Prince Mikasa of Japan, uncle of the current Emperor Akihito, brother of Emperor Hirohito and son of Emperor Taishō, died of cardiac arrest on October 27, 2016 in a hospital in Tokyo, Japan at the age of 100. His death leaves only four people in the Japanese line of succession.
The current order of succession is:
1. HIH Prince Naruhito, Crown Prince of Japan (1960) – eldest son of HIM Emperor Akihito
2. HIH Prince Akishino (Fumihito) (1965) – second son of HIM Emperor Akihito
3. HIH Prince Hisahito of Akishino (2006) – son of Prince Akishino
4. HIH Prince Hitachi (Masahito) (1935) – younger brother of HIM Emperor Akihito
Learn more about the Japanese Imperial Family: Unofficial Royalty – Japanese Imperial Family