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.
Christianity in Japan
It is estimated that the Japanese Orthodox Church has some 30,000 adherents today. The current primate of Japan is Daniel Nushiro, Metropolitan of all Japan and Archbishop of Tokyo, who was elevated to the primacy in 2000. The primate's seat is the Holy Resurrection Cathedral in Chiyoda, Tokyo. Founded in 1891, the cathedral has been known as Nikolai-do in honor of its founder Nicholas Kasatkin, now venerated as St. Nicholas of Japan. The cathedral serves as the seat of the national primate of Japan and continues to be the main center of Orthodox Christian worship in Japan.