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.
Emperor Kōgen
, also known as "Ooyamatonekohikokunikuru no Mikoto (大倭根子日子国玖琉命)", was the eighth emperor of Japan, according to the traditional order of succession.