Ketsu Eki Gata: Updated

  Recently the past two months, we have been receiving requests on info on blood type traits. Not sure why... maybe it's becoming a popular subject?? Not sure... Anyway for everyone that has been wanting know about what is the huge deal with blood type traits in Japan, here is the post; which have finally updated some new info that has been booming in Japan recently.

There is a popular belief in Japan that a person’s ABO blood type or ketsueki-gata is predictive of his or her personality, temperament, and compatibility with others, just like as astrological signs are in the West.
A very serious matter... seriously!!
In Japan, a person’s blood type or ketsu eki gata is a popularly used to determine a person’s temperament, much the way Americans use astrological signs. The difference is that the Japanese take blood types very seriously. Japanese dating services use blood types to make matches. Employers use them to evaluate job applicants. High school students exchange blood types by way of introduction. Sports card include athletes’ blood types prominently alongside more traditional sports statistics. Manufacturers even market a wide variety of blood-type specific products, including calendars, chewing gum, colas, and condoms.
(Compiled from JapanToday's article[1])

They say the majority of Japanese are type A.  According to the Racial and Ethnic Distribution of Blood Types these are the breakdown of blood type percentages in various countries:

  • Japanese :   38% A,  22% B,  30% O and 10% AB

  • Chinese in Beijing:  27 % A, 32% B, 29% O and 13% AB

  • Korean:  32% A, 31% B, 28% O and 10% AB

  • Vietnamese:  22% A, 30% B, 42% O and 5% AB

  • All USA:  42% A, 10% B, 42% O and 4% AB

  • U. K.: 42% A, 8% B, 47% O and 3% AB

This is a fun chart to check out so please have a look.  
Just by looking at the numbers, it is interesting to see so few B’s and AB’ s in the U.S. and U.K.


Facebook in Japan and Korea are the only few Facebook sites that allow users to include their blood type in their profile. Below is the basic information on each personality chart; the one below is with more detail and information of each blood type. 
** Remember is is just for fun, do not take it seriously! **

Japanese Blood Type Personality Chart

There are four different types:  A, B, O and AB. There is also the Rh factor making each either positive or negative.  However, in this analysis, the Rh factor does not come into play, they are only concerned what type you are.  Now do you recall all those biology classes…and that blood type is inherited? While here in Japan, there were a few common knowledge characteristics, but depending on which book you read, these can vary... so please take this with a grain of salt.


Blood Type A: 

Type A persons are hard working, detail oriented and very organized.

Best traits: Earnest: creative, sensible, reserved, patient, responsible.
Worst traits
: Fastidious, over earnest, stubborn, tense.

Blood Type B:  

Type B’s are known to go “my way” and are individualistic.

Best traits: Wild, active, doer, creative, passionate, strong.
Worst traits
: Selfish, irresponsible, unforgiving, unpredictable.

Blood Type AB:  

Due to the combination of A and B, they are considered to be difficult to read, yet creative.

Best traits: Cool, controlled, rational, sociable, “split personality”.
Worst traits:
Critical, indecisive, forgetful, irresponsible.

Blood Type O: 

O’s see the big picture and are dependable leaders.

Best traits: Agreeable, sociable, optimistic.
Worst traits:
Vain, rude, jealous, arrogant. 

Here is a more detailed chart of each blood type.

Type A: The Farmer

  • Speaking broadly, it is said that people with Type A Blood are calm, composed, levelheaded, and very serious. They have a firm character, and are reliable, trustworthy, and hardheaded. They are shy, introverted perfectionists. They are considerate to others and don’t easily lie. They are loyal to friends and coworkers. They can be secretive, though, and don’t often share their feelings. They try to suppress their own emotions, and because they have continual practice in doing this, they appear strong, when, in actuality, they have a fragile, nervous side, as well. They tend to be hard on people who are not of the same type, and consequently, tend to be surrounded with people of the same temperament. They also don’t hold their liquor well. 
  • Type A’s are the most artistic of the groups. They can be shy, cautious, conscientious, reliable, trustworthy, and sensitive. They can also be overcautious, picky, arrogant, and reckless when drunk.

