Kengan Omega (Japanese: ケンガンオメガ, Kengan Omega) is a Japanese manga series written by Sandrovich Yabako and illustrated by Daromeon and the sequel to Kengan Ashura.

Beginning two years after the game-changing Kengan Annihilation Tournament on Ganryu Island, a young man named Narushima Kouga aims to enter the Kengan matches, seeking Tokita Ouma for a yet unknown reason. He begins to work under Yamashita Kazuo when he meets Gaou Ryuuki, a splitting image of Ouma. As a massive showdown between the Kengan Association and Purgatory, another underground martial-arts fighting organization looms in the background.

Two years after the events of Kengan Ashura, a young man named Narushima Koga aims to enter the Kengan matches, while also seeking out Tokita Ohma for a mysterious reason. He begins to work under Yamashita Kazuo when he meets Gaoh Ryuki, the spitting image of Ohma. Now with a massive showdown between the Kengan Association and Purgatory, another underground martial-arts fighting organization, looming in the background, how will Kouga become strong enough to take part in the legendary Kengan fights?