*Women only - A system to stop perverts
While the cars reserved for women and schoolgirls disappeared in the middle of the twentieth century, travelers with "wandering hands" unfortunately remained. In a survey conducted in the early 2000s by Tokyo Metropolitan Police and JR Railway Company, two-thirds of women aged 20-40 reported being touched, called chikan (a term in Japanese for both the guilty person and the act of touching someone without their consent), in crowded trains. These results prompted some companies to take action and they started to designate whole cars for female rush-hour passengers, or others all day, but only on weekdays. In 2000, the Keio Line, which connects Shinjuku to the dormitory communities of West Tokyo, was one of the first to offer ladies' cars. It first offered this service for late hours and then during evening rush hours on express trains.
In 2001, JR East followed the example of late hours on the Saikyo line, which connects Tokyo to Saitama Prefecture, which was notorious for the many riders who took advantage of the anonymity of the crowds and the long distances between the stations to perpetrate their attacks. The following year, the same system was applied during rush hours in the evening.