YOU SAID:

I am highly apprechiating your concern on this matter.

INTO JAPANESE

この問題についての懸念を高く評価しています。

BACK INTO ENGLISH

I appreciate your concern about this issue.

INTO JAPANESE

この問題について懸念をお寄せいただきありがとうございます。

BACK INTO ENGLISH

Thank you for your concern about this issue.

INTO JAPANESE

この問題について懸念をお寄せいただきありがとうございます。

BACK INTO ENGLISH

Thank you for your concern about this issue.