http://factsanddetails.com/japan.php?itemid=623Children are sometimes punished by being locked out of the house. Children often cry with fierce shrieks when this happens."From our bedroom window," Downs wrote in the Washington Post, "I saw Satoshi, a little boy of 5 or 6, pounding on his front door and frantically screaming to be allowed back in. Over and over again he repeated that he would do what she wanted only 'Please mother, let me in. Please! Please!' I have never heard a child as desperate as that boy. The threat of separation from his mother was profoundly disturbing, and it was clear he was willing to do anything to avoid it."
The rest of the article would have some insight on why this works, like:
Watching a group of young children at a playground long-time Tokyo resident Lavina Downs wrote in the Washington Post: "None of the toddlers would ever stray more than 20 yards from their mother; an invisible cord seemed to pull them back. The women chatted with each other but rarely spoke directly to their children. Nevertheless, I seldom sensed anything but affection and trust, often spiced with good humor, between mothers and children.” [Source: Lavinia Downs, Washington Post, April 3, 1994]
If that is true, being locked out of the house would be pretty effective punishment.