The godmother of manga sex in JapanManga is hugely popular in Japan but critics fear some of it amounts to exploitation A recent UN report weighed into a debate that provokes intense controversy in Japan, by including manga in a list of content with violent pornography. The BBC's Yuko Kato went to meet one of Japan's leading female manga artists, Keiko Takemiya, seen as the woman who opened the floodgates to sexually explicit manga
