Konichiwa (for the last time)
Sorry to use this forum for conversation... but, mr. taki, you should definitely take the leap. & to answer your question, having the language down is really helpful with employability, but not totally necessary.
For snow, Japan is a powder dream, and depending on your location a cheap and ideal place to ply your shred. I pay only 15,000 Yen for a season pass at my local park. Thats about 180 dollars!!! Equipment, as I said, is crazy 'spensive tho.