Blood type personality · For fun
Blood type B personality and traits
In blood-type lore, Type B is the free spirit who lives at their own pace. They throw themselves into whatever catches their interest and lose track of time, yet struggle to get started on anything that does not. About one person in five in Japan and one in four in Korea is Type B, and for some reason it is also the type that has drawn the most jokes and prejudice.
- Genotypes
- BB or BO
- Passes on to a child
- B or O
- Parents who can have a child of this type
- A×B, A×AB, B×B, B×O, B×AB, O×AB, AB×AB
Type B as it is usually described
The phrase most often used for Type B is "my pace", a Japanese borrowing from English for someone who moves to their own rhythm. They are pictured turning off the road everyone else is taking to follow their own curiosity, and choosing what they find interesting over what is fashionable. Once a hobby hooks them, the gear and the knowledge pile up fast, and their eyes light up whenever it comes up in conversation.
Frankness is the other fixture of the Type B portrait. Likes and dislikes show on their face and in their words, so people say they are easy to read. Their moods can seem to change quickly, but the same trait can be read as resilience: they do not cling to what is over and move on to the next thing. They are also said to enjoy their own company, so a cancelled plan rarely bothers them much.
Strengths
Original ideas and deep focus are the strengths most often credited to Type B. Unbothered by the usual template, they find routes others miss, and when they love what they are doing they can work through the night without flagging. Their unvarnished honesty helps them relax with strangers quickly, and they are described as good at lifting an awkward room.
Blind spots
Finishing something after the excitement has faded is described as their weak spot. A new interest pushes the current task aside and the final stretch ends up with someone else. Their frankness can also land as indifference. Marking a visible finish line for dull tasks, and replaying a sharp remark from the listener’s side before saying it, heads off a lot of misunderstanding.
Type B in love and friendship
In love, Type B is pictured as someone who does not hide affection. They enjoy dates that wander through an unfamiliar neighborhood or act on a sudden idea, and making a partner laugh is counted among their charms. They also guard their own time, so a partner who wants long daily calls and every plan shared may feel a difference in pace. Agreeing early on to respect each other’s time keeps both people comfortable.
With friends, Type B mixes with all kinds of people but skips gatherings that do not appeal. Lore says they can talk for hours with someone who shares an interest, and pick up an old friendship as if they had met yesterday. When a friend is low, they are more likely to suggest going out for something good to eat than to offer words of comfort, which is its own kind of kindness.
Type B at work and in study
At work, Type B is said to be strongest where ideas are needed or where expertise can be dug deep: planning, design, research, development, any job where they get to work out the method themselves. Filling in the same form again and again, or following instructions that come without a reason, is where their motivation is said to drain away fastest.
For study, the trick is finding a hook first. In history that might be the story of a favorite figure; in a foreign language, the lyrics of a song they like. If their attention keeps jumping to another subject, alternating subjects in short blocks tends to hold their focus longer than forcing one subject for a whole afternoon.
Getting along with Type B
Genuine curiosity about what interests them is the best way in with a Type B friend. Respond with real enthusiasm when they bring up their favorite topic and they open up quickly. When working together, share the goal and the deadline clearly and leave the method to them. If something they said stung, telling them plainly on the spot, "that one hurt a bit", works far better than hinting.
The Type B stereotype, and why it is unfair
Type B has carried the "selfish" and "self-centered" stereotype more than any other type. Japanese even coined a word for teasing or sidelining people over their blood type, and Type B was often on the receiving end; in Korea, jokes about the Type B boyfriend were popular enough to inspire a 2005 film. Knowing your own mind is not the same as ignoring others, and screening partners or colleagues by blood type closes the door on getting to know them.
What research says
Blood type personality is a long-loved piece of popular culture. But large surveys in several countries, including a 2014 study analyzing the answers of more than 10,000 people in Japan and the United States, have found no meaningful link between ABO blood type and personality. If you would like to look at your current tendencies through your own answers, try the tests below. That does not mean their results connect to your blood type.
Type B: frequently asked questions
What genes make someone Type B?
Type B comes from the genotype BB or BO. A Type B parent passes on either B or O to a child, and a Type B child can be born to parents whose types are A×B, A×AB, B×B, B×O, B×AB, O×AB, AB×AB. Very rare exceptions to this rule exist, so a medical test is the way to confirm anyone’s actual type.
Are Type B people really selfish?
No evidence shows that Type B is any more selfish than other types. Blood-type lore describes Type B as following their own interests, and that description has been inflated into a joke about selfishness. How considerate someone is depends on the person and the situation, not on blood type.
Which blood types is Type B said to match?
Compatibility lore usually places Type O and Type AB next to Type B. Type O’s easygoing nature is said to make room for Type B’s freedom, while Type AB shares its taste for the unusual. Keep in mind that this is folklore to enjoy, not a prediction.
Why is Type B said to get bored easily?
Because lore has long pictured Type B moving quickly from one interest to the next. Blood-type books also recast the same trait as curiosity. What someone sticks with depends far more on how much it means to them than on their blood type.
What is "bura-hara"?
It is Japanese slang for harassment over blood type, a blend of "blood" and "harassment". It covers teasing, exclusion or unfair treatment of someone because of their type, and Type B and Type AB were frequent targets. Judging people by blood type has no scientific basis.
This page reads blood type personality lore as culture and entertainment. Each blood type is shared by a large part of the population, and blood type cannot settle anyone’s personality or relationships. Please do not tease or discriminate against anyone because of their blood type.
How to use this content
- This page is reference content for self-understanding and light interpretation, not a diagnostic or evaluative tool.
- It should not replace medical, legal, financial, or hiring decisions, and important choices need stronger evidence than a self-test.
- Use the result for reflection or entertainment only, and seek professional support first when distress or risk is involved.