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We all know that Japan is filled with interesting festivals, cultures, and beliefs. But if you are new to Japan, do not feel surprised if your new Japanese friends are curious about your blood type. The Japanese believe that blood types are able to tell a person’s character and personality. If you don’t know what your blood type is, then you better find out, because chances are you’ll be asked more than once during your stay in Japan. 

Taku Kabeya

In Japan, people are so obsessed with blood types that there are entrepreneurs that sell all sort of things based on blood types. There are blood type towels, blood type drinks, blood type diets, and believe it or not, they even have blood type condoms!   

Blood types in Japan are seen as a stereotype–that is, if you’re blood type A, you act a certain way, and if you’re blood type B, then you act a different way. This might not be true all across the board, of course. People who are B types might not identify with how they are “supposed” to act, and this goes for the other types as well. But for those who aren’t used to equating your personality with your blood type, figuring it out for yourself is nothing short of an interesting experience.


Japanese people believe that people who have blood type A are usually perfectionists and good team players, while type O people are usually generous and curious. So, to know more about the traits and personalities, here is a list of traits based on the four different blood types.


Well, like other astrology studies, the descriptions in this article are not in any way proven scientifically. We advise our readers not to take the descriptions too seriously, but do have fun and share with your friends who you think will enjoy this. Which one are you? Do you agree with it?

Of course you can also see if you “match” with someone else based on their blood type and yours. Again, it’s best not to put too much faith in this, but it’s definitely fun to see all the combinations and how things might turn out.

Blood Type A, The Farmer

  • Sensitive
  • Responsible
  • Thinks about details
  • Considerate and empathetic
  • Kind
  • Shy
  • Conservative
  • Punctual
  • Mild-mannered
  • Perfectionist
  • Careful
  • A team player
  • Peacekeeper
  • Obsessed with cleanliness
  • Hard working
  • Stubborn
  • Overcautious
  • Self-cautious

Famous Type A people: Ringo Starr, Britney Spears, Soseki Natsume, Maki Nomiya, Adolf Hitler

Blood Type B, The Hunter

  • Rational
  • Practical
  • Independent
  • Optimistic
  • Passsionate
  • Focus
  • Creative
  • Sincere
  • Strong
  • Quick to adapt
  • Flexible thinker
  • Irresponsible
  • Playful
  • Self-centered, not a good team player
  • Master of rule breaking
  • Unpredictable
  • Cold and serious

Famous Type B people: Paul McCartney, Leonardo DiCaprio, Akira Kurosawa, Jack Nicholson

Blood Type AB, The Humanist

  • Cool
  • Rational
  • Sociable, friendly
  • Organised
  • Empathy
  • Popular
  • Trustworthy
  • Responsible
  • Helpful
  • Spiritual
  • Sensitive
  • Indecisive
  • Unforgiving

People with blood type AB are hard to categorize. They can have characteristics on both ends of the spectrum at the same time.

Famous Type AB people: Marilyn Monroe, John, F. Kennedy, Jackie Chan, Mao ZeDong, Ken Kitamura

Blood Type O, The Warrior

  • Outgoing
  • Confident
  • Goal-oriented
  • Ambitious
  • Energetic  
  • Loyal
  • Passionate
  • Fighter
  • Born leader
  • Insensitive
  • Arrogant
  • Jealous

Famous Type O people: John Lennon, Paul Newman, Queen Elizabeth II, Elvis Presley, Crystal Kay, Sailor Moon

In Japan, about 40% of the population is type A, 30% type O, 20% type B, and 10% AB.

How blood types became linked to personalities


It all started in 1931 in Japan. Furukawa Takeji (1891-1940) proposed that there was a link between blood type and personality after working in the administration department of a high school and observing the temperamental differences between applicants. Furukawa proposed that we humans are simple beings, only requiring two personality types.

His report stated that people of blood type A were generally mild tempered and intellectual, while people of blood type B were the opposite, essentially dividing the population into the good and the bad.


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