Japanese N64 and copy of sm64
So I've been getting into speedrunning mario 64, and have really enjoyed it. Currently, I play on an American Wii and use VC to play, but wanted to get a Japanese N64 and run on that with a Japanese version of mario 64. Is there a certain website I should go to buy a Japanese N64, or will amazon or ebay  work just as well? Also, if it says Japanese Import, does that mean it's literally just a Japanese Import or  has it been modded in some sort of way? Sorry if these are stupid questions, I just want to make sure I'm buying exactly what I want. Thanks in advance!