The inn is called Takashimaya, Ryokan. The inn has Onsen. Some of the rooms are renovated in 2010.
I can recommend their meals and better to book dinner and breakfast.
Access:
about 10mins walk from Miyazu station
If you take an express bus from Osaka or Kyoto, you can get off at Kisenba-Minato-kan(one stop after Miyazu station) and walk about 1 min.
Booking is only possible in Japanese website, such as Rakuten Travel....