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")

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