Replying to Looking for tips for a japan trip

Just starting to plan a japan trip, still in the extremely early stages, but I'm trying to go for at least 2 weeks, hopefully closer to 3. Looking for recommendations

Where to ski? Which island and which resort(s)?
Where to stay? How much did it cost?
What to do on bad weather days?
Where to eat? What to eat?
How to get from place to place? Rent a car, public transit, uber etc?

Any and all advice or experiences are appreciated. Thanks newschoolers