The idea quickly took off with the Japanese public despite Furukawa's lack of credentials, and the militarist government of the time commissioned a study aimed at breeding ideal soldiers. And it is not really a lack of information, it is just impossible to know these unobservable, other possibilities. There is no scientific evidence to back up the blood type personality theory, but blood type matters to many Japanese people My blood type is AB, which is the least common in Japan and we are the most discriminated against in Japan. November 4, at 2: The same as horoscopes. Unfortunately, their indecisive nature makes it very difficult for ABs to commit in a relationship. This stuff is just superstition that has been scientifically disproven again and again.
And if they guess wrong?
Blood type personality theory
Do you really not know? Should I be worried? In Japan, penetration rate of blood-typical personality traits were investigated. No blood-type harassment trials have been reported, so far. It was expected that differences in self-reported personalities a self-fulfilling prophecy would be detected from the subject who believed blood-typical stereotypes.