Yeah, that's a minor peeve I have about the USA release.
The JApanese version has an option in the menu to toggle the use of a 3-button pad (if you have one).
They apparently went out of their way to remove this option from the USA region version. Probably because 3-button pads weren't "officially" released in the USA, but I think it was a stupid move, considering there was/is nothing stopping anyone from using a Japanese 3-button pad on a US system.
So playing the US version, the "RUN" button becomes a rotation control. If you are using a basic two-button TurboPad, this is a real f*cking akward pain.
I always play the game with my TurboStick, which has the "RUN" button located right above button I. This actually works out perfectly since "RUN" rotates up from your normal stance and button I rotates down (button II fires). You won't hear much praise for the TurboStick on these forums, but I love it, and this game is a perfect example of a good use for it.