YOU SAID:

Before performing any duties, an interpreter or a translator shall solemnly declare to do so faithfully, independently, impartially and with full respect for the duty of confidentiality.

INTO JAPANESE

任意の職務を実行する前に、通訳または翻訳者厳粛に忠実に、独立、公平と機密性の義務の完全な尊重を宣言しなければなりません。

BACK INTO ENGLISH

Before performing any duties, interpreters or translators solemn and faithful in full respect of the independence, impartiality and confidentiality obligations must declare.