https://bugs.winehq.org/show_bug.cgi?id=55133
--- Comment #3 from Fabian Maurer dark.shadow4@web.de --- Direct download: http://suezou.dyndns.org/dl2015/minatosoft/koya/koya_trial.zip
Seems to work just fine for me, using wine-8.10. Are you using a clean WINEPREFIX? Are you using japanese locale?