History Creator / KazumaKamachi

** ''[[https://tvtropes.org/pmwiki/pmwiki.php/Manga/ACertainScientificDarkMatter A Certain Scientific Dark Matter]]'' (2019-2020), a {{Spinoff}} of the main series starring Kakine Teitoku, the second highest Level 5 and Accelerator's ArchEnemy.

** ''A Certain Scientific Dark Matter'' (2019-2020), a {{Spinoff}} of the main series starring Kakine Teitoku, the second highest Level 5 and Accelerator's ArchEnemy.

->''"If I don’t keep writing, I’ll crash. Like an airplane."''

*** ''A Certain Scientific Mental Out'' (2021, ongoing), both a sequel to ''Astral Buddy'' (drawn by the same artist too) and a {{Spinoff}} of the Railgun manga, starring Level 5 Shokuhou Misaki as the main character.

A Japanese author of various light novels and manga, best known by his first light novel series, ''LightNovel/ACertainMagicalIndex''. Kazuma Kamachi is his pen name, his real name and identity are as of yet unknown. Before becoming the famous writer of the Index light novel series, Kamachi wrote a story entitled ''Schrödinger's City'' as an entry in the 9th Dengeki Game Novel Prize; unfortunately, his submission failed to reach past the third selection stage of the said competition. However, his story caught the attention of the editor-in-chief of Dengeki, and Kamachi later becomes in-charge in writing the book ''Want to Try Writing?'', which became his debut as a professional writer.

* ''LightNovel/ACertainMagicalIndex'' (2004-2010), a light novel series set in a world where science and magic cross paths, with most events taking place in the technologically advanced Academy City located in Japan. It stars Kamijou Touma, a highschool boy with a mysterious ability on his right hand that allows him to negate any kind of supernatural power, be it of esper, magical or divine origin. Continued in a second series called ''A Certain Magical Index: New Testament'' (2011-2019). A third series, ''A Certain Magical Index: Genesis Testament'', began in 2020.

** In his crossover novel Kamachi mentions that he finds girls wearing a long, white, dress-like outfit to have a powerful mystique; which explains the central figures of [[LightNovel/ACertainMagicalIndex some]] [[Literature/ASimpleSurvey of]] [[Literature/TheUnexploredSummonBloodSign his]] works.

* ''Literature/MagisterusBadTrip'' (2018-2020), a web novel (later adapted into a light novel series). The protagonist Kaname Suou is a Dealer, a player in Money (Game) Master, the world's biggest VR online game and an open world financial game in which all sorts of illegal actions like violence and theft are allowed in the pursuit of Snow, the game's currency. Due to the game's massive popularity, Snow is a virtual currency with growing influence in the real world, thus making the game's conflicts part of the global economy.

* ''LightNovel/TheCircumstancesLeadingToWaltrautesMarriage'' (2012), a romantic comedy taking place in a Myth/NorseMythology setting dealing with the relationship between a young human boy called Jack Elvan and Waltraute, the fourth of the nine Valkyrie sisters. Initially released as a series of three short stories in Dengeki Bunko Magazine, they were compiled into a single light novel with an original extra chapter/story.

He also helped work on the anime adaptations of ''A Certain Magical Index'' (including its movie ''Miracle of Endymion'') and ''A Certain Scientific Railgun''. He also wrote the story for the Creator/SquareEnix mobile card battle game ''Anime/MillionArthur''.

* ''LightNovel/HeavyObject'' (2009-2021), a light novel series set TwentyMinutesIntoTheFuture, in a world where gigantic war machines called Objects have completely changed the rules of warfare, rendering all conventional weapons and soldiers practically useless until the protagonists, a battlefield student called Quenser Barbotage and a radar analyst called Heivia Winchell, do the impossible and defeat an Object without using one of their own.

* ''LightNovel/ASimpleSurvey'' (2012-2013), a two-novel series set in a world containing a mysterious force known only as the 'absurd'. It consists of ''A Simple Survey'' and ''A Simple Monitoring'', both of which are mainly made up of a collection of short stories.
* ''LightNovel/TheUnexploredSummonBloodSign'' (2014-2019), a light novel series set in a world where humans have perfected the art of calling upon and summoning gods and other mythical creatures by thoroughly researching and combining aspects of the summoning techniques from all cultures, but in the process accidentally discovering the existence of beings that lurk beyond the gods, the Unexplored-class.

