The Dragon Sword Saint of Konoha

Long before the Legendary Sannin etched their names into history, there existed a clan whose swordsmanship was said to rival the greatest shinobi of their era—the Kensei Clan. As one of Konohagakure's founding clans, they dedicated their lives to perfecting the way of the sword and protecting the village from the shadows. Yet after the First Shinobi World War, the clan vanished without a trace, remembered only as heroes who gave their lives for the Hidden Leaf. The truth behind their disappearance was buried deep within Konoha's darkest secrets. Ryuu Kensei, a man reincarnated from another world, is born as the last heir of the forgotten Kensei Clan. Hidden from those who once sought to erase his bloodline, he grows up unaware of the burden and legacy he carries. At the age of five, his unwavering dedication to the sword awakens the legendary Sword Heart, activating the mysterious Infinite Evolution System—a power that grants no shortcuts, but allows limitless growth through relentless training, experience, and understanding. Entering the Ninja Academy alongside Jiraiya, Tsunade, and Orochimaru, Ryuu begins walking a path unlike any other. While others pursue fame, power, and recognition, he devotes himself to mastering the sword, refining the Kensei Clan's ancient Five Element Sword Arts, and uncovering the forgotten history of his people. As war spreads across the shinobi world and hidden conspiracies begin to surface, Ryuu must decide what kind of swordsman he wishes to become. Will he seek vengeance for a fallen clan, or will he forge a new path and restore the honor of the Kensei name? This is the story of the last heir of the Kensei Clan. The story of a swordsman whose potential knows no end. The story of a legend that history tried to erase. — Description from novelcodex.org