YOU SAID:

The way one goes about their business is none of yours

INTO JAPANESE

彼らのビジネスを進める方法はあなたのものではありません

BACK INTO ENGLISH

The way they do business is not yours

INTO JAPANESE

彼らがビジネスを行う方法はあなたのものではありません

BACK INTO ENGLISH

The way they do business is not yours