Life underground has grown more mobile-Internet friendly with Tokyo Metro Co.'s trial free Wi-Fi service expanding to effectively all of its subway stations at the start of the month.
By registering for an application called MANTA (Metro Amusement Network Trinity App), commuters can have their smartphone connected to the free Wi-Fi inside Tokyo Metro stations until July 31, when the trial will end.
There are some limitations, as people can access the service only five times a day and never for more than 15 minute per use.