Type B: The Hunter

  • People with Type B Blood are curious everything. That may be good, but they also tend to have too many interests and hobbies. They tend to get excited about something suddenly only to drop it again just as quickly. They seem to manage to know which of their many interests or loved ones are truly the most important. B Types tend to excel in things rather than just be average, but they tend to be so involved in their own world that they neglect other things. They have independent spirits with strong personalities. They have the image of being bright and cheerful, full of energy and enthusiasm, but some people think that they are really quite different on the inside. They also don’t really want to have much personal contact with others. While they don’t care what others think of them. They are extremely passionate about the things they hold dear. 
  • Type B’s are the individualists of the blood group categories and find their own way in life. 
  • Type B personalities can be curious, bright, cheerful, enthusiastic, independent, sensitive, and unpredictable. They can also be superficial, unreliable, selfish, unpredictable, indiscreet, lazy, and impatient.

Type AB: The Humanist

  • Type-AB people are an unpredictable, distant lot, but tend to use their heads over their hearts. They are good with money. Type AB’s are the split personalities of the blood groups. They are considerate of other people’s feelings and deal with them with care and caution. On the other hand, though, they are strict with themselves and those close to them. They, therefore, seem to have two personalities: one for those “outside,” and another for people on the “inside.” They often become sentimental, and they tend to think too deeply about things. AB Types have a lot of friends, but they need time to be alone and think things through, as well. They can be both outgoing and shy, confident and timid. While responsible, too much responsibility will cause a problem. They are trustworthy and like to help others. 
  • Type AB personalities can be sensitive, considerate, careful, and efficient. They can also be strict, moody, easily offended, critical, and standoffish. 

Type O: The Warrior

  • Type-O people are outgoing, expressive, and passionate. They are highly motivated, natural leaders. Blessed with a strong physical presence, they aren’t afraid to gamble because they are so convinced they’ll win. Type O Blood people are said to set the mood for a group and to take on the role of creating harmony among its members. Their image is one of being peaceful and carefree. They are also thought to be big-hearted and benevolent, and they tend to spend money on others generously.They are natural athletes. They tend to be obsessive in their quest for success, and this can make them boring to others. Type O’s are outgoing, and very social. They are initiators, although they don’t always finish what they start. They appear to be levelheaded and trustworthy, but they often slip and make big blunders inadvertently. That is also the what makes O Types lovable. Creative and popular, they love to be the center of attention and appear very self confident. 
  • Type 0 personalities can be carefree, generous, independent, flexible, idealistic, goal-oriented, athletic, competitive, and adaptable. They can also be clumsy, flighty, jealous, greedy, unreliable, obsessive lover, vain loudmouths.

Aya: "My blood type's B. They did a really good job in describing me. Love being positive and looking ahead. Love doing things on my own. Super curious as well kinda of slow sometimes... also love to be everywhere! Will admit I hate waiting... have no patience, and I'm not very affectionate either, not that i don't love them. Ah makes me sound evil! (/∇\*)。o○♡ LOL!"
Chel: "Blood Type O!! Oh YEAH!!  Awesome job describing me a bit too much. Dependable leader, sociable, carefree. Though I wonder if I am an obsessive lover?... Hmm ... Oh well... Already too late for my hubby to run away from me. (ノ∀`●)⊃♡ He won't be able to even if he tried. LOL!"

♡♡(๑→ܫ←人→ܫ←๑)♡♡ Romantic Comparability by Blood Groups: ♡♡(๑→ܫ←人→ܫ←๑)♡♡
A is most compatible with A and AB
B is most compatible with B and AB
AB is most compatible with AB, B, A and O
O is most compatible with O, and AB

What's your Blood Type Trait?


  1. Hey I am Blood type A and I have to admit some of this actually hit the spot which is pretty hilarious! ^^ Awesome post!! Very entertaining!!!

  2. hello, I also noticed that I am blood type A too and I gotta say it hits the spotlight for me which is funny for me too... btw great info!

  3. Hilarious!! Thank you I was wondering where I could check out what my blood type means... I have heard it in Japanese shows, and in kdrama, but never really knew what they meant.

    1. Me again!! I am blood type A!! GO A's. Which they described me really well... scary!

  4. Glad to hear it somewhat helped sort of explain, and happy to hear it was entertaining!

  5. That makes sense....
    wow... a lot of products...
    is it true that b blood tend to be the black sheep n if males are b they are sometimes considered the bad boys?

  6. Wow! I'm an O and my boyfriends an A and this fits us perfectly. It's almost freaky lol

  7. I'm a AB positive and somehow I can so relate to this.