I'm playing the Warlord Edition of STW and am hoping that it would be a simple matter to change the strategy map to display the provincial names in Japanese and that the map draws upon a file listing these names that I can go into and replace with their respective Japanese counterparts.

Does the strategy map indeed draw its provincial names from a text file?
If so, where can I find this file?

If this is to be accomplished another way, please tell.
Also, if you have a Japanese version of the game and the provincial names are by default in Japanese (Chinese, if you want to get technical), or if you have already accomplished what I hope to do, please share a picture of the strategy map.