noun
starting station; first station; departure station
Refers to the station where a train or line originates; often used for the first station on a route or the station where a particular train service begins its run.
この電車の始発駅は東京駅です。
The starting station for this train is Tokyo Station.
始発駅から終点まで乗り通
I rode from the first station all the way to the terminus.