Keisuke Itagaki is a Japanese manga artist. He is best known for his martial arts series [Grappler Baki](https://anilist.co/manga/41425/Grappler-Baki/) (1991–1999) and its five sequels, which have sold over 100 million volumes. In 1996, he began working on [Garouden](https://anilist.co/manga/37921/Garouden/), an original work by [Baku Yumemakura](https://anilist.co/staff/97026/Baku-Yumemakura). He has also collaborated on the series [Garouden Boy](https://anilist.co/manga/45998/Garouden-Boy/).

Prior to becoming a manga artist, he served 5 years in the 1st Airborne Brigade of the Japan Ground Self-Defense Force. 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 the famous mangaka [Paru Itagaki](https://anilist.co/staff/121564/).