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.
Controversies regarding the role of the Emperor of Japan
In the Meiji Constitution of 1889, the emperor was sovereign and was the focus of the state's legitimacy. The preamble stated, "The rights of sovereignty of the State, We have inherited from Our Ancestors, and We shall bequeath them to Our descendants." In the postwar constitution, the emperor's role in the political system was drastically redefined. A prior and important step in this process was Emperor Hirohito's 1946 New Year's speech, made at the prompting of General Douglas MacArthur, renouncing his status as a divine ruler, without however repudiating that he was a descendant of Amaterasu as arahitogami. Hirohito declared that relations between the ruler and his people cannot be based on "the false conception that the emperor is divinity in human form ("akitsumikami") or that the Japanese people are superior to other races."