Yamahisa is Ryu Shizuka's editor. He works with him to get Ryu's manga more Weekly Shōnen Jump friendly. He is also been Yuriko Aoki's editor.
Appearance
Personality
Bakuman
Trivia
He bears a resemblance to a minor character called Kadowaki from Hikaru no Go, another series drawn by Takeshi Obata. Kadowaki is a character who thinks about entering the pro exam in Go until he is beaten by Fujiwara no Sai.
