Reality is you really don't know what came from Japan if your only resources are online. As you stated many colors and configurations have come from Japan including bolt on neck LP copies. I have seen another LP-100 exactly like the one I have with the same Fuji-Gen serial number on the neck plate but in white.
Is my LP-100 made in Korea? If you are basing your answers to an online catalog and taking an educated guess then I still won't believe you so to me it's a definitely a MAYBE.
Are my American Fender Strat's and MIJ Fender Tele's worth more than my LP-100? YES, FACT