kitanju isnly one of many major transfer stations.he jam-packed trains and platforms are not for the faint of heart. trains arrive every two minutes after 7:30 a.m., but they are still crowded. train companies are finding it necessary to expand their aging and overburdened train stations to keep pace with the rising population of the tokyo metropolitan area. the process of suburbanization in many different cities creates a situation in which people move to the periphery to get farther away, to get some more affordable housing, to get to a sort of cleaner area, quieter area, better air quality, and they realize there's going to be a longer transportation haul. then they put pressure upon public agencies to make transportation easier from those areas. so new highways are built, or in the case of tokyo, new subway lines are built or existing subway lines are extended. but what ends up happening this attracts more and me people to the area and the transportation lines-- whether they're rail or subway or roads-- become more congested as a