Hiroki Yoshida, a father of three children aged 6, 8 and 11, suddenly became a single father four years ago, when his wife walked out without warning.

He was so shocked he cried for two weeks straight.

¡°I couldn¡¯t get her off my mind for the next two weeks, but then I thought to myself I had to face reality for the sake of the children,¡± said Yoshida, 37, in an interview with The Japan Times at his four-bedroom apartment in Konosu, Saitama Prefecture. Yoshida did not move his family after his wife left.