He also became interested in an unworldly man from Mt. Iwama called Sojo (meaning "highest-ranking monk") Sugiyama, who had enlightened Torakichi from the other world, and grew to believe in such a mysterious existence; having become fascinated with the Gengaku of Taoism, he then formed a new theory of Shinsendo by fusing Japanese Kodo and Chinese Gengaku and began inducting his students into the theory as some kind of esoteric ceremony.
やがて寅吉少年を幽冥から啓導されている、岩間山の山人・杉山僧正なる異人に興味を抱き信仰を重ねていく間に、道家の玄学思想に魅せられて、我が国に伝来する古道の思想と道家玄学の思想を折衷した神仙道の教義をうち立て、弟子達にこの秘教密儀的な秘儀を伝授することとなる。