Nansuikaku is a beautiful ryokan in a village location. The food was top quality, breakfast and dinner. Having a bathroom and onsen in the room was a good way to go for the shy foreign traveller, but they also have access by booking (40 min per day) to the family onsen which is good for couples wanting to experience onsen together. We travelled to the location by local bus from Fukuoka and continued on to Beppu by local bus and train - so the isolation is not a problem if you have time.