Blood Type Personality: What Does Your Blood Type Personality Say About You?

Updated October 08, 2020

Medically Reviewed By: Lauren Guilbeault

In America, some people look up a potential partner's star sign to see their compatibility. If you are not shy to admit, you may have at one time, or another sought advice from the stars. Well, for Japanese people, they do not rely on the astrological signs of personality information; rather it is their blood type.

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After all, we all have blood running through the veins of our bodies. But have you ever thought about how your blood type and personality are connected? 

What Is Blood Type Personality?

This concept might seem foreign to us; many truly believe that personality traits are inherently connected to the type of blood you are born with. Although is a fun idea, there's no proof to back it up, meaning blood type personality school to be viewed as more of a myth than a scientific fact. Blood types are so ingrained into Japanese culture, that it can easily become a self-fulfilling prophecy.

But those who do believe are adamant that blood type plays a significant role in determining a person's personality. You can use your blood type to understand your unique nature. In countries such as Japan, people are very fond of asking one's blood type. Blood typing can be a useful tool for employers to assess their potential employees, in marketing companies, and in companies dealing with dating services.

Do you know your blood type? Read on and find out more about your personality traits depending on your blood type. Also, possibly check out who would be your best match depending on their blood type!

Blood Types And Personality - What Can My Blood Type Personality Say About Me?

O, B, A, and AB are the four blood types in the human race and plenty of people learn their blood type is when they give a blood donation. A lot of research on blood types and personality has been carried out in Japan where the majority of the people are blood type A. The second most common blood type is the B blood type. People with blood type AB positive are universal plasma donors. Below are the four blood types and their associated personality traits. You will be surprised at how accurate some of these are!

A Blood Type Personality

People with blood type A are clever, passionate, sensitive, and cooperative. They are loyal, patient, and they love peace. Sometimes, they may be overly sensitive about different things. For instance, they care a lot about etiquette as well as social standards. They do not like to break the set rules on etiquette or the laid down societal standards or rules. On occasions where they choose to break the rules, it’s considered a self-fulfilling prophecy.

Blood types A personalities are careful decision makers, and they take their time before they can settle on any decision. Besides, they are not good at multi-tasking, as they prefer to handle one task at a time. Blood type A personality types are very organized, and they do not like haphazard actions. They prefer to keep everything neat and in the right place. They plan everything, and every task that they engage in is carried out with a lot of consistency and seriousness. Many people with OCD fall into this category and end up seeking help from a professional counselor who can help with their compulsive issues.


People in this blood type personality are very stubborn and are easily stressed. They have high levels of the stress hormone cortisol, and this makes them intense. They do not like fights, and they prefer to be in harmony with everyone, and they like to work in collaboration with others in the community. They tend to keep to themselves more so when they do not want to share their ideas or opinions. Some of the most common personality traits of blood type A are as follows. They are kind, shy, stubborn, attentive, composed, polite, tense, withdrawn, reliable, perfectionist, sensitive, responsible, tactful, timid, mild-mannered, anxious, earnest, reserved, and polite.

The best personality traits of people with blood type A are gentle, loyal, organized, consistent, loyal, and perfectionists. Their bad personality traits are, obsessive, pessimistic, overly sensitive, fastidious, stubborn, and easily stressed.

As friends, people with blood type A are very reliable and trustworthy. If you are in trouble, then you can rely on friends with this blood type. They do not like to show their emotions, and they keep their thoughts or feeling about things hidden from others, and they share only when comfortable.

Famous people with blood type A are George Bush, Adolf Hitler, Jet Li, Britney Spears, and Richard Nixon. Considering they’re all important leaders, this might be perceived as a self-fulfilling prophecy.

B Blood Type Personality

People with this blood type are famous for their creativity. They make their decisions very quickly, and they are not good at taking orders. When they focus on something, they put their all into it, and they are unlikely to let go even if the goal is unachievable. They have a very strong drive or desire to be the best at anything that they have set their minds to do. Nevertheless, they are poor at multi-tasking, and they are likely to neglect other important tasks and put all their focus on whatever they have set their mind on at the moment.

Learn More About The Four Blood Types And Their Associated Personality Traits
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Blood type B people can be thoughtful and empathetic. They are good at understanding other people's point of view and do not like challenging or confronting others. People with blood type B make good and reliable friends.

