yes cs it's over populated it depends on where it is
They use trains mostly. Here is a video about trains in the Tokyo Area.
In most instances, no. Trains can get crowded, but certainly do not always require that one be 'pushed' or 'crammed' into the train. There are instances such as rush hour in extremely busy stations, however, where it may be necessary.
Japanese Trains
Bullet trains were first invented in japan!
Cars, and subway trains.
Shinkasen
Translogic - 2010 Japan IV Trains was released on: USA: 20 December 2010
Juku, often translated as "cram school" in English.
not enough money for schools since there were so many earthquakes.
Shinkansen - The bullet train of Japan
In Tokyo, trains are a popular way of commuting distances. Other ways include buses, biking, or walking.
speed trains and trains to transport people