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A Certain Magical Index season 2

A Certain Magical Index II is the second season of the Japanese anime television series A Certain Magical Index, adapted from the light novel series of the same name written by Kazuma Kamachi and illustrated by Kiyotaka Haimura. Produced by J.C. Staff under the direction of Hiroshi Nishikiori, the season consists of 24 episodes and originally aired in Japan from October 8, 2010, to April 1, 2011. It continues the story set in a world where advanced science and ancient magic coexist, focusing on the ongoing adventures of protagonist Touma Kamijou and his allies as they confront escalating threats from both scientific and magical factions. The narrative picks up shortly after the events of the first season, with Index remaining a target for various powerful organizations due to the 103,000 forbidden magical grimoires stored in her memory, which they seek to exploit or erase her to access. Touma, an Academy City high school student whose right hand possesses the unique ability known as Imagine Breaker to nullify supernatural powers, continues to protect alongside characters like the . Key story arcs explore deepening conflicts, including pursuits by the Roman Catholic Church and internal strife within Academy City, blending action, comedy, and themes of science versus magic while introducing new antagonists and alliances. In terms of production, the season features music composed by Maiko Iuchi, with opening themes "No buts!" and "See visionS" performed by Mami Kawada, and ending themes "Magic∞world" and "Memories Last" by Maon Kurosaki. Voice acting highlights include Atsushi Abe as Touma Kamijou, Yuka Iguchi as Index, and Rina Satō as Mikoto Misaka, maintaining continuity from the first season. The series aired primarily on AT-X and other networks, contributing to the franchise's expansion that includes spin-offs like A Certain Scientific Railgun.

Synopsis

Overall plot

The second season of continues the story of Touma Kamijou, a high school student in Academy City whose right hand possesses the Imagine Breaker ability to negate supernatural powers, and his roommate , a with a photographic memory containing 103,000 forbidden magical grimoires. As Index remains a target for capture by various powerful factions seeking to exploit her knowledge, Touma becomes increasingly entangled in escalating conflicts between the scientific espers of Academy City and the magical societies of the world, including heightened threats from the Roman Catholic Church and other international magical organizations. Building directly on the unresolved magical threats introduced in the first season—such as the ongoing pursuit of and the broader clash between science and magic—the narrative assumes familiarity with Touma's power negation and Index's grimoire library while delving deeper into the Imagine Breaker's pivotal role in resolving both and magical confrontations. This escalation introduces greater involvement from global factions, expanding the scope of battles beyond Academy City and emphasizing themes of international intrigue and the delicate balance between opposing supernatural paradigms. The season also briefly touches on character developments like Touma's quest to recover lost memories, heightening personal stakes amid the larger conflicts. Comprising 24 episodes, each approximately 24 minutes in length, the season forms a continuous storyline adapted from light novel volumes 7 through 13 of Kazuma Kamachi's series, without standalone filler episodes to maintain narrative momentum.

Major story arcs

Season 2 of A Certain Magical Index is structured around several major story arcs, adapting content from light novels volumes 7 through 13 and expanding the conflict between the scientific world of Academy City and various magical factions. These arcs escalate the narrative from personal rescues and internal threats to broader international intrigues, introducing deeper interplays between esper abilities and magical organizations. The first arc, spanning episodes 1–5 and known as the Orsola Aquinas Rescue Arc, centers on the Roman Catholic Church's aggressive pursuit of Orsola Aquinas, a renowned for her expertise in translating grimoires. The conflict arises when Roman Catholic forces, led by the Agnese Sanctions, kidnap Orsola to exploit her skills in deciphering the forbidden Book of the Law, a powerful magical document capable of summoning deadly grimoires. Kamijou Touma and intervene, allying with the Amakusa-Style Remix of Church, a Catholic , to rescue her amid naval battles involving a disguised magical fleet. This arc highlights the tensions between rival Christian denominations and the ethical dilemmas of wielding ancient magical knowledge. Episodes 6–7 cover the Tree Diagram Remnant Arc, where factions seek a remnant of Academy City's supercomputer Tree Diagram, leading to action involving esper Kuroko Shirai, teleporter Musujime Awaki, and , emphasizing science-side threats and crossovers with . The Daihaseisai Festival Arc, spanning episodes 8–13, unfolds during Academy City's annual multi-school sports festival, the Daihaseisai, which draws massive crowds and temporarily lowers the city's defenses. Terrorist elements, including rogue skill-out groups and infiltrating magicians, exploit the event to launch attacks, leading to chaotic clashes between and magic users. Touma navigates the festival's competitions and crowds to thwart coordinated disruptions that threaten civilian safety, revealing underlying plots to undermine Academy City's scientific dominance. This arc intensifies the science-versus-magic divide through high-stakes action amid the festive backdrop. In the La Regina del Mare Adriatico Arc (also known as the Queen's Fleet Arc), episodes 14–16, the narrative shifts to and political intrigue within the magic side. Touma wins a cruise vacation, but the ship is revealed to be a powerful magical weapon targeted by Roman Catholic forces. The Anglican Church's Necessarius organization mobilizes against the plot to hijack the vessel, drawing in Touma and allies to prevent escalation into open war between churches. This storyline explores covert alliances and betrayals among European magical societies, with naval confrontations underscoring the global stakes of magical supremacy. Episodes 17–18 comprise the Document of Constantine Arc, where the Roman Catholic Church's pursuit of a powerful document leads to further confrontations, deepening the rift between churches and introducing new magical artifacts. The season concludes with episodes 19–24 in the early stages of the Academy City Invasion Arc (adapting volumes 12–13), featuring the powerful Saint Acqua of the Back's assault on Academy City to seize Imagine Breaker, involving and other key characters in intense battles that set the stage for larger conflicts. This arc highlights internal strife within Academy City and the convergence of science and magic threats. Each arc builds progressively on the last, transitioning from localized incidents in the Orsola and Tree Diagram arcs to the festival chaos of Daihaseisai, multinational naval conspiracies in La Regina del Mare Adriatico, ecclesiastical document pursuits, and culminating in the direct invasion of Academy City. This escalation mirrors the growing involvement of international magical cabals, shifting from isolated incidents to threats that could ignite full-scale conflicts between the magic and science worlds. Unique to season 2 is its adaptation of light novel volumes 7–13, which introduces pivotal alliances between esper protagonists from Academy City and magicians from diverse sects, fostering themes of reluctant cooperation against common foes.

