Order of arrival; a first-come, first-served basis — service or allocation given in the order people arrive.
チケットは先着順で配りますので、お早めにお越しください。
Tickets will be distributed on a first-come, first-served basis, so please come early.
定員に達したら先着順で締め切ります。
Once capacity is reached, we'll close registration on a first-come, first-served basis.
この企画は先着順なので、早めに並んでください。
This event is first-come, first-served, so please line up early.