I didn’t make that map, just posted it. If there is another interpretation (and I am sure there are) please post that one for me. Thanks.
Oh, didn’t know that, my apologies. The Wikipedia article has some good info on Japheth. Note the quotes from Josephus and see who the sons of Japheth were supposed to give rise to:
http://en.wikipedia.org/wiki/Japheth
And some correlation has been made between Japheth and a very old Indo-European name for a deity: Greek Iapetos, Indian Pra-Iapati, and Roman Jupiter. It may be a false correlation, but it is interesting.
I’m not sure what the author of that map is getting at....particularly since he seems to be giving the continents a Pangaea configuration.