Unbreakable Machine-Doll is a Japanese light novel series written by Reiji Kaitō and illustrated by Ruroo. Media Factory has published seventeen volumes under their MF Bunko J imprint from November 2009 to July 2017. A manga adaptation by Hakaru Takagi began serialization in Media Factory's Monthly Comic Alive magazine in 2010. A 12-episode anime television series adaptation aired in Japan between October 7 and December 23, 2013 and is licensed by Crunchyroll outside of Japan.

Yui Ogura is a Japanese voice actress and singer from Gunma Prefecture.