こちらこそ

Idiom

 * 1)  I'm the one that should really be saying that.
 * literally: this way, for sure; as in the thanks/apology should really be going this way (your way)
 * A: 「どうもありがとう. 」 B: 「こちらこそ. 」
 * A: "Dōmo arigatō." B: "Kochira koso."
 * A: "Thank you very much." B: "No, thank you."
 * A: 「ごめんなさい. 」 B: 「いいえ、こちらこそ. ごめんなさい. 」
 * A: "Gomen nasai." B: "Īe, kochira koso. Gomen nasai."
 * A: "Forgive me." B: "No, I'm the one that should be sorry. Forgive me."