expression
take this opportunity (to apologize, thank, explain, etc.)
A set phrase used to preface an apology, thanks, or explanation, often in formal or public settings. Literally 'borrowing this occasion/place'.
この場を借りて、皆様に心よりお礼申し上げます。
I would like to take this opportunity to express my sincere gratitude to everyone.
この場を借りて、先日の失礼をお詫びいたします。
Allow me to take this opportunity to apologize for my rudeness the other day.
Similar in meaning but more neutral and less formal; can be used in everyday conversation.
A set phrase combining この場 (this place/occasion) and 借りて (te-form of 借りる, to borrow), literally 'borrowing this occasion'.