Onsen OniOnsen Oni

Search Onsen Oni

Search onsen, areas, prefectures and pages.

Yumerindo

夢龍胆ゆめりゅうきも

Lodging
Kyushu & Okinawa·Kumamoto

Day Use

Yes
08:30–19:00

There are weekends and shortened days

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

Capabilities

Private BathYes

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

Mixed BathingYes

Shared bathing area for all genders

夢龍胆

Yumerindo Spring

Operated by · 夢龍胆

Simple
Color
colorless and clear
Taste
tasteless
Odor
faint hydrogen sulfide

Sodium Sulfate-Chloride spring

Hot source · 79°CHigh silica
Composition fingerprint0.6 g/kg dissolved · Hypotonic
Na⁺58
Ca²⁺15
K⁺14
SO₄²⁻69
Cl⁻30
CationsAnions
Sodium Na⁺
salt's cation — pairs with chloride to make the water salty.
Sulfate SO₄²⁻
"gypsum / Glauber's salt" — vessels and wound healing.
Known good for
  • Aches & jointsstiff shoulders
  • Smooth skindry, rough skin
  • Recoveryfatigue, stress

A hot (78.9 °C) simple thermal spring in southern Aso, among Japan's hotter natural sources. Weakly acidic at pH 3.5 with a faint rotten-egg note of H₂S — gentle on the body despite the heat. Generous metasilicic acid at 183.5 mg/kg leaves the kind of thin silica film that makes skin feel noticeably smoother afterwards.

Analyzed Sep 6, 2022·株式会社テクノス

Explore the water

Programs

Loading map…

4.0

3 reviews

from 1 reviewer

5
0
4
3
3
0
2
0
1
0
SM
Sergey M
7 months ago· edited

Food (dinner and breakfast) at Yumerindo through staying at Yumerindo Hanadomari, Kurokawa Onsen 29.12.2025 30.12.2025

1
2
3
4
5
6
7
8
9
10
SM
Sergey M
1 year ago· edited

Breakfast at Yumerindo 14.01.2025

1
2
3
4
SM
Sergey M
1 year ago· edited

416. Yumerindo, Kurokawa Onsen ★★ Stayed overnight, took breakfast (served in a separate area, liked it). A ryokan with a mixed outdoor bath in Kurokawa, located east of the central area. Learned about the achievement for the black towel in Kurokawa here, respect to the hotel for that (it hangs on the wall at reception) - I definitely would have missed it otherwise. For guests staying at the ryokan, there are four private baths (one can be reserved at check-in), located in a separate building which you have to walk to outside from the ryokan. The room had a small balcony with a great view of an inner Japanese garden covered with moss. Regarding service, there are nuances - the elderly lady at reception and the young staff at breakfast did everything precisely, but the male staff, although trying hard, did things somewhat awkwardly and uncertainly. The onsen is usually available for day-use (higaeri) from 8:30 to 19:00, but on some days of the week the hours are shortened, e.g., from 17:30 to 19:00. It is included in the Kurokawa tag. The ryokan has its own branded towels. The main mixed outdoor bath is made of stone. The water is clear, temperature around 43-44°C. The view around is of trees. A very excellent standard rotenburo, good both day and night. The indoor bath has clear water, temperature about 42°C. The air is good to breathe. There is a sauna. The private simple bath has clear water, temperature 41-42°C. A red bug or cockroach suddenly ran out here, and in panic jumped and drowned itself in the onsen. A cool rotenburo, highly recommended for visiting. For staying overnight, the service seemed somewhat questionable on one hand, but on the other hand, considering the day-use slot, it is convenient to have such a bath freely accessible. 13.01.2025 14.01.2025

1
2
3
4
5
6
7
8
9
10
Onsen Oni

Last updated June 19, 2026