What it means
につき attaches to a noun and indicates a cause or reason, meaning “because of” or “due to.” It can also mean “per” when stating a rate or allocation. This form is especially common in formal notices, announcements, regulations, and written instructions, and it gives the statement an official or impersonal tone.
Usage note
につき is considerably more formal than ordinary causal expressions such as ので and から, so it is not normally used in casual conversation. Do not confuse its causal use with its “per” use; the surrounding noun and sentence meaning determine the interpretation.
Example sentences
館内改装工事につき、来週月曜日は図書館を休館いたします。
Due to renovation work inside the building, the library will be closed next Monday.
悪天候につき、本日の遊覧船は運航を中止いたします。
Due to bad weather, today's sightseeing boat service will be canceled.
応募者多数につき、受付を予定より早く締め切