Herbivore men , or grass-eating men, is a Japanese term to describe the asexuality

Asexuality

Asexuality , in its broadest sense, is the lack of sexual attraction and, in some cases, the lack of interest in sex. Sometimes, it is considered a lack of a sexual orientation...

 and personality traits of men who are "generally passive toward relationships and attracted to pastimes traditionally attributed to females." This term was created in 2006 and became a buzz word in 2008-9. Several books on herbivore men were published during this period.

This phenomenon has yet to be officially documented in other Asian nations, but the increase in herbivore men has spread over much of Asia along with Japanese culture. In China the first report on Japanese herbivore men appeared in the state media Xinhuanet on December 1, 2008, and Masahiro Morioka

Masahiro Morioka

Masahiro Morioka is a Japanese philosopher, who has contributed to the fields of philosophy of life, bioethics, gender studies, media theory, and civilization studies. He is a professor of philosophy and ethics at Osaka Prefecture University, Osaka, Japan...

's book Lessons in Love for Herbivore Boys was translated into Traditional Chinese in 2010 in Taiwan.