The roots of Japanese language

 There are several departments in Linguistics of academic field and also various theories in "The roots of Japanese language", so it is difficult to tell it in short period time here. In addition every theory has experienced deeper investigations depending on the researchers.

So, I will give you the general opinions of the very surfaces now.
There are many opinions about the origin of Japanese language introduced in the specific Websites, but the academic society does not see any unification even now.

The Gene Analysis Method that has remarkable improvement in the Archaeological Analysis method will be invited here and take effect without doubt very soon.

The current situation denying each other only in words will be unified by Scientifically proved truth and fact. The development of researching methods will involve tremendous revolution in every academic field, it a nothing but a Gospel at all.

Not a little influences would be brought in Anatomy of soft palate morphology, Kinematics of Pronunciation, Mandibular Kinesiology and also Tongue Kinesiology. Consequently, the effects by inviting the new method is unpredictable.

Though the amount of preface is too much unintentionally, I wanna conclude like this. But, I wanna put an emphasis on the preface also.

The reason why lasted Jyomon people in Japan land previously and immigrated people by escaping from the Continental Syun-Jyu War as refuges could be mixed without any problem was the similarity of the everyday language between them.

So, I believe in the theory, "The origin of Japanese Language at that time started 2,200 years ago.".