Shugendo (Japanese mountain asceticism-shamanism incorporating Shinto and Buddhist concepts) in Tozan School, which Shobo was founded, is thought to demonstrate profound preaching by Dainichi Nyorai with Funi Ichijo (most important of the Shingon principles which states to climb the mountain of Ichijo (truth), Mt. Omine, and pray for obtaining the body of funi (a thought that Ri (the innate reason) and Chi (knowledge) are non-two)), which was expressed through "Shugen Ein So Mandala" (literally, mandala of Shugendo under the teaching of Ein (Dainichi Nyorai's most secret teachings)).
聖宝を祖とする当山派修験道においては、一方で『修験恵印総漫拏羅』を通じて表現された不二一乗の世界観をもって大日如来による秘奥の説法を示すものとする。