empty ballot box confirmation
A formal procedure in Japanese elections: the first voter at a polling station confirms the ballot box is empty before voting starts. This term is domain-specific to election administration.
At the polling station, the first voter performs the empty ballot box confirmation.
Empty ballot box confirmation is an important procedure to ensure the fairness of elections.
Compound of 零票 (zero ballots) and 確認 (confirmation). The term is a modern technical coinage used in Japanese election law and practice.