Hot springs that remain intact Hidden hot spring list(Niigata) [Hot springs deep inside Japan]

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List of Hot springs in Japan that remain intact or a little bit artificial or artificial with some recomendations.
sangakuonsen.com (*Writen in Japanese.)

sangakuonsen.com (*Writen in Japanese.) for the location of a Mountain on Google map.

(Caution!)
H2S gases or a Bear can be conflict at the site listed below.Please keep out those sites,even if at your own risk. (Must see if you don't know the risk of H2S or anoxia at all. written in Japanese.) anoxia/H2S-Helth department Japan
(*)number of astarisks represents impression. The list of Ryokans with hidden onsen or not known much.
Prefecture Area-name of SPA hidden spring type charge mix/seperate impression comment image(link)
Nagano Japanese North Alps
Renge		 pablic bath Free Seperate ** Unparalleled view volcanic system jigoku
Nagano Japanese North Alps
Renge		 hidden spring Mix ***** a bear is also likely to take a bath
Nagano Mt. Myoko
Tsubame hot spring		 hidden spring Free Separate partly *** It was impressed by the white R/rent.
Tsubame hot spring
Nagano Mt. Myoko
Tsubame hot spring		 remain intact Free Mix **** Ski slope side
Tsubame hot spring
Niigata Sea valley mountain mass
Kajiyama former R/rent		 bath house UpToU Mix ***** Please dig too much and, but appreciate.
Niigata Matsunoyama
Usagi		 bath house UpToU Mix ***** Spring quality and a feeling of opening
Niigata Yuzawa
Akayu		 hidden spring Free Mix ***** The hidden hot spring in Mt. Naeba
Akayu
* There might be some places that described as free in this page but some donations up to you expected.
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