DOS Japanese crap

Does anyone have any idea how to get cmd.exe in Windows XP to correctly handle programs that want to output text in a Japanese character encoding?

I'm trying to use this 6502 assembler and it's giving me messages which I can't read and can't even determine the encoding of because it's munged them so badly. It's kind of annoying.

ROOOOON PAAAUUUUL

[Error: unknown template video]
nathew made this. featuring me as the voice of the internet

here's more of that just for laughs