In Japan, there's a blood type personality theory known as ketsueki-gata that claims an individual's blood group system is predictive of a person's personality, temperament, and compatibility with others. The belief in this premise is so engrained in Japanese culture that someone might reject a potential partner purely based on fears of incompatibility due to blood type. But can what flows through our veins really determine character?
Curious? Click through and discover the appeal of blood type personality.