The most important thing up ahead: we loved it! The house was quite spacious for the two of us. It's an original Japanese house with all the (to us Europeans) cool Japanese interior.
Hotaka was a perfect host. She gave us really good recommendations and helped us a lot when we had a problem. Also, we spend a nice evening together talking on the patio.
One thing to be aware of: it's quite a bit outside of Tokyo. You need at least (!) 1 hour of train rides to get to the "city". So plan ahead and avoid the rush hour at all costs, especially if you have any bigger luggage. Else you do get pressed into a train car like a sardine in a tin (happened to us).
The only other to mind: the final cleaning is done with Hotaka together on the last day of the stay - please don't forget to plan time for it (as we did :-( ).
But again: Hotaka is very nice, the house is homey, so if you don't mind the long train rides, this is the spot for you.