Most shinkansen trains in Japan offer seats in two classes, which are typically found in separate compartments. A newest class has recently been added.
Ordinary
Like the name suggests, ordinary seats are the regular seats found on all shinkansen trains. Although the size and leg room of ordinary seats varies between train sets, ordinary seats are generally comfortable and offer generous leg room. They usually come in rows of 3x2 seats. Seats recline and have tables, magazine pockets and open overhead shelves. Some newer train sets have electrical outlets installed along the walls.
Green Car
Comparable to business class on airplanes, green cars offer seats that are larger and more comfortable than ordinary seats and offer more leg room. The seats are arranged in rows of 2x2 seats. Green Cars tend to be less crowded than ordinary cars. The seats are often equipped with a foot rest, reading light, electrical outlets (for aisle and window seats) and a seat warmer, although this varies from train set to set.
Green Class
The Gran Class is available on the new train sets of the Tohoku Shinkansen. These seats are comparable to first class airline seats. Gran Class offer seats that are even more spacious and comfortable than Green Car seats (in rows of 2x1 seats) and additional amenities and services.
All seats on shinkansen trains can be turned by 180 degrees, allowing travellers to always face forward. The seats are turned by the staff at the terminal stations, but can also be turned by passengers, for example, to create a group of four or six seats facing each other. All shinkansen are equipped with multiple toilets, western and Asian. Outside the toilets are wash corners with sinks and large mirrors.