Onsen OniOnsen Oni

Kirishima Hotel

硫黄谷温泉 霧島ホテルいおうたにおんせん きりしまホテル

Lodging
Kirishima Onsen
Kyushu & Okinawa·Kagoshima
0995-78-2121kirishima-hotel.jp

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

Capabilities

Mixed BathingYes

Shared bathing area for all genders

Mixed bathing isn't available during women-only hours.

硫黄谷12号

Iwodani No. 12

Operated by · 霧島ホテル

Sampled at wellhead
酸
Acidic
Classification

Sodium Sulfate spring

Iwodani No. 12 is a simple acidic thermal spring, sharply acidic at pH 3.0 at the wellhead so it feels faintly prickly on the skin, and classified as a hot spring at a wellhead temperature of 61.9 °C. It is unusually rich in metasilicic acid at 232.9 mg/kg, which leaves the kind of thin silica film that makes skin feel noticeably smoother afterwards. The water is colorless and transparent but carries a metallic taste and a faint metallic odor.

pH
3.00
Acidic
Source temperature
61.9°C
Hot
Tonicity
0.61g/kg
Hypotonic
Free CO₂
2.20mg/kg
Low
Free H₂S
0.10mg/kg
Low
Color
colorless and transparent, with a metallic taste and a faint metallic smell
Taste
metallic
Odor
faint metallic odor
Highlights
  • High silica
  • Ultra-acidic

Analyzed Dec 24, 2021·株式会社東洋環境分析センター·Cert no. 鹿児島県第4号

Programs

About

The signature draw here is a sprawling garden bathhouse with fourteen different pools fed by the sulfurous springs of Kirishima's Sulfur Valley (硫黄谷, ioudani). The mineral variety is real, different pools carry different water qualities, each with a distinct feel, and the grounds are large enough that it rarely feels crowded. A cedar forest wraps the whole property, and the baths have been drawing visitors for over three centuries.

Loading map…

GreyChertZ

28 days ago

A hotel with a huge onsen. There are a total of 18 baths; in the middle, the baths are divided into a common area and a separate women's area. There are also 3 baths for men: the men's rotenburo (outdoor bath), and 2 baths in the washing area with a sauna. The baths are huge, you can walk around in them, with a depth of 1.4 meters at the deepest point. Mostly these are sulfur springs, but there are also 2 baths with iron water. In the common area, you can wear a towel or go without one. The common area becomes women-only from 8:00 pm to 9:30 pm, so women can enjoy the main part without hesitation. The rotenburo is very beautiful and pleasant; it is said that the rotenburo took first place for "bath layout," and the onsen itself is ranked in the top 250 throughout Japan. It is part of Kyushu 88. There is a cedar grove around, and dinner is served in a hall with panoramic windows overlooking these cedars. I liked the food itself; there are salads with lobster, abalone, Wagyu steak, and of course local pork :) Overall, I really felt connected to this place.

SM
Sergey M
1 year ago

363. Kirishima Hotel, Kirishima, Kagoshima Visited for higaeri for 600 yen with a towel. Higaeri listed as 11:00 to 17:00, but on Wednesdays the main large mixed bath — the whole point of this place — is unavailable. They stamp the 88 Onsen of Kyushu book. Unfortunately I came on a Wednesday and could only access the small separate men's section. In the small indoor zone, breathing is comfortable. One bath with clear water, temperature around 41. Second bath with clear water, temperature around 44.5. A barrel with cloudy white water with a slight proper onsen sulfur smell, temperature around 42. There's no point in going just to the small zone. I plan to visit again on a non-Wednesday, possibly with an overnight stay.