Gensen Koma No Yuso

源泉 駒の湯荘げんせん こまのゆそう

Stay FacilityOperational

Day Use

Bathing & Water

Onsen

Uses natural hot spring water

駒の湯第3号泉

Koma-no-Yu Spring No. 3

Operated by · 源泉駒の湯荘

Sampled at wellhead
Simple

A lightly mineralized alkaline simple thermal spring (dissolved solids only 183 mg/kg). At pH 9.2 it sits firmly in Japan's beauty-water family, with the slippery soft feel that high alkalinity gives. The wellhead reading is 38 degrees Celsius and the cert classifies it as hypotonic, alkaline and warm-class — a gentle, low-stimulation soak.

pH
9.20
Alkaline
Source temperature
38.0°C
Warm
Tonicity
0.18g/kg
Hypotonic
Flow rate
203.1L/min
Typical
Color
nearly colorless and transparent
Taste
tasteless
Odor
odorless
Highlights
  • Top-decile alkaline

Analyzed Aug 2, 2019·一般財団法人静岡県生活科学検査センター·Cert no. M19009号

SM
Sergey M
1 year ago

255. 源泉 駒の湯荘, Izunokuni Public onsen for 850 (90-minute limit). Listed hours in brochures and Google (at the time of visit) were 10:00–20:00 (except Mon), but it actually closed an hour earlier according to the schedule posted inside — barely made it. They stamp the 60 Onsen of Shizuoka 24/25 booklet. The outdoor bath was already closed during my visit, but it looked interesting in photos. Online photos of the indoor bath roughly match (the actual condition is somewhere between the two photos). Inside there are 5 small semicircular baths for 2–3 people. Clear water with the following listed temperatures: 1. 35.5–37.5 2. 37.5–39.5 3. 35.5–37.5 4. 39.5–41 5. 35.5–37.5 With the outdoor bath it might have been much more interesting (Google photos look nice), but the remote location and schedule quirks (Google now shows it closes at 19:00) plus the outdoor bath availability make visiting this onsen quite questionable without calling/checking first.