Will American power/audio+visual cables work on a JAP N64 console? It was much, MUCH cheaper for me to order a Japanese 64 WITHOUT cables (it was literally gonna add $60 just to get a console with hookup cables as opposed to without...wth is up with that?!), so I have the system en route, but now need to pick up the cables. Can I just go down to my local retro game store and pick up US cables and be good to go? I know everything else US will work (Gameshark, Expansion Pack, etc etc), so I dont see why this wouldn't be the same kinda deal.

Audio and video cables will work fine regardless of region, but power cables might not. For example, a JP PS2 won’t work with a US power cable (it won’t fit into the console). I don’t have a JP N64 so I can’t comment on it, but I would search for a JP power cable to be safe.

On that topic however, why are you buying a JP N64? The N64 is one of the easiest consoles to bypass region locking on (all you need to do is switch the backs of the carts. Put an English back on a JP cart to use it on a US console). The screwdrivers needed to unscrew the backs are cheap, like maybe $10. I can’t think of any reason you’d need to spend the extra money to get a JP one (although since you said it’s en route this is kinda late advice :/ )

Well that's the thing, once putting the cables aside getting a Japanese 64 was the cheapest option available actually. I could either go down to the retro game store and pay an exorbitant mark-up (the store closest to me apparently thinks their stuff is special lol) or get a Japanese one off ebay and just buy the hookups seperate. Also, from what I've seen Japanese games seem to run a tad cheaper than US ones, for whatever reason.

Probably more plentiful supply of Japanese n64s and carts. I don't know if that's the case but it's possible