Insei, Hikaru no Go Wiki

A go apprentice (院生, Insei) is a student learning to play Go at an institution, typically with the aim of becoming a professional player. In Japan, such a student is called an insei (literally, "institution student"). Institutions for insei include the Nihon Ki-in (Japanese Go Association) and the Kansai Ki-in (Kansai Go Association). The equivalent of Go insei in Korea is "Yeon'gusaeng" (Hangul: 연구생; Hanja: 硏究生), read "kenkyūsei" in Japanese and "yán jiū shēng" (also meaning "graduate student")

Hikaru no Go (Volume) - Comic Vine

Volume 9, Hikaru no Go Wiki

Hikaru no Go Review - Fextralife

Volume 14, Hikaru no Go Wiki

Hikaru no Go (TV Series 2001–2003) - Episode list - IMDb

Animini: Hikaru No Go -Episode 22 – The Insei Test – Pinkie's Paradise

Yuta Fukui, Hikaru no Go Wiki

Hikaru no Go Insei shiken (TV Episode 2002) - IMDb

Shinichiro Isumi

Yoshitaka Waya, Wiki

Volume 8, Hikaru no Go Wiki

Hikaru no Go (2001)