That&#x27;s a tough commute to school.  The kid isn&#x27;t just taking a train. The kid has to take the Yamanote line, one of Tokyo&#x27;s busiest lines, and change at Shinjuku station, the world&#x27;s busiest transport hub.<p>Japan has very low speed limits in dense areas: 40km&#x2F;h in cities, 30km&#x2F;h on side streets.  That reduces the risk to pedestrians a lot.