That tap in and out system causes unexpected issues sometimes. Many subway stations in Tokyo have different extrances for different directions that are not conn

That tap in and out system causes unexpected issues sometimes. Many subway stations in Tokyo have different extrances for different directions that are not connected underground. Once I entered such station for a train that went in a wrong way and when I tried to exit gates didn't let me. It was unmanned station so it took me a while to find an intercom and explain my issue to a person so they can unblock me.