I can't imagine Japan banning anything. Generally it is a free and easy society. One can pretty well do anything as long as you don't scare the horses. I must admit that most of their sexual art is comic books, so maybe the real thing upsets some people. Who I can't imgine. My daughter lives in Japan, and she recently wrote satire on Japanese Society.
Reference.
Author, "Sweet Daruma, a Japan satire"
selected for study at the University of California and available now from Amazon.
Visit
www.sweetdaruma.com today!
Blantant plugging!
Durgan.