This study provides an overview of the ideas of the Tagahōin-ryū 多賀法印流, a school of medicine that flourished from the late 16th to the early 17th century. The school was established by Shūyohōin 宗与法印, a monk who performed Buddhist rituals at a Shintō shrine named Taga Taisha 多賀大社; this was a common religious practice at the time due to the merging of Buddhism and Shintō. While the medical books of this school are influenced by Buddhist ideas in multiple ways, the influence of the Hongaku 本覚 doctrine and beliefs concerning the Lotus Sūtra is particularly strong. This study first lists works that are traditionally said to be the medical books of the Tagahōin-ryū. Subsequently, the two texts that are used in all the medical books of the school are introduced. These two texts describe the idea of the human body based on the Hongaku doctrine and the relation between medicine and beliefs concerning the Lotus Sūtra.
