What does こちらこそ mean?
こちらこそ is a Japanese noun meaning “it is I who should say so” in English. It is written as こちらこそ in hiragana, and kochirakoso in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
「ごめんね」「こちらこそ、ごめんね」
"I'm sorry." "I'm sorry, too."