Tensei shitara Ken deshita, also known as Reincarnated as a Sword, is a Japanese light novel series written by Yuu Tanaka and illustrated by Llo. It follows the story of a man who is reincarnated as a powerful sword in a fantasy world and partners with a young catgirl adventurer named Fran. Together, they embark on quests and face various challenges, growing stronger with each encounter. The series combines elements of isekai, action, and fantasy, creating an engaging narrative.