The Shakyamuni Buddha who appeared in this corrupt world is regarded as Ojin Buddha and the Amida Buddha of the Jodo (Pure Land) Sect is regarded as having changed himself from hojin in the Saiho Gokuraku Jodo (The West Pure Land (of Amida Buddha)) to hosshin (Dharma Body) to come to this corrupt world to welcome living things.
娑婆世界に出世した釈迦仏は応身の仏とされ、浄土教の阿弥陀仏は、西方極楽浄土の法身から変えてこの娑婆世界に報身として衆生を迎えにきたとされる。