Emperor of Japan
The current Emperor on the throne is typically referred to as "Tennō Heika" (, "His (Imperial) Majesty the Emperor"), "Kinjō Heika" (, "His Current Majesty") or simply "Tennō", when speaking Japanese. The current Emperor will be renamed "Daijō Tennō" (, Retired Emperor), often shortened to "Jōkō" (), upon his planned retirement on 30 April 2019, and renamed "Heisei Tennō" () after his death and will then be referred to exclusively by that name in Japanese. In Japanese culture, it is considered a major faux pas to refer to a living Emperor by his posthumous name, although the posthumous name is the same as the era, which is used in official documents.
Cabinet of Japan
In practice, much of the Cabinet's authority is exercised by the Prime Minister. Under the Constitution, the Prime Minister exercises "control and supervision" over the executive branch, and no law or Cabinet order can take effect without the Prime Minister's countersignature (and the Emperor's promulgation). While Cabinet Ministers in most other parliamentary democracies theoretically have some freedom of action (within the limits of cabinet collective responsibility), the Japanese Cabinet is effectively an extension of the Prime Minister's authority.
The members of the current cabinet of Japan headed by the Liberal Democratic Party lawmaker Shinzō Abe as of 2 October 2018 are as follows: