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.
Imperial House of Japan
There are currently 18 members of the Imperial Family:
The Princess Mikasa is the widow of the Prince Mikasa (2 December 1915 – 27 October 2016), the fourth son of Emperor Taishō and Empress Teimei and an uncle of Emperor Akihito. The Princess was born on 4 June 1923, the second daughter of Viscount Masanori Takagi. Princess Mikasa has two daughters and three sons with the late Prince Mikasa.