Quote Originally Posted by Martialartsnovice
Could it be, that as mentioned earlier that the modern japanese. korean, and maybe the rest of Southeastern Asia ethnic groups, share a common genetic ancestral group.
That's no question. All human populations share the same root. All mongoloid populations share another root, somewhat closer to modern times. The problem is to point out the last common pre-Japanese ancestral population (& who it is shared with).

Also I know that when people speak of Europes native languages, they can be divided into a few groups: Latin Based such as Italian, French, Spainish, Portugeuse. Germanic-based: German, Dutch, English, and Polish.
Polish is slavic, actually.

The eastern European languages are more based on regional dialects or archaic tongues. Modern Greek is similar yet different from the ancient Greek dialects.
Modern languages are most often similar yet different from their ancient predecessors. I don't really understand what you mean by "based on regional dialects or archaic tongues".

Could it be, that the dialect of the Fu-Jian district in Southern China, is akin to a archaic root language once spoken in most of Asia.
Doubtful. That there is a common root is obvious, but that this root still exists is improbable, since languages evolve over time (if they don't evolve, they're dead).