Namahage
One of the purposes is to advise children to obey their parents and to behave themselves.  They say  "Are there any crybabies around?" or "Are naughty kids around?" in the local dialect.  If parents want Namahage to encourage or tell off their children by giving a specific original way, parents can ask them in advance to give special lessons to their children.  It lasts until children heavily cry or leave their house.