Yumoto Kyūshin 湯本求真 (sinicized Tāngběn Qiúzhēn, original given name Shirō 四郎, 1876–1941) was the principal early-twentieth-century Japanese reviver of the kanpō 漢方 / kohō 古方 tradition and the author of the Kōkan igaku 皇漢醫學 (Chinese: Huáng Hàn yī xué, KR3ef059), a comprehensive three-volume defense and exposition of Shānghán / Jīnguì clinical doctrine that became the single most influential bridge between Edo-school Japanese kanpō and twentieth-century Chinese-medicine revivalism.
Native of Ishikawa prefecture, Yumoto was trained in Western medicine at the Kanazawa Medical Specialist School 金澤醫學專門學校 (graduated 1901) and practiced as a Western-medical doctor for a decade. After the death of his eldest daughter from dysentery in Meiji 43 (1910) — which he attributed to the failure of Western therapeutics — he turned to the kanpō tradition under the influence of his teacher Wada Keijūrō 和田啟十郎’s Igaku no tettsui 醫界鐵椎. He devoted the next two decades to a deep study of the ShānghánJīnguì corpus and the principal Edo kohō-school commentators (Yoshimasu Tōdō, Asada Sōhaku, etc.), publishing Kōkan igaku 皇漢醫學 in three volumes 1927–1928. The work was translated into Chinese by Zhōu Zǐxù 周子敘 in 1930 and became one of the most influential single texts in the twentieth-century Chinese-medicine revival movement.
Died at Tabata 田端 (Tokyo) in Shōwa 16 = 1941.