My partner and I stayed at Shima Onsen around three years ago and we will forever look on our experience there fondly. I can not recommend this place enough. We stayed here in early February so the weather was perfect for a couples onsen. The onsens were absolutely amazing and you definitely need to try it if you come to Japan. The views from the onsens were so calming and peaceful. The atmosphere was amazing. I don’t think I have ever felt more relaxed in my life. The staff were incredibly friendly and kind. The food was amazing. I will definitely come back here when I go to Japan in winter next. Out of all the activities we did in Japan, this was definitely one of our favourites.