I don't know if I've come across a glitch or I'm doing something wrong;
In the very first stage, after getting sponsorship and looking for the dude's business partner for yen, Talking about yen to the guy in the green tie returns "QQQQ" and stops the game. The other guys just say "What?" to everything, so I'm assuming this is the guy I need.
I'm playing on FCEUX 2.2.2, didn't check any of the hashes before patching it, but the file name was "Paris-Dakar Rally Special (Japan).nes"