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. 
is that period during the feudal times and shogans? or I am thinking about another period of time
You are thinking of the early 1600's. During the time I'm speaking of is when the outside world actually started to find out about japan. Japan was first mentioned in the Chinese book "Book of Han".