The words written on the Honmon of Hokekyo, which was preached by Shaka, is a teaching which can save people in the period of Shobo (the phase lasting 1,000 years following the death of the Historical Buddha) through Zobo (the period of false law, lasting for 1,000 years after Shobo), since those people have received Geshu in their past lives, or are Hon-i Uzen (having qualification as Buddha).
釈迦仏の説いた法華経本門の経文上では、過去世に下種された本已有善（釈迦仏の機縁がある）の正法時代区分としての語義～像法の衆生を成仏せしめる脱益の教えである。