Iwai

Iwai's Ichinoseki district was the birthplace of Ōtsuki Gentaku, an important scholar of Dutch learning. Born at Nakazato in 1757 as the son of a domain physician, he studied under Takebe Seian before pursuing Western medicine and the Dutch language. His later career connected this northern district with the scholarly world of Edo.

Gentaku opened the Shirandō school and published Rangaku Kaitei, an introduction to Dutch learning, in 1788. His revised anatomical work, Chōtei Kaitai Shinsho, appeared in 1826, reworking the translation associated with his teacher Sugita Genpaku. Records of his discussions with the Dutch trading-post chief in Edo that same year include handwritten notes by Siebold. Through physicians, books and correspondence, the Iwai countryside participated in the circulation of knowledge that reached Japan through its restricted overseas contacts.