Onsen OniOnsen Oni

Kaimonji Onsen

海門寺温泉 Kaimonji onsenかいもんてらおんせん Kaimonji onsen

Public Bathhouse
Beppu OnsenBeppu Onsen
Kyushu & Okinawa·Oita
0977-22-3625city.beppu.oita.jp

Day Use

Yes
06:30–14:00, 15:00–22:30

except on the second Monday of the month

¥250

Adults ¥250, children ¥100

Bathing & Water

Indoor BathYes

Enclosed indoor bathing area

OnsenYes

Uses natural hot spring water

Policies & Services

TattooYes

Allows entry with visible tattoos

KidsYes

Welcomes children and families

WashingYes

Shower, wash stations, soap and shampoo provided

No soap

TowelsYes

Towels available to rent or borrow

Rest AreaYes

Relaxation space for after bathing

ParkingNo

On-site or nearby parking available

海門寺温泉

Kaimonji Onsen
Sampled at wellhead
曹
Bicarbonate
+ Chloride
Classification

Sodium Bicarbonate spring

A sodium-led bicarbonate spring from Beppu's Uenoguchi district, with a salt-tinged finish from a chloride sub-type, surfacing hot at 54.7 °C. Weakly alkaline and soft on the skin, it belongs to Japan's beauty-water family. A generous 260 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother, while the water itself runs colorless, transparent, tasteless and odorless.

pH
7.70
Weakly alkaline
Source temperature
54.7°C
Hot
Tonicity
1.36g/kg
Hypotonic
Free CO₂
23mg/kg
Low
Radon
74Bq/kg
Typical
Color
colorless
Taste
tasteless
Odor
odorless
Highlights
  • High silica

Analyzed Jan 8, 2020·公益社団法人 大分県薬剤師会·Cert no. 大薬検 第7R-20010005号

Programs

About

A municipal onsen with showers located within a 5-minute walk from the station. It was formerly known as Kaimonji Park Onsen and became a municipal onsen in 1936. Located about a 5-minute walk from Beppu Station, it is loved not only by local citizens but also by tourists. The current Kaimonji Onsen, renewed and reopened in February 2010, is fully barrier-free, with a Japanese-style exterior harmonizing with the adjacent Kaimonji Park, evoking a calm and elegant atmosphere. It features two baths with different temperatures, "Atsuyu" (hot water) and "Nuruyu" (lukewarm water), making it easier for tourists unaccustomed to hot springs to bathe and allowing visitors to feel the charm of Beppu Onsen up close.

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Sergey M
5 months ago· edited

70. Kaimonji Onsen, Beppu Municipal onsen for ¥250. Hours are listed as 06:30 to 14:00 and 15:00 to 22:30. They stamp the Beppu onsen-do. There is staff, there is a shower, there is no soap. The bath photos from the internet match the place. Two adjoining indoor baths with clear water, temperatures are 43 and 44. It is easy to breathe inside. 28.04.2024 27.12.2025