Heavy Object v01 cover

Heavy Object Volume 1

HEAVY OBJECT (ヘヴィーオブジェクト, Hevī Obujekuto) is a science fiction light novel series, written by Kamachi Kazuma, author of the Toaru Majutsu no Index series, with illustrations by Nagiryo. It is published by ASCII Media Works under the Dengeki Bunko light novel imprint. An anime adaptation by J.C.Staff began airing in October 2015.[1]


See also: Setting

In the world of Heavy Object, the United Nations has collapsed, leaving the world divided between four powers - the Legitimacy Kingdom, the Information Alliance, the Capitalist Corporations and the Faith Organization. Following the development of Objects, armored fighting machines possessing vastly superior capabilities to conventional units and weapons, war has developed into a bloodless game determined by battles between Objects.

In a military base located on the frigid regions of Alaska, a mechanic-in-training named Quenser learns the ropes of becoming an expert in the field of Objects, and meets one of its elite pilots named Milinda. As their friendship develops, Quenser discovers that the real face of war is merely hiding behind the mask of bloodless defeat and victory...


See also: Terminology

Clean War: A concept applied to warfare that has developed from the development of Objects, with wars being determined entirely by arranged battles between Objects, with no blood shed.

Objects: Gigantic armored fighting machines with vastly superior capabilities to conventional units and weapons, completely changing the way wars are fought.

Elites: Pilots specifically trained and calibrated to pilot a specific Object.


Light NovelsEdit

As of October 2015, ten volumes of the Heavy Object light novel series have been published. The tenth volume was released as Dengeki Bunko's 3000th title.[2]

# Image Title Release Date ISBN
Heavy Object v01 cover
Heavy Object (ヘヴィーオブジェクト, Hevī Obujekuto) October 10, 2009 [3] ISBN 978-4-04-868069-1
Heavy Object v02
Heavy Object: An Audition War (ヘヴィーオブジェクト 採用戦争, Hevī Obujekuto Saiyō Sensō, lit. "Adoption War") June 10, 2010 [4] ISBN 978-4-04-868594-8
Heavy Object v03
Heavy Object: Global Shadow (ヘヴィーオブジェクト 巨人達の影, Hevī Obujekuto Kyōjin-tachi no Kage, lit. "Shadow of the Titans") November 10, 2010 [5] ISBN 978-4-04-870051-1
Heavy Object v04
Heavy Object: Theoretical Vein (ヘヴィーオブジェクト 電子数学の財宝, Hevī Obujekuto Denshi Sāgaku no Zaihō, lit. "Treasure of Electron Mathematics") September 10, 2011 [6] ISBN 978-4-04-870549-3
Heavy Object v05
Heavy Object: Purge of Technopics (ヘヴィーオブジェクト 死の祭典, Hevī Obujekuto Shi no Saiten, lit. "Festival of Death") November 10, 2011 [7] ISBN 978-4-04-870997-2
Heavy Object v06
Heavy Object: The Coming of Third Generation (ヘヴィーオブジェクト 第三世代への道, Hevī Obujekuto Daisansedai e no Michi, lit. "Path to the Third Generation") June 10, 2012 [8] ISBN 978-4-04-886624-8
Heavy Object v07
Heavy Object: The Police of Ghosts (ヘヴィーオブジェクト 亡霊達の警察, Hevī Obujekuto Bōrei-tachi no Keisatsu) November 9, 2013 [9] ISBN 978-4-04-866080-8
Heavy Object v08
Heavy Object: Dominion 70% (ヘヴィーオブジェクト 七〇%の支配者, Hevī Obujekuto Nanajū Pāsento no Shihaisha) March 8, 2014 [10] ISBN 978-4-04-866379-3
Heavy Object v09
Heavy Object: Judgement -195℃ (ヘヴィーオブジェクト 氷点下一九五度の救済, Hevī Obujekuto Hyōtenka Ichikyūgodo no Kyūsai) April 10. 2015 [11] ISBN 978-4-04-865064-9
Heavy Object v10
Heavy Object: The Outer Gods (ヘヴィーオブジェクト 外なる神, Hevī Obujekuto Sotonarukami) October 10, 2015 [12] ISBN 978-4-04-865452-4
Heavy Object v11
Heavy Object: Dance with Noble Sister (ヘヴィーオブジェクト バニラ味の化学式, Hevī Obujekuto Banira Aji no Kagaku-shiki) February 10, 2016 ISBN 978-4-04-865764-8
Heavy Object v12
Heavy Object: 0.01mm War (ヘヴィーオブジェクト 一番小さな戦争, Hevī Obujekuto Ichiban Chīsana Sensō) September 10, 2016 ISBN 978-4-04-892353-8
Heavy Object v13
Heavy Object: Girl's Fight at an Altitude of 10,000m (ヘヴィーオブジェクト 北欧禁猟区シンデレラストーリー, Hevī Obujekuto Hokuō Kinryō-ku Shinderera Sutōrī) April 8, 2017 ISBN 978-4-04-892835-9
Heavy Object v14
Heavy Object: Project Whiz Kid (ヘヴィーオブジェクト 最も賢明な思考放棄, Hevī Obujekuto Mottomo Kenmeina Shikō Hōki) September 8, 2017 ISBN 978-4-04-893331-5
Heavy Object v15
Heavy Object: Manhattan on Stage (ヘヴィーオブジェクト 最も賢明な思考放棄 #予測不能の結末, Hevī Obujekuto Mottomo Kenmeina Shikō Hōki) April 10, 2018 ISBN 978-4-04-893787-0
Heavy Object v16
Heavy Object: Vivid Camouflage December 7, 2018 ISBN 978-4-04-912207-7
Heavy Object v17
Heavy Object: Pure-White Countdown October 10, 2019 ISBN 978-4-04-912668-6


