Prince Tomohito of Mikasa (寛仁親王, Tomohito Shinnō; 5 January 1946 – 6 June 2012) was a member of the Imperial House of Japan and the eldest son of Takahito, Prince Mikasa and Yuriko, Princess Mikasa. He was a first cousin of Emperor Akihito, and was formerly sixth in the line of succession to the Japanese throne and the heir apparent to the princely house of Mikasa-no-miya and the title "Prince Mikasa". Prince Tomohito was the first member of the Imperial House of Japan with a full beard since Emperor Meiji, thus earning him the popular nickname of the "Bearded Prince" (ヒゲの殿下 Hige no Denka). He died of cancer on 6 June 2012, aged 66.
Source: “Prince Tomohito of Mikasa”, English Wikipedia (CC BY-SA 4.0), excerpt