Kamijou Touma/Misc.

Toaru Majutsu no Index Light Novel Volume SS2
Touma briefly appears after Kumokawa Seria's conversation with Kaizumi Tsugutoshi one of Academy City's board of directors, who suggested that Touma is a Gemstone, which Seria denies as Touma is something much more interesting.

During his short appearance, Touma once again runs into another misfortune and gets himself wet, while he is being observed by Seria who is interested on how Touma comes into misfortune.

Toaru Majutsu no Index SS: Stiyl
Touma is featured in the main storyline of the side story, where he accidentally meets up and takes the boss of Dawn-colored Sunlight, Leivinia Birdway, believing her to be a helpless girl, and later gets involved in a plan where he is used as a decoy by her, at the same time that Stiyl is operating in the city. In the end Touma is given an offer by her to become a servant, where he declines, much to her disbelief as she thought that he would follow her.

Toaru Majutsu no Index SS: Love Letter Competition
Bundled with Rainbow Spectrum Colors, the short story focuses on Kumokawa Seria's attempts on finding out a spy, by sending out a fake love letter to be delivered to Touma during a time when he is absent. This causes a ruckus with people who are familiar to him.

Touma himself appears near the end of the story, discovering the insanity caused by Seria and confronts her about it. Touma doesn't get a clear answer from her, but only gets a cryptic response wherein she implies she knows of his memory loss.

Toaru Majutsu no Index: Road to Endymion
Kamijou Touma becomes involved with Stiyl's mission against a magic cabal that has infiltrated the city and plans to burn it down with a magic spell. He later meets and defeats one of the members of the magic cabal, Sozty Exica, and becomes a strong ally with her after her sister destroys their cabal. Touma becomes embroiled in a race against time with the world on the line as Sozty's sister, Ureapaddy Exica, plans to attack to shoot her devastating Brahma Astra to select targets in the world using the falling stars as the signal. His knowledge in the city, its technology, and its current affairs proves invaluable in catching up to Ureapaddy.

Toaru Majutsu no Index Movie: Miracle of Endymion
Touma is a central character in the movie, where he and Index meet aspiring idol Meigo Arisa in the streets, and becomes embroiled in a struggle between magic and science sides wanting her. Touma is later tasked on preventing the plans of Ladylee Tangleroad in coming to fruition along with Index, as she would bring the world to destruction using the Endymion. He later stops Shutaura Sequenzia from killing Arisa, breaking her illusions, and allowing her to discover the truth about herself, that she and Arisa are the same person, with Arisa being born out of a desire to create a miracle. Touma is the first one to witness Shutaura merging back with Arisa, but falls unconscious due to his injuries.

He later admits to Index that Arisa was not an illusion as his right hand did not destroy her, and along with Index, later hears a song only the two of the could hear, believing it to be from their friend.

Toaru Kagaku no Railgun OVA
Touma appears briefly before Mikoto near a certain vending machine, here he greets Mikoto as Biribiri and gets attacked for it, and later gets blamed by Mikoto for being the one who is constantly watching her, however, he denies this. He is later demanded by Mikoto to fight her again, however, she is stopped by the arrival of Anti-Skill who also mistakes them for having a lover's quarrel.

Toaru Majutsu no Index-tan
Touma appears in Toaru Majutsu no Index-tan where he re-enacts his role in the series, albeit in a more skewered manner. Here he meets Index-tan a smaller version of Index on his balcony like the in the original series although she is quickly picked up by bird. Touma and Index-tan are later seen where Index-tan on top of his head while he is walking while parodying the antics of Shana-tan (another of J.C. Staff's parody of a series, specifically Shakugan no Shana) while asking the viewer to purchase the Shakugan no Shana DVD. Touma is later seen being beaten-up by Kaori while she rambles on about what happened with her voice actress being drunk. During the part where Touma insert his right hand inside Index-tan's mouth to disable the magic within her, Touma says "such misfortune" after being vomited upon by Index-tan. Later he is apparently killed by Stiyl and Kaori after convincing them to stop being side characters. Finally Touma and Index-tan watch a commercial featured by Motoharu and Aogami Pierce, asking Index-tan to be quiet after her amazement.

