Inoue Gen'an Inseki

井上幻庵因碩 (1798-1859) Head of the Inoue house (1824-1846), proposed a changed numbering that made him the eleventh head (rather than tenth), by including Doseki at the head of the list. At various times known as Hattori Rittetsu, Inoue Ansetsu, Intetsu, Gen(n)an Inseki, Inoue Genan Inseki.

He is considered to be one of the Four Sages

Honinbo Jowa was his great rival for the post of Meijin-Godokoro. Jowa was successful in 1831, but only as a result of behind-the-scenes intrigues, and Gen'an Inseki never attained the post. Later, his application for Meijin was challenged & rebuffed by Honinbo Shuwa in a two game match. These events led to future animosity from the Inoue house against the Honinbo house.

Author of several go books including Igo Shukairoku and Igo Myoden.

He was inducted to Nihon Ki-in Hall of Fame in 2016.