Onsen OniOnsen Oni

Kibō-sō

湯の山温泉 希望荘ゆのやまおんせん きぼうそう

Lodging
Yunoyama Onsen
Kansai·Mie
059-392-3181kibousoh.or.jp

Day Use

Yes

Bathing & Water

OnsenYes

Uses natural hot spring water

Water treatment

from Article 18 disclosure
  • Added water
    Yes
  • Reheated
    Yes
  • Recirculated
    Yes
  • Disinfected
    Yes
    銀イオン・塩素
  • Bath additives
    Not disclosed

希望荘源泉

Kibōsō Spring
ラ
Radon
+ Bicarbonate
Classification

Sodium Bicarbonate spring

A sodium-led bicarbonate spring — the classic jūsō-sen style — that also carries a weakly radioactive character. Weakly alkaline and soft on the skin, it sits in the Japanese beauty-water family. Dissolved solids of 1,940 mg/kg give it moderate, noticeable body. The bath is diluted to make up for limited source flow, reheated to a comfortable bathing temperature, and for hygiene it is served via recirculation and disinfected with silver ions and chlorine.

Source temperature
26.4°C
Low temp.
Tonicity
1.94g/kg
Hypotonic
Free CO₂
7.30mg/kg
Low

Analyzed Sep 3, 2013·三重県保健環境研究所·Cert no. 三重県知事登録第1号

Loading map…

SM
Sergey M
1 year ago

438. Kibo-so, Yunoyama Onsen Visited for higaeri (listed as 11:00 to 21:00, 600 yen). There are two entrances, and one of the reception desks is on the mountain. From that reception you ride a funicular to the onsen building, and the view from it is incredible — Nagoya spreading out in an LA-like panorama. At the time of our visit it was part of the Yunoyama stamp rally January-March 2025. Bath photos from the internet are partially accurate — adjusted for daytime lighting. Sample photo of the city view is from the funicular — the view from the bath looks very similar (except for a thin twig fence in the onsen). Sign photo is from the internet. Outdoor stone bath with an amazing city view. There's a fence of horizontal twigs for safety. They're thin and the view doesn't suffer much. Water is clear, temperature 40. Indoor bath with clear water, temperature 41. The air is comfortable. There's a steam sauna. An excellent higaeri evening option when visiting Yunoyama Onsen. Magnificent and unique onsen view for the area.