" too, then even more so. 12.01.2025

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Last updated July 23, 2026