He also helped work on the anime adaptations of ''A Certain Magical Index'' (including its movie ''Miracle of Endymion'') and ''A Certain Scientific Railgun''. He also wrote the story for the Creator/SquareEnix mobile card battle game ''VideoGame/MillionArthur''.

** In his crossover novel Kamachi mentions that he finds girls wearing a long, white, dress-like outfit to have a powerful mystique; which explains the central figures of [[LightNovel/ACertainMagicalIndex some]] [[LightNovel/ASimpleSurvey of]] [[LightNovel/TheUnexploredSummonBloodSign his]] works.

* ReclusiveArtist: He's so reclusive that his background and looks are not known to the public. Kiyotaka Haimura (''A Certain Magical Index''[='s=] illustrator) and Yuyuko Takemiya (''LightNovel/{{Toradora}}'''s author) have met him in person. Kiyotaka only commented that he seems to be a sports-oriented guy, and Yuyuko commented that he's very young-looking.

* ''LightNovel/TheZashikiWarashiOfIntellectualVillage'' (2012-2015), a light novel series taking place in Japan, where the creation of Intellectual Villages, advanced villages that recreate the atmosphere of old rural villages to promote designer and brand name products made with high-tech tools and traditional methods, has resulted in the emergence of {{Youkai}} and with them, Packages, criminal operations making use of their supernatural traits.

* ''[[LightNovel/TheWeaknessOfBeatriceTheLevelCapHolySwordswoman The Weakness of Beatrice the Level Cap Holy Swordswoman That Made Being the Strongest Even More Trouble – His Name? Boo Boo]]'' (2016-2019), a light novel series set in an alternate world of swords and magic with a game-like system, where Beatrice, considered the strongest human, made a promise to a small orc.

* FanNickname: Known to his fans as '''kamachi.exe''' for his notoriously prolific writing ability.

* ''LightNovel/HeavyObject'' (2009, ongoing), a light novel series set TwentyMinutesIntoTheFuture, in a world where gigantic war machines called Objects have completely changed the rules of warfare, rendering all conventional weapons and soldiers practically useless until the protagonists, a battlefield student called Quenser Barbotage and a radar analyst called Heivia Winchell, do the impossible and defeat an Object without using one of their own.

* ''Literature/MagisterusBadTrip'' (2018-2020), a web novel (later adapted into a light novel). The protagonist Kaname Suou is a Dealer, a player in Money (Game) Master, the world's biggest VR online game and an open world financial game in which all sorts of illegal actions like violence and theft are allowed in the pursuit of Snow, the game's currency. Due to the game's massive popularity, Snow is a virtual currency with growing influence in the real world, thus making the game's conflicts part of the global economy.
* ''Sorcery Hacker >> Divulge the Magic Vulnerability'' (2019, ongoing), a light novel set in a fantasy world where humans have established dominance over monsters with sorcery devices, advanced technology that uses magic to function. The protagonist, Ayato Criminaltrophy, is a Sorcery Hacker mercenary that arrives at Sky City Celedileka with his partner Teleria to bust out a human trafficking group, uncovering a much more dangerous threat to the city in the process.
* ''Apocalypse Witch: To the Strongests of an Age of Plenty'' (2019, ongoing), a light novel set in a world besieged by a mysterious Threat that wipes out cities and countries overnight. A select few humans have the ability to use the cutting-edge magic technology known as Crystal Magic, and those with said talent are gathered in Ocean Crystal Magic Academy Grimnoah to train to fight the Threat. Karuta Utagai is a student at Grimnoah, but his life is changed by the sudden visit of one of the Problem Solvers, the world's five strongest magicians who all use old-fashioned God Worshipping Magic. The Problem Solver speaks to the entire student body, calling them all incompetent and announcing the shut down of Grimnoah, thus opening the curtain to a clash between the new magic and the old magic.
* ''When The Cute Kunoichis Spied on Their Teacher's Secret'' (2019, ongoing), a web novel (later adapted into a light novel), taking place in a world where Japan never ended their isolationist phase, and agents from foreign powers are always threatening to steal the country's advanced technology. In order to combat this threat there has been a resurgence of ninjas that use techniques that combine modern technology and traditional methods. The story follows Souha Sugiyado, a 17-year old ninja instructor and former ninja prodigy who was forced to retire from active duty by the wounds he suffered in his last mission.

