To install the mod, simply paste and replace the file found in steam\steamapps\common\Yakuza 5 Remastered\main\data\fontpar\font_hd_en.par

Paste and replace the file: steam\steamapps\common\Yakuza 5 Remastered\main\data\fontpar\font_hd_en.par

(Looks best on a 4K display. May look overly aliased on a 1080p display. For 1080p, I recommend the original 512x1024 version)