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Blood type personality theory in Japan : What it says about you?

2020-07-19 by Taka

Blood type personality theory in Japan : What it says about you?

Although there are still a lot of things unknown about the relationships between blood types and personalities, many people in Japan (and also in Korea and Taiwan) believe that checking the blood type helps understand a person’s character. It is not uncommon to be asked “What is your blood type?” in Japan, which might be a strange question for people from western countries. The study lacks evidence but it is an interesting theory and it’s a fun topic to talk about with an Asian friend.
Let’s learn a short history about it and find out what it says about you!

How did it start?

In 1927, Takeji Furukawa (he was a professor at Tokyo Women’s Teacher’s School) published his study about blood type, “The Study of Temperament Through Blood Type” in a scholarly journal. Though he only had ten to twenty people for the investigation and the study lacked credentials, it took off with the public in Japan and many believed it.

Later in 1970s, Masahiki Nomi, who graduated from the University of Tokyo, developed blood type personality theory and published a book called “Understanding Affinity by Blood type”. His study was heavily criticized by the Japanese psychological community because Masahiko only graduated from the engineering department and didn’t have any medical background and the book didn’t include enough scientific evidence.
However, the theory itself was very interesting and the book became a bestseller. Nowadays, discussion of blood types is a popular topic especially when women talk about relationships, and it often appeares in magazines.

Blood types and personalities

Blood type A (about 40% in Japan)

Positive  traits
Responsible
Perfectionist
Wise
Cautious 

Negative traits 
Over-earnest
Obsessive
Stubborn 
The least temperate

According to the theory, people with blood type A are generally friendly and dependable, but sensitive and somewhat reserved. They prefer staying alone than being in a group. They get along well with blood type O people but have difficulties making friends with blood type B.

Blood type B (about 30% in Japan)

Positive traits 
Creative
Active
Optimistic
Easy-going

Negative traits 
Irresponsible
Lazy
Unreliable
Impatient

People with blood type B are active and easy-going. They are social, independent, and like to go their own ways. But on the other hand, they could be irresponsible and selfish. They get along with people with AB blood, and the worst with A.

Blood type O (about 20% in Japan)

Positive traits 
Confident
Strong-willed
Competitive
Athletic

Negative traits 
Arrogant
Cold
Aggressive
Envious

This blood type is the most common in the world. About 40% of people (and about 90% in Latin America!) all over the world have this type.
People with O type are energetic and confident. They are natural leaders and good at caring others. However, they are afraid of being rejected. They sometimes have difficulties expressing feelings and can be sensitive inside. They go along well with Blood type B people but the worst with AB.

Blood type AB (about 10% in Japan)

Good traits
Talented
Rational
Intelligent
Adaptable

Negative traits
Critical
Indecisive
Aloof
Not trustable

Only about 10% of people in the world have this blood type, and they have mixed characteristics of A and B. They are eccentric and talented but can be either genius or psycho. They are adaptable and can go one place to the another easily. Some people see that they are moody and not trustable because of their unpredictability. 
They go well with AB and B ,but not with O.

Some claim that all this is no more than a superstition but it’s often a good topic and fun to talk about. To this day, there are many books on blood type and personality relationships in Japan.

My blood type is AB by the way. How about yours?
Did the study above show your personality?

Thank you for reading today’s post!
See you next time.
Taka

*I’m a professional composer.
You can listen/download my music below.

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Filed Under: Culture, Daily life Tagged With: Blood type personality, blood type personality japan, blood type theory, what is your blood type, 日本の文化, 英語 リーディング, 英語 日本 紹介, 血液型, 血液型 英語, 血液型性格診断 英語で

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Taka/原貴浩

TakaTaka/原貴浩:Composer/Teacher
アメリカ大卒(音楽専攻) 講師歴11年、担当生徒数3,100人以上の元大手英語学校の教務主任であり作曲家。2017年六本木から高山市へ地方創生で移住。多文化共生支援団体 Family Planet Japan 代表 英検1級 TOEIC980 通訳案内士 留学アドバイザー
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