I just returned from Japan and have found a lot of interesting information like Japanese archipelago has been traced to prehistoric times
Japanese archipelago? is that in the northern region?
No it means the islands that makes up Japan. Have you heard  of the Jōmon period?
oh ok.  no, never heard of Jomon period
It was during the first millennium BC. It's when Japan started using new to that time technologies from other parts of the world.