Why do brothers and sisters get married in Japan?

The reason why this happened is mainly related to the Japanese emperor, because in the early days, the Japanese emperor believed that they must ensure the purity of their blood. Therefore, in the eyes of the Japanese emperor, their royal family Bloodline cannot be spread to the outside world casually, which leads to the fact that within the royal family, they will choose to marry close relatives. Because the Japanese royal family is unwilling to marry commoners, this leads to a very narrow range when they choose their spouses. Even in remote areas, they are their distant relatives and have a certain blood relationship.

Let’s take Emperor Yungong’s son as an example. Emperor Yungong’s son fell in love with his own sister. After Emperor Yungong abdicated, Emperor Yungong's son eventually inherited the new throne. After he inherited the throne, he made his sister his queen. The Japanese custom of consanguineous marriage also began to spread after this incident. Because people see that he, his sister, and his mother are still with each other day and night, and they feel very happy living together. This moved many people, which led to many people imitating it.

But in fact, judging from the current Japanese law, marriage between close relatives is not allowed under modern Japanese law. Marriage between brothers and sisters is even more not allowed. Japanese law requires non-immediate relatives beyond the fourth generation to get married. Of course, in modern times, with the development of science, people have realized the harm caused by incest marriage, and therefore have begun to put an end to this phenomenon. But in fact, in the early days, consanguineous marriage was not just a phenomenon in Japan. This phenomenon existed in many countries.

In ancient my country, there was also the phenomenon of consanguineous marriage. However, the phenomenon of consanguineous marriage was not serious in ancient my country, because Confucianism had a great influence in China in ancient times. Therefore, under the influence of Confucianism, people also realized that consanguineous marriage was very shameful and immoral. Therefore, in ancient my country, there were very few people who chose to marry close relatives.