Takeji Furukawa (1927), 血液型と気質 Blood Type and Temperament – in Europe, type A was more common than type B, while in Asia type B was more prevalent. Von Dungern claimed A people are superior to B people. Because Asia had more B people than some parts of Europe, the inference was that Asia was inferior (along with European B’s) A Japanese scholar, Takeji Furukawa opposed that idea and asserted that B persons were active while A persons were passive.
Baron Emil von Dungern (26 November 1867 – 4 September 1961) was a German internist. Von Dungern was born in Würzburg and died in Ludwigshafen am Bodensee. In 1910–11, E. von Dungern and Ludwik Hirszfeld discovered the heritability of ABO blood groups.
Interest in the theory faded in the 1930s. It was revived in the 1970s with a book by Masahiko Nomi, a journalist with no medical background (he graduated from the engineering department of the University of Tokyo). Few Japanese psychologists criticized him at that time, so he continued to demonstrate statistically significant data in various fields and published several books with these results. Later after his death in 1981, Masahiko Nomi’s work was said to be largely uncontrolled and anecdotal, and the methodology of his conclusions was unclear. Because of this, he was heavily criticized by the Japanese psychological community, although his books remain popular. His son, Toshitaka Nomi, continued to promote the theory with a series of books and by running the Institute of Blood Type Humanics. He later established the Human Science ABO Center for further research and publication in 2004.
Thanks to Mike at: https://www.rhesusnegative.net