Contrary to the problem that there are more men than women in China, according to the Japanese population data released by the Japanese Ministry of Internal Affairs and Communications this year, the total population of Japan is10027110000. In terms of sex ratio, there are 3.452 million more women than men. Many large-scale national surveys show that Japanese people's preference for having girls is becoming more and more obvious. The phenomenon of "men are superior to women" in Japan is often criticized. The Tokyo Women's Support Group believes that "gender equality is still just a slogan." But in fact, most of the gender differences in Japan are reflected in the social division of labor. Take the family as an example. The traditional division of labor in Japanese families is that men work in enterprises and women are housewives. However, according to the survey of Yomiuri Shimbun, more and more Japanese people are beginning to oppose the family life of "men are the masters outside and women are the masters inside". In addition, in politics, female employment and education, Japanese society has also undergone many changes ... Japanese people do not need boys to "carry on the family line". There are some differences between Japanese and China people: the Japanese think "home" is an abstract concept, and in some special cases, blood relationship is not the most important factor connecting family members. Obviously, this is different from China's blood relationship. There is even a simulated blood relationship in Japanese families ... servants who participate in housework in families can also exist as family members. There is also a foster child system. During the Japanese shogunate era, Japanese families adopted the children of ministers and attendants. After modern times, the habit of claiming adopted sons has not changed much. Akutagawa Ryunosuke is an adopted son, and Terauchi Masatake, Gao Qiao You, Kato Ryunosuke and others have also served as prime ministers in politics.