The Japanese version of the game is region-locked to Japanese systems, showing only a message saying "Developed for use only with NTSC Mega Drive Systems" on consoles from other regions.
But if you use a mod or emulator and change the region of the console, the message will change to "Oh...This machine has some how become an NTSC Mega Drive System" and the game will then proceed to play normally.
Contributed by Kisaraji
Attachment
Attachment