Train – Note it is hard to book Trains and Buses online.
Best to do when in Japan.
You can purchase train tickets with reserve seats or non-reserve seats at a station.
You can download a PDF of the Arriving Nozawa Timetable here.
For any more train times and price please use this site http://www.hyperdia.com/
This shows the train and bus arrival times when you’re coming to Nozawa Onsen, to help you plan your journey.