All of the children and two of their teachers were taken to hospital for treatment, NHK added, but two - a boy and a girl, both two years old - died soon after.
Television footage showed two cars slewed at opposite corners of a crossing and brightly coloured school bags scattered on a sidewalk. The children had been returning from an outing to a lake, NHK said.Rapidly ageing Japan has recently seen a series of fatal car accidents involving elderly drivers. In April, a mother and her three-year-old daughter were killed after a car driven by a 87-year-old man ploughed into people on a crosswalk.