I initially tried to be civil and still am to some degree. But then he went insane. He began parroting the material on radical right-wing sites and posting racist youtube videos to discredit me. He was creating one lie to back up another lie. It all eventually came crashing down on him.

To make matters worse, caster seems to have a habit of intentionally mis-translating Chinese historical texts to suit his own agenda. He does this in order to trick anyone who cannot read Chinese characters. Which is vile and unacceptable in my opinion.

If he wants a proper debate, then tell him to behave as well.

Your profile states that you have never been to Japan so, without a clear understanding of Japanese culture, history, and thinking, how can you justify your viewpoints and severe lambasting of caster51 as you fail to provide links for your justifications so that others may read and debate.
I've been to Japan. Its just that when I registered my account, I didn't bother to fill in any of the optional content(hobbies, interest and what not).

You seem to be great at referring to Chinese history and translations and who is to say they are correct in their history and teachings?
Every country has their own view on history and teach it to their children in the best way they deem fit when actual fact usually shows that it is usually not the case. America is a typical example in their conquering of west and the native Americans. The truth is, history, any country's history, is far from what we or they are taught. It is all propaganda in one way or another.
Thats not being fair to history. Its true that records can be tainted and meaning lost over the centuries. However if we were to assume all historical texts as mere propaganda then the human race would have no history. And that is a tragedy.

Historians use Chinese records because they were the most accurate and well written for the time. Chinese records were also supported by the records of other Chinese kingdoms during that time period as well as second hand evidence and archaeological finds.

Also, have you read this entire thread? Since you seem to be so educated in this subject I would be interested in reading your views/debate concerning the other viewpoints posted which you seem to ignore but enjoy honing in on caster51 and slamming him.
I am not "educated" within the field of genetics. I do not know where the Japanese people came from or really care(other than a slight curiosity). I only began commenting when Caster51 claimed that Japan somehow conquered the Korean kingdoms of Shilla, Baekje and claimed that Kaya was a Japanese kingdom.