Emperor Tenmu

Quick Facts: Who was Emperor Tenmu?

Subject:

Emperor Tenmu

Known for:

Fourth emperor of Japan; reigned 673–686, enacting major political reforms.

Born:

631

Died:

686-10-01

Century / Era:

631s Historical Era Archive

Verified Source:

2Day Chrono-Wiki & Primary Historical Archives

Origins & Early Life

Emperor Tenmu (also romanized Temmu, c. 630 – 686) was the 40th emperor of Japan according to the traditional order of succession. The son of Emperor Jomei and Empress Kōgyoku, he was born Prince Ōama around 630. Ruling from 673 to 686, during the Asuka period, his life is mainly documented by the chronicles Nihon Shoki and Kojiki, as well as the poetry collection Man'yōshū. Little is known of Ōama's early life. During the rule of his elder brother Tenji, Ōama was ambiguously favored as his successor, but was gradually bypassed in favor of Tenji's son Prince Ōtomo.

Career & Major Achievements

Tenji allegedly offered Ōama the throne during an illness in 671, but fearing a conspiracy against him, Ōama declined and left to serve as a monk at Yoshino Palace. The following year, Ōama received word that Ōtomo, now ruler, was planning to kill him. He fled Yoshino with a group of followers, beginning the Jinshin War. Along with a group of retainers and the governor of Ise Province, Ōama was able to block off the mountain passes to the northern and eastern provinces, where he raised an army against his nephew. Ōtomo was defeated and forced to commit suicide.

Enduring Legacy & Impact

Ōama took the throne and is posthumously known as Tenmu. Tenmu made a number of political reforms, modeling his government after the centralized state of Tang China. He was likely the first Japanese ruler to use the title of tennō ('emperor') and the first to be described as a divine being (kami) in his lifetime. He redistributed political titles among his family and political supporters and created four new ranks at the top of the kabane noble title system. He selected a site for a new capital around 683, on which (after his death) was likely built Fujiwara-kyō.

Chronological Milestones & Life Events

1. 631: Birth of Emperor Tenmu — Fourth emperor of Japan; reigned 673–686, enacting major political reforms.
2. 686 (0686-10-01): Passing & Historical Legacy — Emperor Tenmu passed away on 0686-10-01, leaving an enduring historical legacy.

Historical Fact-Check Quiz: Emperor Tenmu

True or False: “Emperor Tenmu was the first ruler to establish a capital at Fujiwara-kyō during his reign.”

Answer (FALSE ❌): While he selected the site around 683, it was likely built after his death.

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Frequently Asked Questions about Emperor Tenmu