Goku was the strongest ninja of the Sengoku period, a legendary warrior who served Oda Nobunaga himself. After failing to protect his lord from a mysterious assassin, he took his own life in disgrace. Five centuries later, he reincarnates as a modern high school student, a world where ninjas now live quietly integrated into society. When he crosses paths with these modern warriors and discovers evil ninjas lurking in the shadows, Goku is pulled back into a conflict that spans lifetimes.

What sets this battle action manga apart is the talent behind it. The story is by Kohei Kato, known for the gritty action thriller Demon City, with storyboard work by Naka Daifuku (YLAB) and stylish illustrations by SYNAPSE HEART. The result is a series that moves fast, hitting both the historical flashbacks and modern-day fights with solid pacing. If you like reincarnation stories where a legendary warrior has to relearn the modern world while dealing with old enemies, this one delivers cleanly.

Also known as: ニンジャロワイアル～時を超えた最強の忍者～, Ninja Royale: The Strongest Ninja Across Time, Ninja Royale: The Mightiest Ninja Across Time.

action, battle, shonen, reincarnation, ninja, modern setting, time slip, martial arts, seinen, line manga original