This game need some ASM hacking if you want to do a good translation (expand window texts and add 24-bits pointers/rom expansion because there is not enough room for a proper translation if you only use the room of the japanese texts).
I'm actually doing a japanese-to-french translation with a friend, so if you are interested, I'll be able to share some notes/tools once the hack will be over (the tools are near finished : texts dumped, font modified, rom expanded, 24-bits pointers routine added, support for hardcoded pointers added, lots of windows texts expanded, just need to fix a few bugs and it should be okay).
One example with a fake name (BAHABULLE) for all the players :
After some ASM hacking :
Lots of names are 4-5 characters long in japanese, with 9 letters per name, you can fit 99% of them.