Nitroplus Co., Ltd., currently styled as NITRO PLUS, formerly stylized as nitro+, and formerly known as "OKStyle", is a Japanese

visual novel A visual novel (VN) is a form of digital interactive fiction. Visual novels are often associated with the medium of video games, but are not always labeled as such themselves. They combine a textual narrative with static or animated illustratio ...

video game developer A video game developer is a software developer specializing in video game development – the process and related disciplines of creating video games. A game developer can range from one person who undertakes all tasks to a large business with em ...

that has developed a number of

s, including

eroge An ''eroge'' (, ''eroge'', or , ''erogē'', ), also called an H-game, is a Japanese genre of erotic video game. The term encompasses a wide variety of Japanese games containing erotic content across multiple genres. The first ''eroge'' were crea ...

. They have also collaborated with developer

Type-Moon Type-Moon (stylized as TYPE-MOON) is a Japanese video game company, best known for their visual novels, co-founded by author Kinoko Nasu and illustrator Takashi Takeuchi. It is also known under the name for its publishing and corporate operation ...

to create the

light novel A is a type of Genre fiction, popular literature novel from Japan usually classified as young adult fiction, generally targeting Adolescence, teens to Young adult, twenties or older. The definition is very vague, and wide-ranging. The abbr ...

series '' Fate/Zero''. Their works usually have dark themes such as reanimation of the dead,

rape Rape is a type of sexual assault involving sexual intercourse, or other forms of sexual penetration, carried out against a person without consent. The act may be carried out by physical force, coercion, abuse of authority, or against a person ...

, and

murder Murder is the unlawful killing of another human without justification (jurisprudence), justification or valid excuse (legal), excuse committed with the necessary Intention (criminal law), intention as defined by the law in a specific jurisd ...

. They also have a branch of the company called Nitro+chiral, which focuses on

boys' love , also known by its abbreviation , is a genre of fictional media originating in Japan that depicts Homoeroticism, homoerotic relationships between male characters. It is typically created by women for a female audience, distinguishing it fro ...

visual novels. Writers aligned with the company, such as

Gen Urobuchi is a Japanese novelist, visual novel writer and anime screenwriter. He is known for being the co-creator of the highly acclaimed and commercially successful anime series '' Puella Magi Madoka Magica'', which earned him the Tokyo Anime Award for ...

, have also contributed to various

manga are comics or graphic novels originating from Japan. Most manga conform to a style developed in Japan in the late 19th century, and the form has a long history in earlier Japanese art. The term is used in Japan to refer to both comics ...

anime is a Traditional animation, hand-drawn and computer animation, computer-generated animation originating from Japan. Outside Japan and in English, ''anime'' refers specifically to animation produced in Japan. However, , in Japan and in Ja ...

, novels, and television works. Super Sonico is the mascot of Nitroplus's annual music festival event "Nitro Super Sonic" since 2006. Nitroplus has held their music festival every year since 2000. Ouka Satsurikuin was Nitroplus's original mascot before Super Sonico. In June 2024, Nitroplus announced that

CyberAgent is a Japanese digital advertising company, which was founded in 1998 by Susumu Fujita and headquartered in Shibuya, Tokyo. It is owned by Susumu Fujita with 20.50% interest; Fujita is the representative director, while Yusuke Hidaka is the execut ...

acquired 72.5% of the company for 16.7 billion yen, making it a subsidiary. CyberAgent published a public relations interview about Nitroplus' decision to become a consolidated subsidiary, stating that Nitroplus approached CyberAgent for the merger after the company acquired Nelke Planning a year prior, which Takaki Kosaka, the representative director of Nitroplus, had a stake in as an independent director. The primary goal of the acquisition is for CyberAgent to take over the administrative and distribution aspects of the business so that Nitroplus can focus on content production, including reviving projects that were abandoned due to time constraints or lack of resource management. There are also plans for this partnership to help Nitroplus expand its influence overseas and strengthen the Touken Ranbu brand. In a follow up statement released on their company website, Nitroplus went on to clarify that the type of content produced by the company will not change, only the quality and quantity of the content.

