Japanese phrase
二度と同じことがないようにします。 ni do to ona ji ko to ga na i yō ni shi ma su
Meaning
I will make sure this never happens again.
When to use it
Promises that the same problem will not happen again. It sounds sincere and is often used after an apology when taking responsibility.
Example dialogue
本当に申し訳ありません。 hon tō ni mō shi wake a ri ma se n
I am truly sorry.
二度と同じことがないようにします。 ni do to ona ji ko to ga na i yō ni shi ma su
I will make sure this never happens again.