"Kengan Ashura" is a Japanese manga series written by Yabako Sandrovich. It revolves around underground fighting tournaments where businesses hire fighters to represent them in brutal matches. The story follows Ohma Tokita, a skilled fighter who enters these tournaments to prove his strength and uncover his past. The series features intense martial arts battles and a diverse cast of characters, each with unique fighting styles and backgrounds. It explores themes of power, loyalty, and the consequences of violence, making it popular among fans of action and sports genres. The manga has also been adapted into an anime series, further expanding its audience.