> Japanese people think Buddhism is a thing you do at funerals.

Buddhism, and Zen especially, permeate Japanese culture very deeply. Japanese aesthetics, architecture, landscape design, visual art, calligraphy, the tea ceremony, and the martial arts, have all been strongly influenced by Zen. And it's all over pop culture, too—just think of how pervasive Daruma dolls are—that's Bodhidharma, the founder of Zen. Sure, Buddhism is at funerals, but it's everywhere, else, too.

Your statement may be true but so is the grandparent's. (Although I agree that there isn't much about not having sex; mainly you hear about monks don't eat meat, or at least not while people are looking)