expression
Authorized Personnel Only; No Unauthorized Entry
Fixed phrase used on signs to restrict entry to authorized persons. Common in construction sites, offices, and restricted areas.
このドアには「関係者以外立入禁止」と書いてある。
This door says 'Authorized Personnel Only'.
工事現場には「関係者以外立入禁止」の看板が立っていた。
There was a sign saying 'No Unauthorized Entry' at the construction site.
A shorter sign meaning 'No Entry' or 'Keep Out', without specifying authorized personnel. 関係者以外立入禁止 explicitly allows authorized persons.
Compound of 関係者 (authorized person), 以外 (except), 立入 (entry), and 禁止 (prohibited). A set phrase used on signage.