Kanroku introduced the book of astronomy/geography, Genka-reki (Genka calendar), and Tonko hojutsu as well as Matogakyo based on the principles of inyo gogyo, giving lectures to the 34 selected students including Shotoku taishi.
天文地理書・元嘉暦の暦・陰陽五行思想にもとづく遁甲方術・摩登伽経を伝え、聖徳太子をはじめ、選ばれた34名の弟子たちに講じた。