At 0x47C898; There are Japanese UTF-8 font data(UTF-8 Little endian), but it may not use.
When it compares to JAP PS3 version(UTF-8 Big endian)...
But I can't find the width, height, offset x, offset y of font data.
You can also find Chinese font data at CHS PS3 version..
But I don't have any idea how to adjust it to PC version and make a new font.
You can look on eboot files here. eboot files