Ronin Man is an American citizen who's lived in Japan for over ten years and was married to a Japanese woman. Here's his opinion of what created the herbivore men in Japan based on his understanding of Japanese culture.
Japanese herbivore men: What created them? What can MGTOW learn from them?
One of the main reasons he said was because eighty percent of males at age 35 are only make $19K a year and a Japanese woman won't marry a man unless he's making over $60K a year.
Also, the women in Japan take the husbands pay check and only give him $10 a day for spending money for lunch regardless of how much he makes. He could make $200K a year and he still only gets $10 a day. Often times the wife will have a secret bank account the husband doesn't know about.