Repayment of a favour or kindness; doing something to show gratitude or to repay an obligation.
彼は両親への恩返しとして、家を建てた。
As a way to repay his parents, he built a house for them.
昔助けてもらった人に恩返ししたい。
I want to repay the person who helped me long ago.
地域に恩返しするためにボランティアを始めた。
I started volunteering to give back to my community.