KanjiJLPT N1
Journey

journey, travel, chase away, let go, going, before, formerly

Mnemonic

A postman kneels before the lord, who hands him a sealed scroll. 'Deliver this to the eastern border,' the lord commands. 'It is a one-way journey—do not look back.' The postman rises, steps forward, and marches into the horizon without a single glance behind him.
Additional thoughts
Picture the postman walking the radical's leftward strokes as a path, with the lord's seal propelling him forward. One-way journey = no return, only forward motion.
Quick recall
The postman obeys the lord's command and sets off on a one-way journey, never looking back.

Details

The keyword for 往 is journey. This kanji conveys the idea of going somewhere, traveling forth, or proceeding along a path toward a destination. It carries a sense of forward movement and progression, often implying a one-way trip or departure rather than a round trip. In broader usage, it can also refer to the past, as in times that have "gone by," linking the concept of traveling forward with the passage of time.
On'yomi
おう
Kun'yomi
い.く、いにしえ、さき.に、ゆ.く