I don't know about shipping and import fees in your case but what I do know is that if I were to import a refractor from the US or Europe to Japan shipping cost alone would be at least $200.
I don't know about shipping and import fees in your case but what I do know is that if I were to import a refractor from the US or Europe to Japan shipping cost alone would be at least $200.  Probably best to buy local if your budget is $400.