http://www.silk-yamabiko.co.jp/02silk/img/02pho02.jpg
Price 500yen/person
Open 6:00-23:00, 7:00-23:00 (January&February),
17:00-23:00(every 3rd Wed)
Last admission time is always 22:00
Address: 165 Shoboji, Tantocho, Toyooka, Hyogo
(兵庫県豊岡市但東町正法寺165)
Unfortunately, no public transport connection close to this hot spring.
Their official homepage in Japanese.