Well,I’m not saying it is impossible as I guess I don’t have all the knowledge some of these people do, but knowledge of the Bible would seem to vacate any likelihood of a civilization in Japan that long ago.
Your meaning is unclear to me. Are you saying that the Bible puts an upper limit on how long ago Japan could have been home to a civilization?
If so: What is that Biblical upper limit? Four thousand years ago? Six thousand years ago? Eight thousand years ago? Ten thousand years ago?
Regards,