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Why do Japanese care about blood type?


Blood type is an integral part of Japanese culture. Unlike other nations, Japanese people believe that a person’s blood type can reveal their personality traits, compatibility with others, and even their future. Blood type influences everything from job interviews to romantic relationships, and it is not uncommon for people to ask about their blood type as an icebreaker. In this article, we will explore the reasons why Japanese people care so much about blood type.

The History of Blood Type Psychology in Japan

The concept of blood type psychology originated in Japan in the early 1900s. It was first introduced by a psychologist named Furukawa Takeji, who noticed that the personalities of his patients differed depending on their blood types. He published a book on the subject in 1927, which sparked a nationwide interest in blood types and their associated personality traits.

Japanese Snack Box

Blood Types and Personality Traits

Japanese people believe that there are four blood types: A, B, O, and AB. Each blood type is associated with a particular set of personality traits. For example, people with blood type A are said to be organized, detail-oriented, and sensitive. Those with blood type B are thought to be creative, independent, and passionate. People with blood type O are seen as outgoing, confident, and optimistic, while those with blood type AB are believed to be rational, calm, and adaptable.

Blood Types and Compatibility

In Japan, many people believe that blood type can determine compatibility in relationships. For example, it is commonly thought that people with blood type A are compatible with those who have blood type AB or O, while those with blood type B are compatible with people who have blood types B or AB. People with blood type O are said to be compatible with any blood type except AB.

Blood Type Horoscopes

Just like horoscopes in Western culture, blood type horoscopes are popular in Japan. These horoscopes use a person’s blood type to predict their future and offer advice on everything from career choices to love life.

Blood Type and Employment

In Japan, some employers take a person’s blood type into account when making hiring decisions. This practice is known as “blood typing” and is based on the belief that certain blood types are better suited for certain jobs. For example, people with blood type A are thought to be best suited for administrative roles, while those with blood type B are seen as better suited for creative jobs.

Blood Type and Health

In addition to personality traits and compatibility, some Japanese people believe that a person’s blood type can impact their health. For example, people with blood type A are believed to be at higher risk for stomach cancer, while those with blood type O may have a higher risk of developing ulcers.

Criticism of Blood Type Psychology

Although blood typing has been widely accepted in Japan for decades, it has also been criticized by some as pseudoscience. Critics argue that there is no scientific evidence to support the idea that personality traits or compatibility can be determined by a person’s blood type.

The Influence of Media and Pop Culture

Blood typing has become such an integral part of Japanese culture that it is often featured in movies, TV shows, and manga (Japanese comics). This exposure has helped to perpetuate the idea that a person’s blood type is an important factor in determining their personality and compatibility.

Regional Differences in Blood Type Beliefs

While blood typing is widely accepted throughout Japan, there are regional differences in how much importance is placed on it. For example, people in Tokyo tend to be more skeptical of the idea than those in other parts of the country.

Blood Type Discrimination

Although most Japanese people view blood typing as harmless fun or an interesting conversation topic, there have been instances of discrimination based on a person’s blood type. Some employers have been accused of refusing to hire or promote workers based on their blood type.


In conclusion, the Japanese fascination with blood types may seem strange to outsiders but is deeply ingrained in their culture. Whether it is determining personality traits or predicting compatibility in relationships or employment decisions – it plays an important role in daily life. While critics may question its validity as science – its popularity continues to grow unabated in Japan.

What is the importance of blood type in Japanese culture?

According to Japanese beliefs, a person’s blood type is a critical factor in determining their personality and compatibility with others. It also has an impact on their work and professional life.

Do Japanese discriminate on blood type?

In Japan and Korea, discrimination based on blood type has been a problem for many people. Despite warnings against it, employers still ask for blood type during interviews and some schools have even separated children based on their blood type.

What is Japan’s favorite blood type?

In Japan, Type O blood, which is the most common blood type, is considered the most desirable.

Why do Japanese characters list blood type?

In certain forms of fiction, such as manga and anime, character blood types can be used as a quick way to convey information about their personality and potential relationships with other characters. This shorthand provides audiences with basic insight into who the characters are and how they might interact with others.

What does 0 blood type mean in Japan?

Individuals with type O blood are often considered optimistic and natural leaders, as they are realistic and willing to take charge in a group setting. They enjoy taking care of others, especially those who are younger than them. This trait is known as “rakkanshugi” in Japanese culture.

What is the rarest blood type for Asians?

Some ethnicities have a higher occurrence of rare blood types than others. For example, Latin Americans have a rarity of 0.2% for AB-negative blood type, 1% for B-negative, and 2% for both A-negative and AB-positive. Meanwhile, Asians have a rarity of 0.1% for AB-negative, 0.4% for B-negative, and 0.5% for A-negative.

It is important to note that not all Japanese people take blood typing seriously. There are many who view it as nothing more than a superstition or a fun conversation topic. However, the fact remains that blood type psychology has had a significant cultural impact in Japan and is still widely discussed and debated.

Despite the criticism it receives, blood typing has become an integral part of Japanese identity, with many people identifying strongly with their blood type personality traits. In fact, some Japanese dating websites even allow users to filter potential matches based on their blood type.

The popularity of blood typing in Japan has also led to the development of various products catering to specific blood types. For example, there are books, magazines, and even food products marketed towards people with certain blood types.

In recent years, there have been efforts to debunk the myths surrounding blood type psychology and promote a more scientific approach to personality assessment. However, it remains to be seen whether these efforts will have any significant impact on Japanese culture, where blood typing has been deeply ingrained for nearly a century.

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