Clockwork Planet is a Japanese light novel series, written by Yuu Kamiya and Tsubaki Himana, and illustrated by Shino. Kodansha has published four volumes since April 2, 2013 under their Kodansha Ranobe Bunko imprint. The story is set in a clockpunk fantasy version of the world, in which the entire planet is run by clockwork. The main characters are five people (a machine otaku, two automata, a young technician and a bodyguard) who, after a month of meeting, become the world’s most infamous terrorists.
A manga adaptation illustrated by Kuro was serialized in Kodansha’s shōnen manga magazine Monthly Shōnen Sirius since 2013 and ended in August 2018. It has been collected in ten tankōbon volumes. An anime television series adaptation by Xebec aired from April 6 to June 22, 2017.
The first light novel volume was published on April 2, 2013 by Kodansha under their Kodansha Ranobe Bunko imprint. As of December 29, 2015, four volumes have been published. North American online light novel publisher J-Novel Club have licensed the light novel. Seven Seas Entertainment has licensed the Light Novels in North America for print.
At an unspecified point in time, Earth collapses. Despite it being almost inevitable that humankind would definitely die out, a genius engineer known only as “Y” manages to rebuild Earth entirely with gears and clockwork mechanisms, renaming it “Clockwork Planet”. 1,000 years later, original cities of Earth’s countries are flourishing inside the planet’s surface gears. Naoto Miura, a high school student living in Grid: Kyoto who is in love with mechanics, is dragged into a world crisis when a mechanical crate crashes into his apartment. There, he meets RyuZU, a broken automaton who is part of the Initial-Y Series, a series of automaton created personally by Y himself. Using his superior sense of hearing, Naoto fixes her in three hours despite RyuZU having been broken for 206 years as nobody was able to revive her. Promising loyalty to him, the two are eventually found out by Dr. Marie Bell Breguet, a princess of a noble family and the youngest person to become a master engineer in an international separate government organization “Meister Guild”, and her automaton bodyguard Vainney Halter. With the faulty Core Tower, a central tower in every Grid city that controls its gear functions, Naoto pinpoints the problem with his sense of hearing alone in ten minutes, fixing it along with other engineers of the Meister Guild and thwarting the government’s attempts to purge the city and destroy lives. As the government’s illegal technological experimentation is still at large, the pairs join forces to carry out justice and prevent further purges. A month after their encounter, all four appear in Akihabara, Tokyo, having become the world’s most infamous terrorists in their quest.