buddha-body within a practitioner
In esoteric Buddhism (Shingon), the practitioner's body that is empowered through ritual and meditation to manifest the buddha's qualities.
Kajishin refers to the state in which the practitioner's body is empowered by the buddha's power.
altruistic manifested form of Mahavairocana
In New Shingon doctrine, the compassionate, manifested body of Mahavairocana that appears to save beings; contrasted with 本地身 (honjishin), the fundamental, unmanifested form.
See also: 本地身
In New Shingon, Kajishin is considered the form of Mahavairocana that appears for the benefit of others.