Provided is a closure device for closing a soft packaging container, the closure device including a holding section configured to hold a soft packaging container, a dispense section configured to dispense contents of the soft packaging container, a closure section configured to close the soft packaging container, and a control section configured to control timing for closing the soft packaging container by the closure section. The control section may include an acquisition section configured to acquire time information related to timing for closing the soft packaging container. Provided is a soft packaging container for accommodating contents, the soft packaging container including a main region for accommodating the contents, and an extension region provided by being extended from the main region.