The Chief Cabinet Secretary of Japan (内閣官房長官 naikaku-kanbō-chōkan) is a Minister of State who is responsible for directing the Cabinet Secretariat of Japan. The main function of the Chief Cabinet Secretary is to coordinate the policies of ministries and agencies in the executive branch. The Chief Cabinet Secretary serves as the government's press secretary, conducts policy research, prepares materials to be discussed at cabinet meetings, and, in time of national crisis, coordinates ministries and agencies of the executive branch. The Chief Cabinet Secretary is customarily nominated as the first in line to serve as temporary Acting Prime Minister in case the Prime Minister is unable to serve due to death or other grave reasons until a new Prime Minister is appointed. The Chief Cabinet Secre