Just as there are people who believe in horoscopes and the fact that personality qualities are based on our zodiac sign, there are others who believe in blood type. The Japanese for example, instead of horoscope believe that someone's personality is determined by his blood type (Ketsueki cat).

In Japan, blood types are considered the main determinant of one's personality. This is known as the "Blood Type Personality Theory". Although it is basically just something superstitious, 29% of men and 45% of women out there believe in such a theory. How do they define personalities based on blood type?

Blood group A

Most Japanese have blood type A. According to this theory, most people with this blood type are organized, detailed, rational, reserved, educated, easy to trust, patient and perfectionist. 

They are usually described as introverted, sensitive and easily stressed if things do not go according to plan. They think twice before doing something and try not to openly express their emotions.

Blood group B

Usually these people are known as passionate, cheerful, adventurous, curious, carefree, active, creative and flexible. Although often described as selfish, people with this blood type are the most beloved. They are loyal to their principles and make decisions easily. If they think of something, they do not know how to stop.

Blood group AB

These people have a mix of characteristics. It is therefore often difficult to pinpoint their personality. They can be extroverts and introverts at the same time. Such a man can be just as fond of art as he is of science. They are ambitious, analytical people and always looking for a peaceful environment. Their personality is considered unique as people with AB blood type are rare.

Blood type 0

They believe in themselves, are determined and always see the positive side of things. You can trust them without fear as they are considered very responsible people. They are obsessed with work and indifferent to others because they are self-focused.