In the developed nations which Europe and Taiwan, you can carry a bicycle on the train, as it is. However, Japan is a developing country, and you must to separate your bicycle and put it in a bag. When it is a common bicycle, you have to take off the wheels and the steering stick to pack it. So in Japan, folding bicycles are widespread.
It has small tires, and can double over a steering post and frame, you can pack it in three minutes.

In the Japanese language you can express 'A trip where you bring a bicycle in a bag on the train and cycle from the station' single word. It is: "Rinkoh".