Are you claustrophobic? Need a lot of personal space? I guess this means that the Tokyo Metro is one place that you should stay away from Well, honestly it was not that bad when we went to Tokyo a few years back (see our trip report on http://gardkarlsen.com/japan_tokyo.htm ) but there have been lots of reports of women being felt up on the subway and hence some of the cities in Japan have introduces female only cars on the subway systems. But as this video on YouTube shows it can get crowded on the subway in Japan.