noun
entrance badge; visitor's card
A badge or card issued to allow entry into a facility such as a company, school, or construction site. Often worn visibly or presented at a gate.
工事現場に入るには入構証が必要です。
You need an entrance badge to enter the construction site.
受付で入構証を受け取ってください。
Please pick up your visitor's card at the reception desk.
Compound of 入 (entry), 構 (premises), and 証 (certificate). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning of an entry permit.