Did you try to uninstall/reinstall the game after switching to japanese locale + the japanese clock?
I have no issue again running the game directly from the install folder.
My current settings: " target="_blank" title="https://www.h-suki.com/forum/viewtopic.php?p=31141#p31141">">https://www.h-suki.com/forum/viewtopic.php?p=31141#p31141">https://www.h-suki.com/forum/viewtopic.php?p=31141#p31141
