抄録
Fangji (boi in Japanese) is one of the main crude drugs that has been used in China and Japan. The crude drug name and original plant of the medicine is different in each country. We previously elucidated that boi is correct notation for this medicine; however the reason the original plant has been confused is not clear. In this paper, we investigated ancient medical literature and elucidated historical changes of the original plants of kanboi and mokuboi. As a result, in China, we found that the root of Sinomenium acutum was used as kanboi from the Later-Han to Yuan dynasty, and the origin was changed to the root of Cocculus orbiculatus after the Ming dynasty. On the otherhand, the root of Cocculus orbiculatus was used as mokuboi after the Later-Han dynasty, and then the medicine was changed to the ground part of the same plant after the Tang dynasty. Meanwhile, in Japan, we also found that Cocculus orbiculatus was used as boi in the Heian era. In addition, we found that Sinomenium acutum and Cocculus orbiculatus were used as kanboi and mokuboi, respectively, in the Edo era.
