Japan's comics and cartoons - known as manga and anime - are a huge cultural industry and famous around the world. But some are shocking, featuring children in sexually explicit scenarios. Why has Japan decided against banning this material?
It's a Sunday afternoon in Tokyo and Sunshine Creation is in full swing. Thousands of manga fans, mostly men, crowd into an exhibition centre, poring over manga comic magazines laid out for sale on trestle tables snaking around the rooms.
Posters of elfin-faced, doe-eyed cartoon heroines, many of them scantily clad and impossibly proportioned, turn the cavernous space into a riot of colour.
"This area is mainly dealing with sexual creations," explains Hide, one of the event organisers.
We stop at one table where the covers on display feature two topless girls. To my eyes they look to be in their early or pre-teens, and the stories show them engaged in explicit sexual acts.
Several other stands are selling similar material. It would certainly be considered controversial, and possibly illegal, in the UK, Australia or Canada, but here it's no big deal.
Did none of the sites (Crunchyroll and such) pick it up, really? 