There have been three manga adaptations of Heavy Object. The first, illustrated by Inue Shinsuke, was serialized in Dengeki Black Maoh and later Dengeki Maoh between 2009 and 2011, with a single tankōbon volume released. The second, Heavy Object S (ヘヴィーオブジェクトS, Hevī Obujekuto S), illustrated by Saitō Sakae, was also serialized in Dengeki Maoh between 2011 and 2013, with three tankōbon volumes released. The third adaptation Heavy Object A (Ace) (ヘヴィーオブジェクトA(エース), Hevī Obujekuto A (Ēsu)), also by Saitō Sakae and in Dengeki Maoh, began serialization in February 2015.

# Image Title Release Date ISBN
Heavy Object Manga Volume 01
Heavy Object May 27, 2011 [13] ISBN 978-4-04-870429-8
Heavy Object S Manga Volume 01
Heavy Object S01 August 27, 2012 [14] ISBN 978-4-04-886818-1
Heavy Object S Manga Volume 02
Heavy Object S02 December 15, 2012 [15] ISBN 978-4-04-891249-5
Heavy Object S Manga Volume 03
Heavy Object S03 July 27, 2013 [16] ISBN 978-4-04-891803-9
Heavy Object A Manga Volume 01
Heavy Object A01 September 26, 2015 [17] ISBN 978-4-04-865354-1
Heavy Object A Manga Volume 02
Heavy Object A02 April 9, 2016[18] ISBN 978-4-04-865923-9
Heavy Object A Manga Volume 03
Heavy Object A03 December 10, 2016 [19] ISBN 978-4-04-892508-2


An anime adaptation by J.C. Staff was revealed at the Dengeki Bunko Fall Festival on October 5th 2014, together with a teaser trailer. It was scheduled to begin airing in October 2015.[1] A second trailer was shown at Comiket 88.

The anime began airing on October 3rd 2015. Its opening theme is One More Chance, with Dear Brave as the ending theme.


A short story was released shortly after the publication of the first Heavy Object light novel. Quenser, Heivia and Milinda also appeared in the Kamachi 10th Anniversary crossover light novel and manga, Toaru Majutsu no Heavy na Zashiki-warashi ga Kantan na Satsujinki no Konkatsu Jijou, alongside other characters from Kamachi's various works, released on February 10th 2015. The three also appeared with Froleytia in an animated promotional video for the 10th anniversary released on September 10th 2014. Froleytia and Milinda were also featured in the mobile game Toaru Majutsu no Kagaku no Puzzdex for a crossover event. Characters from Heavy Object are also set to appear in the crossover fighting game Dengeki Bunko: Fighting Climax Ignition.


  • The series name's official abbreviation is HO.

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