The number of 7-year-olds is by far the highest at 732. By the age of 10, it is about half, and it is no different from an adult.
Yumi Oka, a specially appointed researcher at Osaka University's Graduate School of Accidents, works to prevent accidents among children. Oka believes that the decrease in accidents after 7 is the result of children who do not understand the rules having scary experiences with "near-misses" and becoming more cautious in their actions.