List of works

*'' Phantom of Inferno'' (February 25, 2000) *''Vampirdzhija Vjedogonia'' (January 26, 2001) *'' Kikokugai: The Cyber Slayer'' (March 29, 2002) *''"Hello, world."'' (September 27, 2002) *''Zanma Taisei Demonbane'' (April 25, 2003) *'' Saya no Uta'' (December 26, 2003) *''Phantom INTEGRATION'' (September 17, 2004) *''Angelos Armas -Tenshi no Nichou Kenju-'' (January 28, 2005) *'' Jingai Makyō'' (June 24, 2005) *''Hanachirasu'' (September 30, 2005) *''Sabbat Nabe'' (December, 2005) *''Dra†KoI'' (February 3, 2006) *''Kishin Hishou Demonbane'' (May 26, 2006) *'' Gekkō no Carnevale'' (January 26, 2007) *''Zoku Satsuriku no Django -Jigoku no Shoukinkubi-'' (July 27, 2007) *''Sumaga'' (September 26, 2008) *''Sumaga Special'' (June 26, 2009) *'' Full Metal Daemon: Muramasa'' (October 30, 2009) *''Axanael'' (December 17, 2010) *'' SoniComi'' (November 25, 2011) *''Phenomeno'' (June 16, 2012) *'' Guilty Crown: Lost Christmas'' (July 27, 2012) *''Kimi to Kanojo to Kanojo no Koi'' (June 28, 2013) (Officially localized as ''You and Me and Her: A Love Story'') *'' Expelled from Paradise'' (November 15, 2014) *'' Nitroplus Blasterz: Heroines Infinite Duel'' (April 30, 2015, developed by Examu) *''Tokyo Necro'' (January 29, 2016) *'' Thunderbolt Fantasy'' (July 8, 2016) *''Minikui Mojika no Ko'' (July 27, 2018) *'' Smile of the Arsnotoria'' (March 4, 2021) *'' Rusty Rabbit'' (April 17, 2025) *''Dolls Nest'' (April 24, 2025) They also released a fighting game ''Nitro+ Royale -Heroines Duel- (ニトロ+ロワイヤル -ヒロインズデュエル-)'' at the 2007 Comiket.

5pb. x Nitroplus

*'' Chaos;Head'' (April 25, 2008) *'' Chaos;Head Noah'' (February 26, 2009) *'' Steins;Gate'' (October 15, 2009) *'' Chaos;Head Love Chu Chu!'' (March 25, 2010)

DMM x Nitroplus

Nitroplus and DMM Corporation released a web browser game called '' Touken Ranbu'' in January 2015, which as of March 2015 is one of DMM's most popular games, second only to the largely popular

Kantai Collection , abbreviated as , is a Japanese free-to-play web browser game developed by Kadokawa Games and published by DMM.com. The central theme of the game is the representation of World War II warships Moe anthropomorphism, personified as teenage girls ...

. In 2022, Nitroplus and DMM, in collaboration with Koei Tecmo Games and their in-house development teams,

Omega Force (stylised as ''ω-Force'') is a Japanese video game developer and a division of Koei Tecmo, founded in 1996 by Akihiro Suzuki and Kenichi Ogasawara, and is best known for the ''Dynasty Warriors'' video games. History Omega Force was founded ...

and Ruby Party, developed and published a new entry in the series, '' Touken Ranbu Warriors'' for the Nintendo Switch and PC.

Nitro+Chiral branch works

Nitro+Chiral focused to boys-love games. * '' Togainu no Chi'' (February 25, 2005/May 29, 2008) * ''Lamento -Beyond the Void-'' (November 10, 2006) * ''Sweet Pool'' (December 19, 2008) * '' DRAMAtical Murder'' (March 23, 2012) * ''DRAMAtical Murder re:connect'' (April 26, 2013) * ''Slow Damage'' (February 25, 2021) On January 25, 2008, they released a minigame disk titled ''CHiRALmori'' under this branch of which uses chibi versions of the characters from '' Togainu no Chi'' and ''Lamento''.

References

External links

*
Nitro+Chiral website
{{Authority control Video game companies of Japan Video game development companies Japanese companies established in 2000 Video game companies established in 2000 Software companies based in Tokyo Taitō