Reincarnated as a Sword, also known as I Became the Sword by Transmigrating (転生したら剣でした Tensei Shitara Ken deshita), also known as 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. The novels were later licensed 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.