departing Tokyo
Used in transportation contexts to indicate that a train, flight, bus, etc. originates in Tokyo. Often seen on tickets, schedules, and signs.
The Shinkansen departing Tokyo is at 6 a.m.
This ticket is for a trip from Tokyo to Osaka.
I rode the Tokyo-departure, Osaka-bound shinkansen.
I plan to take the Tokyo-departing shinkansen that leaves at 9 o'clock.
東京発 means the vehicle leaves from Tokyo, whereas 東京着 means it arrives in Tokyo, so the two are easily swapped despite opposite meanings.
Compound of 東京 (Tokyo) and 発 (departure). The suffix 発 is commonly attached to place names to indicate the point of departure.