The Cabinet of Japan is the chief executive body of the government of Japan. It consists of the Prime Minister, who is appointed by the Emperor after being nominated by the National Diet, in addition to up to nineteen other members, called Ministers of State.
The Prime Minister is nominated by the National Diet, while the remaining ministers are appointed and dismissed by the Prime Minister. The Cabinet is collectively responsible to the National Diet and must resign if a motion of no confidence is adopted by the National Diet.
Under the Constitution of Japan, Cabinet ministers are appointed after the selection of the prime minister. A majority of the Cabinet, including the prime minister, must be members of the National Diet, and all members must be civilians. Under the Cabinet Law, the number of Cabinet Ministers (excluding the prime minister) must be fourteen or less, but this may be increased to nineteen if a special need arises. If the Cabinet collectively resigns, it continues to exercise its functions until the appointment of a new prime minister. While they are in office, legal action may not be taken against Cabinet ministers without the consent of the prime minister. The Cabinet must resign en masse in the following circumstances:
When a motion of no confidence is adopted, or a vote of confidence defeated, by the House of Representatives, unless there is a dissolution of the house within ten days.
Upon the first convocation of the National Diet after a general election to the House of Representatives (even if the same prime minister is to be re-elected and appointed, and every other minister is to be reappointed).
When the position of prime minister becomes vacant, or the prime minister declares his intention to resign.
The Cabinet exercises two kinds of power. Some of its powers are nominally exercised by the Emperor with the binding "advice and approval" of the Cabinet. Other powers are explicitly vested in the Cabinet. Contrary to the practice in many constitutional monarchies, the Emperor is not even the nominal chief executive.