Taking advantage of his family background that his father Norimori was a younger brother of TAIRA no Kiyomori, he succeeded in life by being appointed as a court official despite his young age amid the golden age of the Taira clan government.
父の教盛は平清盛の弟であり、業盛も平氏政権の全盛の中で若くして任官し栄達した。