Emperor of Japan
Currently, the Emperor of Japan is the only head of state in the world with the English title of "Emperor". The Imperial House of Japan is the oldest continuing monarchical house in the world. The historical origins of the Emperors lie in the late Kofun period of the 3rd–7th centuries AD, but according to the traditional account of the "Kojiki" (finished 712) and "Nihon Shoki" (finished 720), Japan was founded in 660 BC by Emperor Jimmu, who was said to be a direct descendant of the sun-goddess Amaterasu. The current Emperor is Akihito. He acceded to the Chrysanthemum Throne upon the death of his father, Emperor Shōwa (Hirohito), in 1989. The Japanese government announced in December 2017 that Akihito will abdicate on 30 April 2019.
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: