Shigeo Morishita

Also known as Morishita Sensei or Mr. Morishita. A 9-dan pro who is Waya's go teacher and leader of the study group which Hikaru also frequents on Waya's invitation. He considers Toya Meijin a rival, since the two of them became pros at the same time. Morishita also mentors Michio Shirakawa (7-dan), the community Go leader.

(Source: Wikipedia)