In the second episode, Touma meets Index-tan again and instead of being taken by a bird she is taken by a cat. During the fight between Touma and Accelerator, when Touma slaps Accelerator hand away Accelerator somehow blushed because of this. Later Touma gets scared and wets his pants after seeing Komoe's car being driven by Komoe (although she cannot be seen). When Touma is waiting for Hyouka and Index-tan in a changing booth, he comments on how they are mumbling the song they are singing as to go around copyright laws. When Touma is the hospital he is visited by Index-tan and a disguised Kuroko, who mistakes the antics of Touma's voice actor for his. Lastly Touma is apparently caught-up in the blast caused by Accelerator using his plasma storm, after Mikoto clones backfire in their plan in manipulating the windmills, which they blew up.

In the third episode, the meeting with Index is reenacted again, however, this time Index-tan now has the form of and references the show and the similarity between them before she is later taken away by Sphynx. The first episode of the 2nd season is later used in the second sketch; during the scene where Touma is searching for Index-tan, Sphynx runs away which forces Touma to follow, however, when he arrives where Sphynx stopped, it had been replaced by another cat. Another sketch features Touma walking with Index-tan on his head, while Angelene has Agnese-tan on the top of her head, here, Touma is later abused by both Index-tan and Agnese-tan, though is unfazed by it. The last notable sketch Touma is in is where he is attacked by Kaori during the English Knight's arrival at Japanese soil, here, after being taken to a hospital Kaori leaves after leaving a present and a letter, apologizing for her behavior (and once again referencing Kaori's seiyu's drunken antics) as well promising to for it with her body.

The fourth episode, the meeting with Index is once again reenacted, however, instead Touma punches Index-tan in a reference of Saint Seiya far away after asking for food. In another sketch, Touma seemingly makes fun of a choking Aisa while rubbing her back, by continually asking her if she is okay even though she tells him that it's nothing. At this point, Seiri appears for no apparent reason to tell Touma that she has a front hook bra, which immediately engrosses Touma, as he likes front hook bras since they are "action-ready" and "easily-accessible". In the final scene, Touma and Index-tan are seen walking together again, whither Touma begins to doubt the comedy shorts continued existence since they are running out of things to do, they are start arguing with Index-tan inevitably pulling his hair until she tires out. In the end Touma suggests of talking Orsola Aquinas instead, which angers Index-tan.

Toaru Majutsu no Index (PSP game)
Touma appears as a playable character in the Toaru Majutsu no Index video game. Touma's route in the story mode follows the novel adaptations, such as his fight with Stiyl, Kaori, Mikoto, Accelerator, Motoharu, his meeting with Hyouka, and his fight against Oriana Thomson, notwithstanding the notable abscence of other characters such as Sherry Cromwell, Agnese Sanctis, Vento of the Front, etc., he fought. His final battle in the story is with Acqua of the Back. Later, in the final story for the game, Touma is the character the player is forced to use to battle agains the magician from the future, Touma later reappears for real before the player and uses his Imagine Breaker to break the magician's illusions. Touma waves goodbye as he leaves the player, ending the story mode.

Like his other media counterparts, Touma is mainly a closed ranged, melee fighter, using his fists and kicks for attack. Touma is vulnerable to long-ranged attacks, but can easily be negated if Touma's hand or fist is out and that the attacks are supernatural in nature, and can be compensated through the use of a partner. All his attacks can easily be set-up, allowing for him to recover quickly if he misses. Touma is the only character in-game that can damage his opponent with his taunt.

Touma's finishing move is notable as it features the use of the dragon arm that appears during the Deep Blood Arc.

Dengeki Gakuen RPG: Cross of Venus
Touma appears as a supporting non-player character in the game. Talking to Touma is one of the requirements in accessing a battle against Misaka Mikoto, a playable character in the game if she is beaten.

