Yes. Ours came with a toilet and a small bathroom.
Yes depending on which option you choose!
Yes, some rooms have a private ensure bathroom. A great place. Do take your own tea and coffee and do have the set dinner as it was excellent.
Yes, we had a bathroom and a private tub/shower.
A lovely ryokan.
Yes all rooms come with attached bathrooms. Small though as per japanese standards
Get an answer from Ryokan Asunaro staff and past guests.