They face a lot of discrimination because of their negative personalities such as selfishness and uncooperativeness at times. The society mainly focuses on the negative side of people with blood type B, even though they also have their good side. As a result, they tend to be loners, and they isolate themselves from others. People with type B personality may be harassed and called out for their personalities, so when they display a type B trait, it’s likely to be labeled a self-fulfilling prophecy.

Some of the most common positive personality traits of people with blood type B are such as curious, relaxed, strong, adventurous, creative, passionate, active, outgoing, and cheerful. On the other hand, the negative traits are, wild, erratic, unforgiving, selfish, uncooperative, irresponsible, and unpredictable.

Bs are generally a balance of As and Os, as they are both thoughtful and ambitious. Famous people with blood type B are Vince Young, Leonardo DiCaprio, and Jack Nicholson. People with blood type B are more compatible with fellow Bs, but they can also relate well with ABs.

AB Blood Type Personality

Blood type AB is a mix of A and B personality types. People consider them complicated and double-sided. For instance, they can be outgoing just like Bs and shy like As. At times, people view them as having double personalities, and they keep their true personalities from strangers. It is hard for a stranger to instantly decide which personality people with blood type AB have until they get to know them. They are the rarest blood types in the world.

ABs are popular and charming, and they make friends easily. When in the company of an AB blood type personality, there can never be a dull moment. They are fun and exciting friends to have around. Small stuff does not bother blood type AB personalities, but they are poor in handling stress.

ABs are empathetic, and they are always careful when dealing with others. They make sure that they consider other people's point of view. People with blood type have exceptional logical and analytical skills, and they are seen as humanists.


Some of their good personality traits are; caring, charming, controlled, dependable, cool, composed, sociable, dream chaser, trustworthy, rational, creative, adaptable, and diplomatic. Their negative traits are such as complicated, self-centered, irresponsible, vulnerable, indecisive, forgetful, unforgiving, critical, and two-faced.

Famous people with this blood type are Barack Obama, Marilyn Monroe, Jackie Chan, and John F. Kennedy.

O Blood Type Personality

People with blood type O are outgoing, go-getters, and daring. They usually set high standards for themselves, and they do all they can to achieve them. Os have excellent leadership capabilities. Little things do not concern them, and this makes them appear as selfish to people in blood group A who are overly sensitive.

People with blood group O are generous and kind-hearted. Most people love this blood type. O blood type personalities adapt well to change. They are flexible and resilient and can do relatively well even in tough situations.


Some of the positive personality traits in people with blood type O are; leadership ability, self-determined, easygoing, optimistic, calm, confident, outgoing, loyal, cautious, passionate, peaceful, resilient, independent, trendsetter, reliable, carefree, and devoted. On the centrally, they are also jealous, rude, ruthless, insensitive, unpunctual, unpredictable, cold, self-centered, workaholic, and arrogant.

Individuals with blood type O are very enduring and strong, and that is why the Japanese call them Warriors. They are honest people and hate people who tell a lie or hide the truth. People with this blood type are not overly cautious about small details, as they tend to focus more on the big picture.

Famous people with blood type O are such as Queen Elizabeth II, Paul Newman, Elvis Parsley, and Ronald Regan, John Gotti, and Gerald Ford.

Here is an easy reference guide for making compatibility decisions:



Blood types and personality traits is a fun way of understanding people. Do any of these apply to you?

Can you see how someone could equate blood types with a self fulfilling prophecy?

A Japanese Perspective on Personality and Blood Types

In the western world, most people don’t give much thought to their blood types unless they donate blood or they have a medical emergency. In Japan, if you ask someone what their “type” is, they’re likely to describe it in terms of their blood type as in O, A, B, or AB. It’s their way of having blood type explained.

As compared with other parts of the world, the Japanese culture and a few other Asian countries embrace some interesting ideas about the effect of someone’s blood type on their personality. While many people strongly believe that there is truth in the connection between personality types, blood types, and how people act, there is no real scientific evidence to prove it and there is no valid or reliable study of temperament through blood type. Many believe the Japanese’s take on personality and individual difference is more of a self fulfilling prophecy.

Takeji Furukawa was a social psychologist and a professor at Tokyo Women’s Teacher’s School who researched blood types and personality using Japanese subjects. He published a paper called “The Study of Temperament Through Blood Type” in 1927. Despite his lack of credentials, the study soon became a national conversation in Asian countries and around the world.

