Tenji

Who They Were

Emperor Tenji (天智天皇, てんじ てんのう, Tenji Tennō) was the thirty-eighth emperor of Japan in the traditional order of succession. He lived from 626 to 672, dying on 7 January 672, and his reign belongs to the Asuka period (538–710), the era when Japan's first centralised state took shape around the Yamato court. He was the son of Emperor Jomei and Empress Kōgyoku, and his mother later ruled a second time under the name Empress Saimei.

Before he took the throne he was known first as Prince Kazuraki and later as Prince Naka no Ōe. His career was unusual in that he held power for years before he formally became emperor. He was a politician and a waka poet, and he appears in the historical record as the driving force behind two of the most consequential events of the seventh century: the Isshi Incident and the Taika Reform.

Life and Career

Tenji's father, Emperor Jomei, died in 641. A succession dispute followed between the young Prince Naka and another royal prince, Yamashiro, and it was resolved by the accession of Naka's mother to the throne. In 645, Naka conspired with a group of aristocrats to assassinate the minister Soga no Iruka, an act remembered as the Isshi Incident. After the killing, his mother stepped down, and Naka served as crown prince to his uncle, Emperor Kōtoku.

Kōtoku died in 654, and Kōgyoku returned to the throne as Empress Saimei. She died in 661, while preparations were under way for an expedition to Korea, where the forces of Tang China and Silla defeated those of Japan. Naka did not take the throne at once. He governed as regent for the next seven years.

As regent he reorganised the court and strengthened military infrastructure in Kyushu against the possibility of a Chinese invasion. He then moved the royal capital to the Ōmi Ōtsu Palace, northeast of Asuka, and ascended the throne as emperor. He established the Daijō-kan (太政官, だいじょうかん), the Council of State, naming his son Prince Ōtomo as its first Daijō-daijin (太政大臣, だいじょうだいじん), the office usually translated as prime minister. He is also credited with ordering the compilation of the first version of the Ritsuryō (律令, りつりょう) law code, the Chinese-style legal system that underpinned the Japanese state for centuries.

Tenji fell ill and died in 671. His death triggered a succession dispute between Prince Ōtomo and Tenji's brother, Prince Ōama. The quarrel became a short civil war, which Ōama won; he then ruled as Emperor Tenmu. Tenji received no memorial under Tenmu, but was given a burial tumulus in 700, during the reign of his daughter Empress Jitō.

Why They Matter

Tenji stands at the point where Japan stops being a loose coalition of clans and starts being a governed state. The Taika Reform, which followed the Isshi Incident, restructured landholding, taxation and court rank along continental lines. The Daijō-kan he created became the administrative spine of the imperial government. The Ritsuryō code attributed to his order supplied the legal framework that later codes completed.

His decision to move the capital to Ōmi Ōtsu was a statement of intent: a new court, physically removed from the old power base at Asuka. His reign there was remembered as a golden age of art and culture, though later chroniclers probably overstated its brilliance.

The succession crisis after his death shaped the next generation of the imperial line. Ōama's victory made him Emperor Tenmu, and Tenmu's descendants, not Ōtomo's, dominated the throne. Tenji's own daughters nevertheless reached the highest position: both Jitō and Genmei became empresses, and Jitō was the one who finally gave her father a proper tomb.

The Name in Japanese

The Japanese name is 天智天皇. It is read てんじ てんのう in kana, and romanised as Tenji Tennō. Note that the first element is pronounced tenji, not tenchi, even though the same kanji combination is often read tenchi elsewhere.

Breaking it down character by character:

• 天 — read てん (ten) in this name. It means "heaven" or "sky". It is the same character used in 天皇 (tennō, emperor), where it carries the sense of the heavenly sovereign.
• 智 — read じ (ji) here. It means "wisdom", "intellect" or "knowledge". In isolation the character is more commonly read chi, as in 知恵 (chie, wisdom); the voiced ji reading appears in this name.
• 天 — read てん (ten) again, "heaven".
• 皇 — read のう (nō) here, from an older reading. It means "emperor" or "sovereign". The modern everyday reading of this character is kō, as in 皇居 (kōkyo, the imperial palace), but in 天皇 the final character is voiced to nō.

So the four characters together mean, roughly, "Heavenly-Wisdom Emperor". Japanese imperial names of this type are posthumous: they were assigned after death, and the two-character epithet is chosen to suit the ruler rather than used during his lifetime. A reader meeting 天智天皇 in a text should expect the reading てんじ てんのう and the romanisation Tenji Tennō.

Legacy

The 8th-century chronicle Nihon Shoki gives Tenji's own reign relatively little space, though it stresses how important he was during the reigns of his predecessors. He was honoured in verse in the 8th-century anthologies Man'yōshū and Kaifūsō, including a cycle of nine banka (挽歌, ばんか), elegies composed on his death.

His most durable legacy is institutional. The council of state, the law code and the reformed court outlived him and outlived the men who fought over his succession. The Ōmi court he built was remembered as a cultural high point, and the poets who wrote for him fixed his name in the earliest surviving Japanese literary collections.