Thanks for the replies so far - still keen on Hakuba, although regarding your comment about Hakuba not being quiet : do you mean the villages (bars) or that the ski hills/lift lines can get busy?
Any suggestions for other resorts - good off piste (without risk of losing lift pass), not too small a ski area with accom near lifts and most importantly not too busy on the hill. Niseko also sounds good (lots of snow/large interlinked ski area), although I understand it can get rather busy and tracked out prety quickly on powder days?
Thanks