noun, noun or participle which takes 'suru'
closing of a station/bureau/office
Used for the permanent or temporary closure of a broadcasting station, post office, or similar public-service office.
その郵便局は来月閉局する予定だ。
That post office is scheduled to close next month.
ラジオ局の閉局が発表された
The closing of the radio station was announced.