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 Emperors of Japan
This list of Emperors of Japan presents the traditional order of succession. Records of the reigns of the Emperors of Japan are compiled according to the traditional Japanese calendar. In the "nengō" system which has been in use since the late-seventh century, years are numbered using the Japanese era name and the number of years which have taken place since that "nengō" era started.