Fujiwara no Fuhito in the context of "Emperor Shōmu"

The Tachibana clan (橘氏, Tachibana-uji, Tachibana-shi) was one of the four most powerful court nobility (kizoku or kuge) families in Japan's Nara and early Heian periods—the other three were the Minamoto, the Fujiwara, and the Taira. Members of the Tachibana family often held high court posts within the Daijō-kan (Ministry of State), most frequently Sadaijin (Minister of the Left). Like the other major families at court, they also constantly sought to increase and secure their power by marrying into the imperial family. However, as the Minamoto clan and the Fujiwara clan gained power over the course of the 9th and 10th centuries, the Tachibana were eclipsed and eventually became scattered across the country. Though serving in high government posts outside the capital, they were thus denied the degree of power and influence within the court at Kyoto (Heian-kyō) which they once enjoyed.

The name of Tachibana was bestowed on Agata-no-Inukai no Michiyo by Empress Genmei in 708. She was the wife of Prince Minu, a descendant of Emperor Bidatsu and mothered Princes Katsuragi and Sai. She later married Fujiwara no Fuhito and bore Kōmyōshi (Empress Kōmyō). In 736, Princes Katsuragi and Sai were given the surname Tachibana, renouncing their imperial family membership. They became Tachibana no Moroe and Tachibana no Sai respectively.

The Taihō Code or Code of Taihō (大宝律令, Taihō-ritsuryō) was an administrative reorganisation enacted in 703 in Japan, at the end of the Asuka period. It was historically one of the Ritsuryō-sei (律令制, ritsuryō-sei). It was compiled at the direction of Prince Osakabe, Fujiwara no Fuhito and Awata no Mahito. The work was begun at the request of Emperor Monmu and, like many other developments in the country at the time, it was largely an adaptation of the governmental system of China's Tang dynasty.

The establishment of the Taihō Code was one of the first events to include Confucianism as a significant element in the Japanese code of ethics and government. The Code was revised during the Nara period to accommodate certain Japanese traditions and practical necessities of administration. The revised edition was named the Yōrō Code (養老律令, Yōrō-ritsuryō). Major work on the Yōrō Code was completed in 718.