noun
green-car ticket; first-class train ticket
A ticket for the Green Car (first-class carriage) on JR trains in Japan. Often purchased as a supplement to a regular fare ticket.
新幹線のグリーン券を買って、ゆったり座れた。
I bought a green-car ticket for the Shinkansen and was able to sit comfortably.
From English 'green' + 券 (ticket), referring to the green-colored stripe on first-class carriages of Japanese National Railways.