He ran away from the home town to went up to Kyoto, and he became an adopted son of Shodaibu (aristocracy official whose rank was lower than Kugyo) Tadayoshi FUJII to take over the family reign.
1735年（享保20年）郷里を出奔して上洛し、諸大夫藤井忠義の養子となり家督を継いだ。