Yamashinobu

静寂な森の宿 山しのぶせいじゃくなもりのやど やましのぶ

Lodging
Kyushu & Okinawa·Kumamoto

Day Use

Yes
11:00–14:00

The outdoor bath is not always available

¥500

Bathing & Water

Outdoor BathYes

Open-air outdoor bath

Indoor BathYes

Enclosed indoor bathing area

OnsenYes

Uses natural hot spring water

Capabilities

Private BathYes

Private bath available for day-use visitors or hotel guests to reserve

Room OnsenYes

Private onsen bath in guest rooms, for overnight guests only

小田温泉(山しのぶ)

Oda Onsen (Yama Shinobu)

Operated by · 山しのぶ

Bicarbonate
+ Chloride · Sulfate
Color
faintly yellow, slightly turbid
Taste
tasteless
Odor
odorless

Sodium Bicarbonate-Chloride-Sulfate spring

pH 6.3NeutralHot source · 68°CHigh silica
Composition fingerprint1.5 g/kg dissolved · Hypotonic
Na⁺59
Mg²⁺17
Ca²⁺14
HCO₃⁻40
Cl⁻34
SO₄²⁻26
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Bicarbonate HCO₃⁻
"soda" — softens skin, leaves it smooth.
Known good for
  • Smooth skindry, rough skin
  • Circulationtired legs
  • Aches & jointsstiff shoulders

A sodium-led spring blending bicarbonate, chloride and sulfate anions, emerging at a hot 68 °C and faintly yellow with slight turbidity at the source. Neutral pH and moderate mineralization (about 1.52 g/kg) give it noticeable body without heaviness. A generous 313.6 mg/kg of metasilicic acid leaves the kind of fine silica film that makes skin feel noticeably smoother after the soak.

Sampled at wellhead·Analyzed Oct 18, 2016·株式会社 同仁グローカル·Cert no. K16104204

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4.0

1 review

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Sergey M
6 months ago· edited

422. Yamashinobu, Oda Onsen, Kumamoto ★★ I visited the day-use bath for 500 yen, located about a 30-minute walk from the center of Kurokawa. The day-use hours are from 11:00 to 14:00. The outdoor bath for day-use is not always available, so it's better to check before going. They stamp the 88 Onsen of Kyushu passport. It is not included in the Kurokawa tegata (hand stamp pass), although it is actively advertised at the ryokan itself. In January, there was a matryoshka doll at the reception. When I asked about it, they said it was a gift. 1. Outdoor stone bath. View of trees, very natural atmosphere, although partly enclosed by a fence. The water is clear, temperature around 43-45°C (the closer to the source, the hotter). I managed to catch the yukemoribi (hot spring fire). 2. Indoor bath, water clear, temperature about 43°C. Good air quality inside. Recommended to visit with the outdoor bath. Without it, the day-use visit can be skipped. 15.01.2025 29.12.2025

Onsen Oni

Last updated June 19, 2026