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.
List of Prime Ministers of Japan
This is a list of Prime Ministers of Japan, including those of the Empire of Japan, from when the first Japanese prime minister (in the modern sense), Itō Hirobumi, took office in 1885, until the present day. The office is currently held by Shinzō Abe. Those Prime Ministers under the Meiji Constitution had a mandate from the Emperor. The "electoral mandates" shown are for the lower house of the Imperial Diet that was not constitutionally guaranteed to have any influence on the appointment of the Prime Minister.