Government of Japan
The Current Emperor of Japan (今上天皇) is Akihito. He was officially enthroned on November 12, 1990. He is styled as "His Imperial Majesty" (天皇陛下), and his reign bears the era name of Heisei (平成). Naruhito, the Crown Prince of Japan, is the heir apparent to the Chrysanthemum Throne.
Emperor
Currently, many believe the new prince of Japan will ascend the throne, as the law defines. Historically, Japan has had eight reigning empresses who used the genderless title "Tennō", rather than the female consort title "kōgō" (皇后) or "chūgū" (中宮). There is ongoing discussion of the Japanese Imperial succession controversy.