Tachibana was originally an official attached to the Imperial Court. In 740, Naramaro was conferred the rank of ju go-i no ge and then promoted to ju go-i no jō.
In 741 he was promoted to Daigaku-no-kami, in 743 to shō go-i no jō, in 745 to director of the Settsu office, in 746 to Senior Assistant Minister of Popular Affairs, and in 747 to ju shi-i no ge.
In 749, Emperor Shōmu retired, and Empress Kōken assumed the throne. Fujiwara no Nakamaro, who had both the favor of Kōken and the confidence of Shōmu's wife Empress Kōmyō, rapidly rose to power, and came into conflict with Moroe. In the same year, Naramaro rose to ju shi-i no jō, and was appointed as chamberlain and Sangi.
When Nakamaro Fujiwara began wielding power, Tachibana conspired with Kifumi-o, Funado-no-o, Komaro otomo and others to assassinate him and dethrone Emperor Shomu. The plot, however, was discovered and he was thrown into prison after which nothing became known of him.