Manga and anime advertising posters on a building in Akihabara, Tokyo Unless something happens to boost Japan's birth rate, its population will shrink by a third between now and 2060. One reason for the lack of babies is the emergence of a new breed of Japanese men, the otaku, who love manga, anime and computers - and sometimes show little interest in sex. Tokyo is the world's largest metropolis a
![The Japanese men who prefer virtual girlfriends to sex](https://cdn-ak-scissors.b.st-hatena.com/image/square/95b1276ea499207bd36918cb19571909a8be598c/height=288;version=1;width=512/https%3A%2F%2Fichef.bbci.co.uk%2Fnews%2F1024%2Fmedia%2Fimages%2F70632000%2Fjpg%2F_70632752_otaku.jpg)