In another of Takeji Furukawa’s studies, he studied Japanese blood type, personality, and the like using the Formosans in Taiwan and the Ainu people of Hokkaidō. The Japanese occupied Taiwan after they invaded China in 1895 and the Taiwanese resisted and revolted, killing hundreds of Japanese. He found that just over 41% of Taiwanese samples had type O blood and assumed that their strong-willed and rebellious nature was due to O type blood in their genes. He supported his findings by reporting that slightly over 23% of the Ainu people had type O blood and they were submissive. Furukawa concluded from his Japanese subjects that Japan should strive to increase intermarriage with the Taiwanese to pare down the number of Taiwanese with type O blood. While the concept of the connection between blood type and personality took root in many eastern places, the general thought is that his results turned out to be little more than a self fulfilling prophecy.

In the western world, many people put value and worth in their star signs and horoscopes. In some Asian countries, who you truly are is based on your blood. Your blood type in Japan is a topic of interest and intrigue along the same lines as astrology. Some people believe that Japanese blood type, personality, and who you are go hand-in-hand.

Judging your personality based on your blood is such a common self fulfilling prophecy that dating services and retail products have sprung up in response to it. People use these services and products to help them sort out personality and individual differences. Believe it or not, there’s even a sort of discrimination and blood harassment surround the issue of blood types.

In fact, there’s an entire theory about what kind of person you are based on your blood type. That theory extends into the characters that video game creators create. If you’re the type to scan the forums for a video game that’s popular with Japanese people, you’ll find that the characters are often patterned according to their definition of blood type.

If you were to believe that personality and individual differences had something to do with blood types, you wouldn’t need to donate blood to know if you have A, B, O, or AB blood type. You would remember it and cite it often.

For example, people that have type O blood are confident, self-determined, strong willed, and they tend to be leaders and caretakers. They’re resilient, flexible, optimistic, and they don’t sweat the small stuff. Type O people are even-tempered and make excellent team players. They’re great communicators and they won’t crack under pressure. Blood type, diet, and other features are notable for type O people. It’s believed that they’re better able to digest their foods than other people with other blood types.

Unlike people with type AB blood and people with type B blood, people with type A blood tend to be peacekeepers and peacemakers, and they hate to argue. You’ll find them to be hard-working, conscientious, reserved, patient, and sensitive. They love to be orderly and organized and they may get frazzled easily. In the romance department, they like to take things slow and it takes them time to open up.

Of the A, B, O, and AB blood type profiles, people with type B blood are the creative types in the group. They’re also quite passionate and a little on the selfish side. They’re curious about things but they like to explore on their own terms. Type B people tend to be irresponsible, unforgiving, and fleeting. Other adjectives that describe type B blood type people are self-centered, cold, unpredictable, active, outgoing, adaptable, and they’re loads of fun to be around.

The Japanese people consider people with type AB blood to be an interesting dichotomy. They can be described as critical, indecisive, and forgetful. They’re mysterious and cool and perhaps, a bit odd. They hunger for knowledge, but they tend to be realists at the same time. They’re frank and upfront so you’ll always know where you stand with them.

When you consider the blood type explained according to Japanese culture, blood harassment is a valid issue. The Japanese people have a term for blood harassment called Bura-hara and a social psychologist might tell you that it’s a huge social problem in Japan. People with type B blood tend to be picked on the most for the negative personality and individual differences in the traits associated with type B people.

Frequently Asked Questions (FAQs)

What are the characteristics of a positive blood group?

Some people have a fascination with blood types and believe they determine personality. In Japan and South Korea, there are cultural beliefs that there's a relationship between blood type and personalities. That means that some individuals have personality traits based on their blood. The relationship between blood type and personality may make sense to some, but it's highly debatable.

How does your blood type affect your personality?

Some people have an obsession with blood types. According to the blood type personality theory, there are certain blood type personality traits that a person might carry. It's like blood type horoscopes or astrology. You can figure out what a person's traits are based upon what's in their blood. Blood type personality theory states that someone with a blood type B personality, for example, will be compassionate, curious, extroverted, understanding of others, friendly, and generally positive. When you apply the blood type and personality theory, Type B's are said to be empathetic according to blood type personality theory, but at their worst, they can be selfish. Blood type AB personality is said to bring traits such as creativity, indecisiveness, and adaptability. Those with a blood type O personality are said to be athletic, agreeable, and confident.

