One of the differences between China and Japan is the subway system. In China, the trains only travel along their designated line. In Japan, a subway car will transfer among multiple lines. In China, the train stops at designated points on the platform allowing the doors to line up with the corresponding markings on the ground. In Japan, it just stops at the station and people line up at the doors wherever they might be. In China, getting from the station to where you want to go usually requires some walking. In japan, probably because they have over 600+ stations, you can get exactly where you want to go. In China, subway lines are designated by numbers, which is simple. In Japan, every line has a different name, which is confusing if you aren’t accustomed to them. However, and this might be the deciding factor, Japan has public water fountains in the middle of the subway platform.