We asked where the train was going, but they had no idea. They decided to get off and just catch the next train in the opposite direction. However, the train they boarded wasn’t going to Yokohama.
After spending the rest of the day lost in the Japanese train system, they found a helpful commuter. This good Samaritan ended up accompanying them all the way back to Yokohama and got them on the correct train to Tokyo.
They laughed and said it was an experience, but were also a bit upset that they missed an entire day of sightseeing and their chance to visit the museums.
All this could have been prevented with a simple tool and some advanced preparation. Once you understand the rail system, it’s actually quite easy to navigate.