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") in Chinese.
What is require to become an insei is that the person must be at least strong to become one and the average player can not past the test easily another thing is if a person want to become insei they had to quit their go club if they are part of one since insei are not allow to play in amateur tournament
List of Insei
During the series, many of known Insei became Professionals, such as Hikaru.
|Hikaru Shindou||2 (former); 1 (former)|
|Yoshitaka Waya||1 (former)|
|Shinichirou Isumi||1 (former)|
|Kousuke Ochi||1 (former)|
|Toshinori Honda||1 (former)|
|Ryou Ijima||1 (former)|
|Mitsuru Mashiba||1 (former)|
|Suyong Hong||1 (former)|
|Le Ping||1 (former)|