Mr. Yoshiaki Murakami, known as a "lifelong investor", is Type AB.

Mr. Yoshiaki Murakami, a Japanese, known as a "lifelong investor", is Type AB.

Source: Stock for Everyone (in Japanese) 

He founded the Murakami Fund, and became infamous by the "riot" of Nippon Broadcasting System's buying up some ten years ago, and was evertually arrested in 2006 as a result of suspected insider trading.
Listening to his interview, although his logic may be correct, you might be impressed by his cruel and rude personality, thereby receive the impression of "bad guy".

Later, he left Japan and moved his base to Singapore.
Recently, however, Mr. Murakami's reputation has been soaring and his two books "Lifelong Investors" and "Stories of Money I Want to Tell Now" became one of the bestsellers here in Japan.

The opposite of this is Type O Softbank president, Mr. Masayoshi Son.
Recently, you might remember that he has raised the 10 trillion yen fund scheme and the cover illustration of the leading economic magazine "The Economist" in the UK.

Source: The Economist (May 5, 2018)

Mr. Murakami is not much the same as people like Mr. Masayoshi Son, who has unlimited business appetite, romance toward the future, or "aura" which is often seen on successful business muguls.
He judges rationally based on many numbers. He seems to be enjoying investing like a "hobby".

One of the features of Type AB type is that AB insists on nothing, but analyzes data objectively and rationally.
Such a trend is typically seen in his new book "Stories of Money I Want to Tell Now".

Source: Promotion on Nikkei Newspaper (September 15, 2018)

There is no shortcut to increase money or magic. Only one.
Replacing things with numbers,
Think with the formula (expected value = profitable probability).
Be familiar with numbers from small things, memorize with numbers,
Repeat exercises to think with numbers.
It is very important to become good at numbers.
I has been a friend of money for 50 years.
This is the absolute and the only way I believe.

It is likely that the raise of the "Murakami Fund" was aimed at realizing "rationality" and "justice" which are commonly seen in Type AB.

Type AB who gives priority to rational judgment and dislikes stubborn human relations, is thereby weak in emotional connection and is unlikely seems as a "nice guy".

I can not deny that those eventually strengthened Murakami's "villain" impression.

As the times change and globalization of the economy progresses more and more, rational thinking like Mr. Murakami is becoming necessary especially in Japan.

In that sense, he may have been ahead of the times -- a little.