Dainichi Kinrin, which is believed to be a deity derived from the great cosmic Buddha (Dainichi Nyorai in Japanese), is associated with the Sanskrit syllable "bhruuM," which Dainichi Nyorai of the transcendental world uttered while he was absorbed in profound meditation in the world of physical phenomenon.
大日金輪は、大日如来所変の仏頂尊とされ、金剛界大日如来が胎蔵界日輪三昧という瞑想の境地に入って唱えた「ボロン」の神格化とされる。