Yeah if you send me details of the ryokan I can run a check on IKYU to see what choices are out there.
But yes as a solo traveler I am familiar with this, unfortunately some ryokans don't take single guest or only offer the most basic plans... or sometimes it's the days of the week, like they don't want single guests on weekends or public holidays etc. Having said that I don't know what "run of hotel" means so really need to see it in Japanese 
I've never seen one that doesn't specify smoking or non smoking, that's strange.
