先せん着ちゃく順じゅん

noun

order of arrival; first-come-first-served basis

Used for systems where priority is given according to the order people arrive or apply. Common in event registration, limited-quantity sales, and seat reservations.

• チケットは先せん着ちゃく順じゅんで販はん売ばいします。

  Tickets will be sold on a first-come-first-served basis.

• 座ざ席せきは先せん着ちゃく順じゅんですので、お早はやめにお越こしください。

  Seating is on a first-come-first-served basis, so please arrive early.