He is known for his martial arts series Grappler Baki (1991–1999) and its four sequels, which have sold over 100 million volumes.
Prior to becoming a manga artist, he served five years in the 1st Airborne Brigade of the Japan Ground Self-Defense Force.
[2] During his service he practiced amateur boxing, and has competed in the National Sports Festival.
He also holds a degree in Shorinji Kempo, which he has practiced since he was a teenager.
He is the father of Paru Itagaki, Beastars manga author.