The express trains in Japan (Shinkansen) are fast, but you still spend some time on the train on the long routes. The rows of seats are laid out like in an airplane - but you have significantly more legroom. Someone regularly comes through the wagons and offers food and drinks. It is popular to stock up on provisions at the train station. There are corresponding stores that offer, for example, a large selection of bentoboxes (see Fig. 1). A bentobox is a box with several compartments, in which different dishes can be found.
Travelling by train in Japan is really fun. As a tourist you have the opportunity to buy a credit for the Japan Rail Pass outside of Japan. In Japan, the Rail Pass will be issued. Now you can drive as much and as far with the Japan Railway as you want. Other lines cost extra.