All agree that there are men and there are women. The word might not exist in some languages, and when it does, the meaning is not what the Western writings on it imply. Even in English, its first meaning in most dictionaries is as a grammatical term. It's well established that a great deal of social and political energy goes into creating masculinity and femininity. Look at your magazine stand.
Magazines tell women how to be beautiful, or men how to be successful in business.
The very demand for that kind of knowledge suggests that manhood and womanhood is learned and applied. In other words, gender is a social construction. The difficulty in translating gender from West to East reflects the reluctance of people to admit to the growing awareness that gender does exist, that it is present in every country, every city and neighborhood, in the workplace, and at home. We were each born into our distinct culture and take on the different values, attitudes, and behaviors that shape our identities. Our sexual or gender identities are no different.