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 of Japan
The role of the Emperor of Japan has historically alternated between a largely ceremonial symbolic role and that of an actual imperial ruler. Since the establishment of the first shogunate in 1199, the Emperors of Japan have rarely taken on a role as supreme battlefield commander, unlike many Western monarchs. Japanese Emperors have nearly always been controlled by external political forces, to varying degrees. In fact, between 1192 and 1867, the "shōguns", or their "shikken" regents in Kamakura (1203–1333), were the "de facto" rulers of Japan, although they were nominally appointed by the Emperor. After the Meiji Restoration in 1867, the Emperor was the embodiment of all sovereign power in the realm, as enshrined in the Meiji Constitution of 1889. Since the enactment of the 1947 Constitution, he has been a ceremonial head of state without even nominal political powers.