Ninja Royale ~Ji o Koeta Saikyou no Ninja~

Ninjas are superhuman beings who have honed their special combat abilities called ninjutsu (ninja skills) and operated in the shadows of history. Gokou, the strongest ninja of the Sengoku period, is reincarnated in modern times after 500 years and savors the peace of the world… but evil ninjas lurk in the shadows of modern society as well! Fierce warriors, masters, and heroes attack one after another! The strongest fighters clash like the wind, sparks flying! The ultimate unrivaled power battle action! Original Webtoon