En no Ozunu is the founder of Shugendou which teaches how to gain mystic powers through ascetic practices in the mountains and, by unifying with nature, to reach Sokushin Joubutsu, attaining enlightenment in one’s present form. As the initiator who first organized the Japanese spiritual doctrine, En no Ozunu has stood out with his enormous influence that still continues today.    
He was born in 634 at the foot of Katsuragi Mountain in present day Gose City, Nara Prefecture. He possessed unique talents since childhood teaching himself to carve Buddha statues and learning how to write Sanskrit characters. At the age of seventeen, he left his family home and began spiritual practice in Katsuragi Mountain.
Legend says he spent time with a sennin, a legendary immortal hermit, even chastising Buddha and deities, and became a man of strength who had a demon as his follower. When his supernatural powers became known to the Imperial Court, the Emperor, frightened by his power, ordered him exiled to Izu Ooshima Island.
In his late life, he traveled throughout Japan and visited a number of sacred mountains. Reportedly most of mountains considered sacred mountains today were founded by him. At the age of sixty seven, he passed away while smiling, surrounded by many disciples in Tenjyouga-dake Mountain.