The race of the Japanese emperor is a special race in Japan, because it symbolizes not only the religious and political leaders in Japan, but also the status of the gods. Therefore, if you gain something, you will lose it, so he has no surname, because most surnames in Japan are compound surnames, such as Yamamoto and Inoue, but the royal family has no surname, so it is called the Imperial Family in history.

Japan's direct royal family has no gender, because they follow their father's surname when they are young, so they have no gender. If a woman marries a commoner and a commoner, her surname will automatically follow the gender of the man she marries. If a woman marries a member of the royal family, she will keep her original name. Although they don't have surnames, they also have names. There is a addressing system, that is, they were originally related by blood.

Some members of the Japanese royal family have also been reduced to vassal status, which means that there is no sex in the Japanese royal family. However, if his son is reduced to an ordinary courtier, he can have sex. For example, three of Japan's four major surnames are illegitimate children of the Japanese emperor. When he was reduced to vassal status, he had one surname and another Fujiwara, which were called the four major surnames in Japan, that is to say, these four surnames were the most people.

Few members of the royal family participate in the current political system, because the royal emperor has become more of a symbol of Japan, just like the Queen of England or many spiritual leaders who have retained the monarchy. They no longer have real power, but other parts, such as their livelihood and economic resources, rely more on the state, which will provide them with economic support, and the state will be responsible for supporting the entire surname of the emperor and his descendants.