But even then, most of the "sprawl" is still very dense by American standards, a lot of the suburban areas have comparable population density to Boston or SF.
Is this the worst of the worst? ie- only the few most congested stations experience this during peak hours on a particularly bad day?
Or is it relatively expected? ie- most major stations will experience this during peak hours on an average day?
It's interesting to experience once on vacation because you planned to go to the airport during the morning. It's something else entirely to do it everyday in a stuffy suit until you retire.
However that level of travel only happens in the morning. Overtime culture spreads out the number of people leaving after work, even though technically everyone should get off around the same time.
Going to Tokyo for the evening is mostly out, since the train connections at night are terrible and a taxi will hit you with 200 - 250$.
Nevertheless it definitely beats the Shinjuku early morning rush hour with heavy luggage experience, which really is pretty fucking dreadful.
But I did experience a very, very packed train once while I was there, taking a commuter express line out of the city...at 9pm.