Shinjuku station, considered the busiest in the world, is much much more exciting than Yokohama station. The most exciting thing about it is getting lost. Even if you think you know what you are doing, attempting to cross from one side to the other without going through a ticket barrier can be a disorientating and distressing experience, although the sense of achievement upon arrival at the intended destination before closing time makes it worth the agony. This photo was taken near the barriers to one of the private lines. People were walking unusually fast. Probably they were trying to look as if they knew where they were going.