JR Pass

Hi there,

I don't think that the 21-day JR Pass would be a good match, however you can get very good value out of a 7-day Japan Rail Pass from the 24th - 28th. The routes Nagano (for Myoko Kogen) - Tokyo and Tokyo - Niseko will already cost significantly more than the pass, additionally you'll be able to use the pass on local trians around Tokyo and perhaps for a daytrip somewhere.

Hope this helps :)
Daniel