The most uncomfortable marriage system in Japan leads to the marriage of close relatives of brothers and sisters, and children can't tell who their father is.

As we all know, in our country, marriage is forbidden between lineal blood relatives and collateral blood relatives within three generations, only in modern times. There seems to be an idea in ancient times that rich water will not flow out of the fields. The elders always marry the next generation of cousins, because they think they are childhood friends and the two families are relatives themselves. After marriage, they can be close and their children's bloodline will be more pure. With the development of the times, people now understand genetics, and consanguineous marriage has only a bad influence on the next generation.

Although both Japan and China are in Asia, many cultural customs are still different. In some parts of Japan, the custom of consanguineous marriage still exists, but it is not prohibited by national laws.

In Japan, the emperor is the symbol of supreme power. It is said that many years ago, an emperor loved his sister deeply, but he was puzzled and even reviled by the world. But the emperor married his sister regardless of what others said. Although they are puzzled, they still live such a life, which can be said to be a very sad love story. Later, I thought that the emperor could marry his sister, and there was nothing wrong with marrying his closest relatives, so a large number of people respected this idea.

In Japan, there is also a very wonderful marriage system called wife-visiting marriage. A wife does not live with her husband, but in her own house. They are husband and wife, but there is no engagement. The husband wants his wife to live in her house for a period of time. After having a child, the child also lives with her mother, and the husband needs to pay alimony. Because marriage is not binding, it will lead to the wife living with another man, and it is possible to give birth to a son who is not the husband, but the husband will raise the children for others without knowing it.