Records of heads of state
Officially, the current Emperor of Japan, Akihito is the 125th in line from the first emperor Jimmu, who is variously believed to have reigned in the 1st or 7th century BC. The earliest documentary evidence is only for the 29th emperor, Kinmei (AD 509–571); however, this is sufficient such that even the most conservative of estimates still places the Japanese imperial family as among the oldest lines in the world today.
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.