The Japanese believe that blood types can predict personality traits
Japanese people take their blood types very seriously. According to 2015 research published in the International Journal of Science, Spirituality, Business and Technology, “people [in Japan] strongly believe that the blood type influences one’s personality, weaknesses, and strengths.”
Per these beliefs, people with type A blood are calm and collected, artistic, and polite; people with type B blood are practical, goal-oriented, and strong-willed; people with type O blood are outgoing, energetic, and outspoken; and people with type AB blood tend to have characteristics on both sides of the spectrum.