Beliefs about blood types can be inaccurate, and the best way to get to know someone is to talk to them, so while learning about these ideas is fun, remember that everyone is an individual and that blood type theory can only tell you so much. Some people fit their blood personality, whereas some do not. Blood type and personality could correspond to one another, or they may not appear to be related at all. It depends on who you ask. Blood type theory is controversial, and many people don't believe it has validity.

Masahiko Nomi wrote a book about blood types and personalities. Nomi did not have a medical background. He believed in blood type personality traits. His son Toshitaka continued to promote his father's theories and runs the Institute of Blood Type Humanics. His goal with the Institute of Blood Type Humanics is to help people get in touch with their inherent strengths.

What does Type A personality mean?

Some people believe that blood type and personality are connected. To have a "type A" personality doesn't have anything to do with your blood type. People with personalities that are referred to as "type A" are perfectionistic, driven, and particular individuals who hold themselves to the highest standard. They're timely and organized. It can be a great thing, but it can also be detrimental for those who aren't able to go easy on themselves. Whereas people who are "type B" are generally relaxed and laid back, those who identify as "type A" are typically rigid in their thinking and can feel a massive sense of stress when things don't go the way this person feels they should have. The blood type and personality of type A dates back to the 1950s. The origin of the term "type A" or "type A personality" was coined by two cardiologists named Ray Rosenman and Meyer Friedman to describe high-stress, rigid, competitive types who they believed were at a higher risk for cardiovascular illness due to these traits. It is true indeed that higher stress levels are a risk for heart disease, so if this personality type resonates with you, it may be useful to use stress relief techniques and talk about any anxieties or pressures you feel in counseling.

Does blood type vary by gender?

Gender and blood type are connected slightly. According to one study, "A significant association between male gender and blood group A was found." That said, females can have type A blood as well. Gender is another facet of the personality and blood type connection that motivates some people to believe in the notion of a self-fulfilling prophecy.

What is the smartest blood type?

Humankind is seemingly always trying to find a new way to determine or define intellect. You may believe that blood type and personality are connected, which may suggest that some blood types are smarter than others. However, that statement would be false. According to scientific research, there's no relationship between blood type and personality. People who have a particular blood type won't be smarter than someone else based on their blood type, but there have been multiple studies conducted to test this theory. Released in 2017, a study held by the Department of Physiology at a medical college in India related academic achievements to blood type and concluded that while there were differences in the scores, there is no absolute correlation between blood type and a person's ability to succeed academically. Intellect varies from person to person, and due to the sample sizes of the studies that have been conducted on this topic, we're unable to infer or make an educated guess on how smart an individual will be based on blood type.

What's the worst blood type to have?

According to blood type and personality theory, there may be more desirable blood types than others; however, if you don't believe that a person's blood type isn't relevant. If you're seeking a match to give blood to or receive blood from, a rare blood type would be the worst one to have. One blood type is not better than another. Be wary of stating that one blood type is worse than another so as not to engage in blood-type harassment.

What is the most powerful blood type?

If you're wondering which blood type has a powerful personality, it depends on who you ask. Some theories suggest that blood type and personality are connected, while others disagree. Those with type O blood have a lower risk of developing certain diseases than those with other blood types, so in that regard, having type O blood may give you a slight health advantage. That said, "powerful" is a term that is subjective and can mean many different things. If you're thinking about blood type and personality, powerful can describe a dynamic individual. However, you may be referring to a person's health and immune system responses. Then it's not about blood type and personality, but rather their physical strength. There are books about blood types that suggest that blood types should eat in a particular way or that people have specific traits based on blood type, but all of these things will be more dependent on factors outside of blood type.

Does blood type affect intelligence?

Again, blood type does not affect intelligence, especially not as much as other factors do. It has been speculated that blood type and personality are linked, which could integrate the variable of intelligence. However, some people don't subscribe to that theory. They believe that blood type and personality do not overlap, and intelligence has to do with other outside influences.

Factors that are more known to affect intelligence are environmental factors such as education, geographical location, womb conditions before birth, and socioeconomic status. Note that there are many different kinds of intelligence and that all kinds are valuable. One person might be book smart, whereas another person will have a high level of emotional intelligence. Having an open mind and seeking learning opportunities is far more likely to influence how smart you are than your blood type is, rather than relying on a blood type and personality theory.

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