I only stayed one night at pension one more time but I'd love to have stayed longer!
The food was delicious and really filling - the breakfast certainly set us up for the day! Six courses for dinner including local specialities Luke yuba and salmon from lake chuzenji.
The room was very clean and comfortable and the private hot bath was amazing!
They didn't speak much English there but were really friendly and helpful.
It is quite far from the station and you need a car or to use their pick-up service.
I'll definitely go back on my next trip to nikko.