Why do Japanese people like to talk about personality with blood type?

Japanese people are convinced that blood type determines personality. Young people in Japan especially like reading books about blood group constellations. English letters A, B and O become the code of "Who are you?". . Since ancient times, human beings have always been superstitious. For example, some people believe in the recent popular constellations, divination or tarot cards. However, in Japan, the most technologically advanced country in Asia, we are convinced that a person's blood type can best reflect his personality, strengths and weaknesses. Recently, this superstition has become more and more serious and has been accused of causing exploitation and discrimination. Nowadays, many people, whether looking for a job, a partner or even studying, rely on their blood type. Scientists and psychologists accuse the general public of being superstitious, and criticize books and websites describing blood types for misleading people. In fact, the protein content of a person's blood type does not determine a person's personality. In a word, people's association between blood type and temperament is not only lack of scientific proof, but also fundamentally wrong. According to a newspaper poll, 20% of the population in Japan firmly believe that blood type affects their personality. Since this concept was introduced by Nazi Germany supporters and accepted by the Japanese military government in the 1930 s, Japanese people have some ideas that blood type affects their lives. At the same time, South Korea also spread this idea. In Japan, almost everyone will be asked what blood type they belong to, so there is no need to make a fuss. For example, Japanese Prime Minister Junichiro Koizumi's blood type has always been called Type A 190 1 Discovery, which has become a major breakthrough in medical history. However, the German Nazi Party took advantage of the topic, claiming that most Germans have superior blood types A and O, far superior to Jews and Asians with blood types B.