A Certain Scientific Railgun is a Japanese manga series written by Kazuma Kamachi and illustrated by Motoi Fuyukawa, which began serialization in the April 2007 issue of ASCII Media Works’ Dengeki Daioh magazine. The manga is a spin-off of Kamachi’s A Certain Magical Index light novel series, taking place before and during the events of that series. The manga is licensed in North America by Seven Seas Entertainment, who began publishing the series from June 2011. An anime television series adaptation by J.C. Staff aired in Japan between October 2009 and March 2010, followed by an original video animation released in October 2010. A second season titled A Certain Scientific Railgun S aired between April and September 2013. A third season titled A Certain Scientific Railgun T aired between January and September 2020. The anime is licensed in North America by Funimation.
A Certain Scientific Railgun is illustrated by Motoi Fuyukawa and started serialization in the April 2007 issue of ASCII Media Works’ Dengeki Daioh. The first volume was released on November 10, 2007 and as of October 11, 2018, 14 volumes have been published. North American publisher Seven Seas Entertainment began distributing the Railgun manga from June 2011.
A series of short light novel stories, titled A Certain Railgun SS, were included with the Japanese DVD and Blu-ray Disc releases of A Certain Magical Index and its second season.
A visual novel based on A Certain Scientific Railgun for the PSP was released on December 8, 2011 after facing several delays, and comes in a special edition which includes a Kuroko Shirai Figma figure. The opening theme for the A Certain Scientific Railgun PSP game is “Way to answer” by fripSide.
The opening theme for Railgun, “Only My Railgun”, won Best Theme Song at the 2010 Animation Kobe Awards.
In the futuristic Academy City, which is made up of 80% students, many of whom are espers possessing unique psychic powers, Mikoto Misaka is an electromaster who is the third strongest of a mere seven espers who have been given the rank of Level 5. The series focuses on the exploits of Mikoto and her friends; Kuroko Shirai, Kazari Uiharu, and Ruiko Saten, prior to and during the events of A Certain Magical Index.