Reincarnated as a Sword, also known as I Became the Sword by Transmigrating (Japanese: 転生したら剣でした, Hepburn: Tensei Shitara Ken Deshita) or Tenken (転剣), is a Japanese light novel series written by Yuu Tanaka and illustrated by Llo. It started as a web novel on the Shōsetsuka ni Narō website in October 2015. It was later published as a light novel by Micro Magazine, who released the first volume in July 2016. The series has received a manga adaptation by Tomowo Maruyama, published by Gentosha, as well as a spin-off manga by Hinako Inoue, published by Micro Magazine. Both the light novels and manga were licensed for North American release by Seven Seas Entertainment, as well as the spin-off. An anime television series adaptation by C2C premiered in October 2022.