がてら

JLPT Level: N1
Meanings

On the occasion of

While … as well

While … (one is) at it

During

Along the way

Usage

名詞 + がてら

Explanation
がてら is used when you do something as a secondary purpose while you are going somewhere or doing another activity. It often describes small, practical actions taken 'on the way' or 'while at it.' It is casual and commonly used in everyday speech.
散歩がてら、図書館へ寄って本を返してくる。
さんぽがてら、としょかんへよってほんをかえしてくる。

While taking a stroll, I’ll swing by the library and return a book.

買い物がてら、郵便局にも行ってくる。
かいものがてら、ゆうびんきょくにもいってくる。

On the way to the store, I’ll also drop by the post office.