Jokei was the grandson of FUJIWARA no Michinori (also known as Shinzei) and was a leading monk of the old style of Buddhism that opposed the new forms of Buddhism (such as Jodo (the Pure Land) Sect) that gained acceptance during the Kamakura period.
貞慶は藤原通憲（信西）の孫にあたり、鎌倉時代に台頭した新仏教（浄土教など）に対する旧仏教側の代表的な僧である。