adverb
under the guidance of; under the leadership of
Used to indicate that an action is carried out under someone's direction or supervision. Often followed by a verb describing the action taken.
彼は経験豊富な先輩の指導の下に、新しい技術を習得した。
He mastered the new skill under the guidance of an experienced senior colleague.
このプロジェクトは部長の指導の下に進められている。
This project is being carried out under the leadership of the department head.