Masakazu Yamahisa
Birthdate: 1987 Apr 11
Age: 31
Gender: Male
Masakazu Yamahisa is Ryu Shizuka and later, Ko Aoki's editor. He works with Ryo to get mis manga more Weekly Shōnen Jump friendly and offers Aoki to work on a manga with romance in it suitable for the magazine. (Source: Bakuman Wikia)
