The Japanese men happy with 'virtual girlfriends'
23 October 2013 Last updated at 17:55 BST
Japanese women are having fewer babies than ever before - and if this continues, by 2060 the population of the world's third largest economy will shrink by a third. But are immature and commitment-averse Japanese men to blame?
BBC Presenter Anita Rani goes to Japan to meet Nurikan and Yuge, who are content with "virtual girlfriends" Rinko and Ne-ne who they take on dates, and buy cakes to celebrate their birthdays.