That looks like it's one of those games where ASCII codes fetch S-JIS equivalents from the System Card 16x16 font. Several games do that, but it's an ugly wide-spaced, fixed-width font, so... You'll also have issues as to how much you can fit in a line and the like. To me, unless you can hack the font, it's not worth pursuing, but that's me. I posted this in another thread just now, but it's applicable here:

Is it worth dedicating your time for a whole game with an English font like that is the question? I always chose No, except for SO2 where Tru (a known pce fan) said he would manage the project thereafter, if I helped him get it started. He abandoned it eventually, so it's officially dead.