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.
Nakayama Tadayasu
Marquess Nakayama Tadayasu (Japanese 中山 忠能, 17 December 1809 – 12 June 1888) was a Japanese nobleman and courtier of the Edo period and then one of the Kazoku of the post-1867 Empire of Japan. He was the father of Nakayama Yoshiko (1834–1907), mother of the Emperor Meiji, who was born and brought up in Nakayama's household. He had the rare honour of being awarded the Order of the Chrysanthemum while still alive.