Kaibara Ekiken 貝原益軒 (Chinese: Bèiyuán Yìxuān, 1630–1714), early-Edo Japanese Neo-Confucian scholar, naturalist, and pharmacognosist. Author of the Yamato honzō 大和本草 (1709), an Edo-period Japanese pharmacopoeia that systematically catalogued the Japanese flora, fauna, and minerals while remaining engaged with the Chinese Gāngmù tradition. The work is one of the founding documents of Edo honzōgaku 本草学 and stands alongside 稻生宣義 Inō Jakusui’s Shobutsu ruisan 庶物類纂 as the principal early-Edo systematic natural-history pharmacology. Japanese scholar; not in CBDB.