TOKYO -- The population in Tokyo's waterfront areas has ballooned in recent years and is only expected to keep climbing after the 2020 Olympics, ratcheting up pressure on the local government to expand its already crowded public transit system.
At around 8:30 one March morning, the subway platform at Tokyo's Kachidoki Station was completely filled with locals boarding trains and disembarking passengers heading to nearby offices. The sidewalk at an intersection above the station was also packed, with some even walking on the edge of the road.
