Ishinpō

thumb|250px|The 22nd volume of the Ishinpō, which has the only illustration in the full text.

is the oldest surviving Japanese medical text. It was completed in 984 by Tamba Yasuyori (also referred in some sources as Tanba no Yasuyori) and is 30 volumes in length. The work is partly based on a Chinese medical work called Zhubing yuanhou lun (諸病源候論 General Treatise on Causes and Manifestations of All Diseases), compiled by Sui dynasty writer Chao Yuanfang. Many of the texts cited in Ishinpō have been lost in China, and have only survived to the present through their inclusion in the work. It is a national treasure of Japan.