We investigated original texts for yokukansan, a familiar Kampo formula, focusing on the classical literature
Xue-shi yi-an (薛氏医案) . Yokukansan was described in the
Bao-ying jin-jing-lu (保嬰金鏡録) written by Xue ji (薛己) in 1550, the
Xiao-er yao-zheng zhi-jue (小児薬証直訣) revised by Xue ji (薛己) in 1551,the
Bao-ying cuo-yao (保嬰撮要) by Xue kai (薛鎧) in 1556, and the
Xiao-er dou-zhen fang-lun (小児痘疹方論) in 1550. The phrase “one's own work” was used in “
Bao-ying jin-jing-lu (保嬰金鏡録)” and in the
Xiao-er dou-zhen fang-lun (小児痘疹方論) by Chen wen-zhong (陳文仲). However, there was no mention of “one's own work” in the same title, the
Xiao-er dou-zhen fang-lun (小児痘疹方論), as summarized by Xiong zong-li (熊宗立).
Yokukansan was found only in the
Xiao-er yao-zheng zhi-jue (小児薬証直訣) revised by Xue ji (薛己) in 1551, but not in the other copies of the same text. Therefore, it seems likely that yokukansan was created by Xue ji (薛己) himself.
Yokukansan was previously thought to have originated with the
Bao-ying cuo-yao (保嬰撮要). However, based on use of the phrase “one's own work” in the classical literature, it appears that the original text for yokukansan should be the
Bao-ying jin-jing-lu (保嬰金鏡録). Therefore, yokukansan seems to have been made by Xue ji (薛己), and not Xue kai (薛鎧), who was his father.
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