Hotel Konansou

has anyone stayed at an onsen ryokan called hotel konansou at kawaguchi-ko?

any other recommendations for a ryokan around the area? the budget is between 15,000 to 20,000 yen.

We stayed there for our honeymoon. It was excellent. Service and cuisine and rooms were beautiful. There are private baths you can rent for an hour for an additional few thousand yen. It made for a very romantic morning view of Fuji-san with my new husband!

I have stayed at Konansou twice and enjoyed it. They are very friendly and the view is great. If you want to splurge you can get a room with a private bath with a view of Mt. Fuji, but otherwise the public baths and the private (rented, for a fee) baths have beautiful views. There's a foot-bath on the roof that is really neat too.
There is a Japanese website someplace (I lost it) that lists Kawaguchiko accommodations, but for English-language I recommend www.japaneseguesthouses.com or a thorough internet search.

Here is the website:
http://www.kawaguchiko.or.jp/
it has a clickable map for accommodations, so if somebody can help you with that, you can see that there are many places to stay.
oh, also, if you end up going to Konansou, don't be put off by it's exterior, which I didn't think was very attractive. It is lovely inside.

I stayed in the Hotel Konanso on my honeymoon as well, and my wife and I enjoyed it quite a lot. The dinner was very good, and the atmosphere was friendly. The location was very nice too, only a short distance from the train station (~500 yen taxi), right on the lake, and with a good view of the mountain when the clouds weren't in the way. I would not hesitate to recommend it.