Inoue Dosetsu Inseki
井上道節因碩 (1646-1719) Third head of the Inoue house, (1692 - 1719), or the fourth if counting Nakamura Doseki. He became Meijin Godokoro in 1710. He is also famous for composing the Igo Hatsuyoron, an extremely hard tsumego collection (even for professionals) used to train his students. He also composed an easier collection called Yoshin Teiki, most of which is now lost.
His pupils included Aihara Kaseki.
After Dosaku's death, Dosetsu took care of young Dochi.
 See Gennan Inseki: he changed the numbering officially used by the Insekis.