Everyone travels by subway in Tokyo. Sometimes it is very crowded. People traveling in a subway are very respectful. They do not talk very much and many times people sleep while riding the subway.
Sometimes the subways are very attractive. One photo shows a beautiful wall mural. One photo did not turn out very well but the entire ceiling of the subway was lit up with black lights and the ceiling had all the stars above. When the sun came up the black lights turn off and you don't see the stars anymore.