Lunatia
Touma is part of the NPC characters that will assist the player in the Japanese version of the Korean MMORPG Lunatia.

Lucent Heart
The Japanese Lucent Heart developed by Gamania Digital Entertainment disclosed that Touma, along with Index and Misaka Mikoto will be added as "selectable skins" for the players to use.

References in other media
Being the main character of Toaru Majutsu no Index, allows Touma to be referenced by other works in media, although to a somewhat lesser extent than Misaka Mikoto. Most notably he is often referred to in works where his "Break your illusions" is satirized.
 * An eyecatch at episode 11 of the anime features the main protagonist asking the viewer who is the person that looks like him – as he has similar features to Touma, and states that it is just the viewer's imagination and almost says that he will use his Imagine Breaker before being cut-off.
 * In the final episode of the flash anime Haiyore Nyaruko-san, Nyaruko tells the main male character that she used to blow-up the make-believe games of her fellow playmates when she attended space kindergarten; she later utters a similar phrase to Touma's "break that illusion" and later references Touma's Imagine Breaker, with Touma's silhouette as well as a red logo similar to Toaru Majutsu no Index title's style appearing on screen.
 * Touma is referenced once more in the second season of the anime series, Haiyore! Nyaruko-san W in the sixth episode when Kuune, the elder cousin of Cthugian Kuuko attempts to woo her younger sister into incestuous marriage. She declares that she will "destroy that illusion" of her cousin's due to her (fake) engagement to the protagonist, Mahiro. A similar red magical circle appears on the screen when she delivers her strike. Kuune is voiced by Ryoka Yuzuki who also voiced Oriana Thomson in Toaru Majutsu no Index II.
 * In the third episode of Denpa Onna to Seishun Otoko, the main character Makoto Niwa recites Touma's infamous line, although he clenches his left fist.
 * In the Drama CD of Boku wa Tomodachi ga Sukunai, the voice actress who does Index, Yuka Iguchi who there plays a Character named Maria references Index several times while Maria herself is supposed to be working as a voice actress; eventually coming to the point where she uses the "I'll destroy that illusion of yours" line.
 * In the 13th episode of Mayoi Neko Overrun!, as the heroines are reflecting on the events during the series, when talking about the main characters misfortune the Imagine Breaker is referenced when one of them says, "Your right hand is probably nullifying something like the power of good luck".

Trivia

 * There was a mistranslation when spoilers of Volume 16 first came out, with Fiamma stating Imagine Breaker is similar to the 'Holy Stone'. In actuality it's the 'Holy Right', as the kanji for Right and Stone are very similar (石 - stone; 右 - right).
 * According to the Toaru Kagaku no Railgun manga, because he has to cook for himself, he possesses great culinary skills.
 * The novels point out that his zodiac sign is Aquarius.
 * There is a sort of running gag in the show with Touma being fond of telling people that he'll "break their illusion", before proceeding to beat them with his right hand. More specifically, he says "I'll kill it... That illusion/fantasy of yours!!" It's actually a pun: The Kanji given for 'Imagine Breaker' is 'Illusion/Fantasy Killer (Genso Goroshi)', hence this gag, most times Touma says this line, a particular music track can be heard, the track is named "Gensou Koroshi" also.
 * Touma has consistently been voted the most popular character (both male and overall) in the Toaru Majutsu no Index light novels.
 * Currently, the only Science Side characters who know Touma's involving in the incidents of the Magic Side are Aleister Crowley, Etzali, Tsuchimikado Motoharu, Kazakiri Hyouka, Accelerator and Hamazura Shiage.
 * Almost every person Touma defeats throughout the whole series also ends up fighting alongside him later in the series.
 * It is understood that he is a threat for a Kihara or at least for Kihara Byouri when Enshuu uses those patterns in relation to Touma.
 * Ironically, despite having a preference for older women, most of the girls Touma attracts are considerably younger than him. But in an interview, Kamachi specified Touma was kidding when he said he liked older women.