Ah. I misunderstood.
Yes, I did open it without the issues you described, so I wouldn’t know what is causing your issues. Though opening Japanese games with an appropriate Japanese locale emulator tends to be what I do, otherwise the text and code can become gibberish. Try using this program with the game. Locale Emulator - 杏组
But if that doesn’t work, then I don’t know what to tell you. I obviously cannot help you troubleshoot an issue I’ve never experienced myself, on a game I wasn’t involved in the development of. Good luck.