The Taira clan's fortune steadily grew thanks to their management of the provinces in which they were enfiefed and to Japan's trade with Song China, until there were over 10 Taira family members among Kugyo (the top court officials), as well as more than 30 tenjobito (a high-ranking courtier allowed into the Imperial Palace).
平氏一門は知行国支配と日宋貿易で財を増し、10数名の公卿、殿上人30数名を占めるに至る。