I know its late but i would assume just not to download it, i still have to play it.
But if its just about the fontwidh issue its not to big of a deal and there is a steamguide for the first game how to do it (sry i'm pretty new here and are not allowed to share any links yet), you need to install a new font (even custom ones ) and make changes in some xml files nothing to crasy, maybe works with this game too, i would bet its at least someting simmilar.
Does this require Japanese system locale? I am trying to run it but cant, install than nothing happens. Both other main games in the series works, just not this one.