For a while back in the 1970s, there was a scheme using platform tickets.

Person A in Tokyo and Person B in Kyoto (or any other distant destination) would each buy a platform ticket (intended for people who were seeing someone off or helping with luggage). Person A would leave first, and ride to Kyoto, sitting in jiyuuseki and hiding out in the toilet when the conductor came through to check tickets.

At Kyoto Station, Person A and Person B would exchange platform tickets. Person A would exit Kyoto Station using Person B's platform ticket. Person B would board the next Shinkansen for Tokyo, also sitting in jiyuuseki and evading the conductor. Upon arrival in Tokyo, Person B would use Person A's platform ticket to exit Tokyo Station.

Eventually, the then-JNR caught wind of this scheme and without any public announcement started putting time stamps on platform tickets and instructing the ticket takers (this was before mechanization) to look at the time stamps on all platform tickets that came through.

People who came through the turnstile after apparently having spent seven hours on the platform were pulled aside, questioned, and fined heavily, and that was the end of that scheme.