On the Gran Class Cars, there are even further amenities added to those of the Green Cars, with even further reclining and luxurious seats and even more leg space. Gran Class Cars are often formatted in a 2x1 seating arrangement so that each passenger either has easy aisle access or an individual seat.

On the Japanese Shinkansen in 2026, the Green Car is the equivalent of "Business Class," while the Gran Class is the "First Class" or "Ultra-Luxury" tier. A Green Car offers a 2+2 seating configuration with wider, plush seats, more legroom, and built-in footrests compared to the 3+2 layout of Ordinary cars. It is quieter and often features reading lights and power outlets at every seat. Gran Class, available on newer models like the E5, E7, and W7 series, takes this to an extreme level with a 1+2 layout, providing only 18 seats per carriage. The seats are fully automated, leather recliners that tilt back significantly without disturbing the person behind. Passengers in Gran Class receive a dedicated cabin attendant, a "gourmet" bento meal (often designed by top chefs), unlimited alcoholic and non-alcoholic beverages, and a set of slippers and eye masks. While a Green Car ticket is a reasonable upgrade for comfort, Gran Class is a premium "experience" ticket that can cost double the price of a standard seat, aimed at those seeking the absolute pinnacle of rail travel.