* ''Literature/MyVampireOlderSisterAndZombieLittleSister'' (2016, ongoing), a web novel series posted on Kamachi's [[http://dengekibunko.jp/author/kamachikazuma/novel/index.html official website]]. The virtual reality environment simulator created by the main character, a boy named Amatsu Satori, is used by his zombie little sister and vampire older sister to compete with each other to infect the residents of the virtual city, all in order to solve a heated debate brought upon Satori's careless words: “If a zombie and vampire went all out, which one would win?”.
* ''I No Longer Know How to Define N and Fantasy'' (2016), a set of two short stories published in Dengeki Bunko Magazine following a nameless first-person protagonist working as a treasure hunter in Japan after a mysterious event called the Collapse of N [[AfterTheEnd destroyed the old modern world]] and brought fantasy, magic and monsters to Earth.

* ''Literature/MagisterusBadTrip'' (2018), a web novel (later adapted into a light novel). The protagonist Kaname Suou is a Dealer, a player in Money (Game) Master, the world's biggest VR online game and an open world financial game in which all sorts of illegal actions like violence and theft are allowed in the pursuit of Snow, the game's currency. Due to the game's massive popularity, Snow is a virtual currency with growing influence in the real world, thus making the game's conflicts part of the global economy.
* ''Sorcery Hacker >> Divulge the Magic Vulnerability'' (2019), a light novel set in a fantasy world where humans have established dominance over monsters with sorcery devices, advanced technology that uses magic to function. The protagonist, Ayato Criminaltrophy, is a Sorcery Hacker mercenary that arrives at Sky City Celedileka with his partner Teleria to bust out a human trafficking group, uncovering a much more dangerous threat to the city in the process.
* ''Apocalypse Witch: To the Strongests of an Age of Plenty'' (2019), a light novel set in a world besieged by a mysterious Threat that wipes out cities and countries overnight. A select few humans have the ability to use the cutting-edge magic technology known as Crystal Magic, and those with said talent are gathered in Ocean Crystal Magic Academy Grimnoah to train to fight the Threat. Karuta Utagai is a student at Grimnoah, but his life is changed by the sudden visit of one of the Problem Solvers, the world's five strongest magicians who all use old-fashioned God Worshipping Magic. The Problem Solver speaks to the entire student body, calling them all incompetent and announcing the shut down of Grimnoah, thus opening the curtain to a clash between the new magic and the old magic.
* ''When The Cute Kunoichis Spied on Their Teacher's Secret'' (2019), a web novel (later adapted into a light novel), taking place in a world where Japan never ended their isolationist phase, and agents from foreign powers are always threatening to steal the country's advanced technology. In order to combat this threat there has been a resurgence of ninjas that use techniques that combine modern technology and traditional methods. The story follows Souha Sugiyado, a 17-year old ninja instructor and former ninja prodigy who was forced to retire from active duty by the wounds he suffered in his last mission.

*** ''A Certain Scientific Railgun Gaiden: Astral Buddy'' (2017, ongoing), a {{Spinoff}} of the Railgun manga starring Hokaze Junko, a previously unnamed minor character in the Railgun manga part of Shokuhou Misaki's clique.
** ''Manga/ACertainScientificAccelerator'' (2013, ongoing), a {{Spinoff}} of the main series starring Accelerator, the second protagonist of the series.

* ''LightNovel/ACertainMagicalIndex'' (2004-2010), a light novel series set in a world where science and magic cross paths, with most events taking place in the technologically advanced Academy City located in Japan. It stars Kamijou Touma, a highschool boy with a mysterious ability on his right hand that allows him to negate any kind of supernatural power, be it of esper, magical or divine origin. Continued in a second series called ''A Certain Magical Index: New Testament'' (2011-2019). Will have a third series in 2020.