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Ichinoide Kaikan

いちのいで会館いちのいでかいかん

Public Bathhouse
Kyushu & Okinawa·Oita

Day Use

Yes
Mon11:00–17:00
Tue11:00–17:00
Wed11:00–17:00
Thu11:00–17:00
Fri11:00–17:00
Sat10:00–17:00
Sun10:00–17:00
Public holidays10:00–17:00
¥700

Bathing & Water

Natural onsen water

Uses natural hot spring water

Outdoor BathYes

Open-air outdoor bath

Indoor BathNo

Enclosed indoor bathing area

SaunaNo

Sauna room of any kind

Cold BathNo

Cold water plunge bath, typically used after sauna

Bathing Arrangements

Private BathNo

A private bath you can reserve for yourself or your group

Mixed BathingNo

Shared bathing area for all genders

Policies & Services

WashingNo

Shower, wash stations, soap and shampoo provided

ParkingYes

On-site or nearby parking available

10 spaces

いちのいで会館(上)

Ichinoide Kaikan (Upper) Spring

Operated by · 有限会社 いちのいで

塩
Chloride
Color
colorless and clear
Taste
weakly salty
Odor
almost odorless

Sodium Chloride spring

pH 8.6AlkalineHot source · 102°CHigh silica
Composition fingerprint2.8 g/kg dissolved · Hypotonic
Na⁺84
Cl⁻86
◀ 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
  • Warmingcold sensitivity
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin

A sodium chloride spring from the Ichinoide district of Beppu: salty, heat-retaining water. Alkaline with the slippery feel of Japan's beauty-water family, it is moderately mineralized with noticeable body and leaves a faint salty tang on the lips. Among Japan's hottest natural sources, it carries metasilicic acid at 254 mg/kg, leaving a thin silica film for noticeably smoother skin.

Sampled at wellhead·Analyzed Feb 9, 2021·公益社団法人大分県薬剤師会 検査センター·Cert no. 大薬検第7R-21020003号

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5.0

1 review

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Sergey M
7 months ago· edited

889. Ichinoide Kaikan, Beppu ★★★ An onsen for ¥700. It’s located out on the edge of town. The opening hours are listed as 11:00 to 17:00 (Mon-Fri) and 10:00 to 17:00 (Sat-Sun). They stamp the Beppu Onsen-do stamp. No shower. The place itself is old, weathered, and has been out of operation for some time, so visually it feels like it could close. The facilities have also been reduced over time, there used to be a private bath, and among the baths there was a large third bath (now it is empty and has not been used for a long time, but you can find photos with water in it). The baths are a little uphill away from the building with the ticket counter. The atmosphere is as natural as it gets. Nice view over the city, and there is a cherry tree growing at the edge. 1. The nearer stone bath. The water is clear blue, temperature 42.5-43. 2. The farther stone bath. The water is clear blue, temperature 42-43. Top spot: great water, atmosphere, view. 01.04.2026

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Last updated October 8, 2026