Cast and characters

Main cast

The main cast of A Certain Magical Index season 2 centers on the core protagonists and antagonists whose abilities and personal stakes propel the conflicts between Academy City's scientific and external magical forces. Touma Kamijou (voiced by Atsushi Abe in Japanese and in English), serves as the central protagonist, a high school student in Academy City rated as a Level 0 whose right hand houses the Imagine Breaker ability, capable of nullifying any power—whether esper-based, magical, or divine—upon contact. Physically depicted as a spiky-haired teenager in a , Touma's misfortune-prone nature and unyielding sense of justice position him at the forefront of season 2's escalating confrontations, where his negation power proves essential against increasingly complex magical threats, highlighting his development in navigating both scientific and arcane battles. Index Librorum Prohibitorum (voiced by in Japanese and in English), is the titular nun and a key magical figure, a petite girl with silver hair and a distinctive who possesses an containing 103,000 forbidden grimoires, making her a living library of arcane knowledge central to the season's magical intrigues. Her reliance on Touma for protection underscores the blending of magic and science, as her vast stored texts draw pursuers from Church organizations, amplifying the narrative's exploration of hidden magical elements within Academy City. Mikoto Misaka (voiced by in Japanese and in English), is a prominent known as the "," a short brown-haired middle school student from the elite Tokiwadai Middle School with the Electromaster ability to generate and manipulate electricity at high voltages, often manifesting as coin-launched hypersonic projectiles. In season 2, her personality and formidable combat prowess drive involvement in Academy City's internal power struggles, particularly during events like the Daihaseisai festival, where her status as the third-ranked intersects with broader city-wide conflicts. Shiage Hamazura (voiced by in Japanese and Andrew Love in English), represents the underdog perspective as a Level 0 and member of the Skill-Out gang, portrayed as a lanky, brown-haired skilled in street survival rather than feats, emphasizing the struggles of non-esper delinquents in City's hierarchy. His expanded role in season 2 highlights the gritty dynamics of Skill-Out operations and villainous undercurrents, showcasing his resourcefulness and moral compass amid gang rivalries and city enforcements. (voiced by in Japanese and in English), is the season's primary antagonist-turned-antihero, the top-ranked with white hair, a for ability control, and the power to manipulate vectors—redirecting momentum, force, or energy in any direction—which renders him nearly invincible in combat. His calculating demeanor and reliance on a passive reflection field amplify his role in season 2's villainous escalations, particularly in arcs involving experimental threats and power imbalances within Academy City.

Recurring cast

Orsola Aquinas, a Roman Catholic pursued by her own for her knowledge of the forbidden The Book of the Law, is introduced as a key in the opening of 2, embodying the external threats from Catholic factions and appearing in the first four episodes. She is voiced by in Japanese and Mallorie Rodak in the English dub. Stiyl Magnus, a rune-based and ally from the Anglican 's Necessarius organization, recurs throughout 2 in various magical confrontations, including the Orsola and later subplots, providing combat support and strategic insight across approximately 8 episodes. He is voiced by in Japanese and in the English dub. Kanzaki Kaori, a powerful swordswoman affiliated with the , features prominently in the Orsola arc, highlighting her role in church alliances and physical confrontations. She is voiced by in Japanese and Morgan Lauré Garrett in the English dub. Laura Stuart, the Archbishop of the and leader of Necessarius, appears in select episodes to oversee magical operations and church politics, influencing events from afar in about 3 episodes. She is voiced by in Japanese and Carli Mosier in the English dub. The Knight Leader, commander of the Knights of , is introduced toward the end of season 2 in the buildup to fleet battles, representing military aspects of church conflicts in 2 episodes. He is voiced by in Japanese and in the English dub. Other recurring guest characters unique to season 2 include international magicians such as Acqua of the Back (voiced by in Japanese and Andrew T. Chandler in English, appearing in 1 episode as a God's Right Seat member) and Vento of the Front (voiced by Akiko Hiramatsu in Japanese and in English, appearing in 3 episodes), who drive subplots involving global magical threats.

Episodes

Episode list

The second season, titled Toaru Majutsu no Index II, consists of 24 episodes that aired from October 8, 2010, to April 1, 2011, primarily broadcast on AT-X on Fridays at 23:30 JST, with subsequent airings on other networks. The episodes adapt volumes 7 through 13 of the light novels and are grouped into major story arcs as follows: episodes 1–5 cover the ; episodes 6–7 cover the ; episodes 8–13 cover the ; episodes 14–16 cover the ; and episodes 17–24 cover the .
Ep.English titleOriginal titleAir dateArcSynopsis
1The Last Day (August 31)8月31日 (さいごのひ) (Saigo no Hi)October 8, 2010Orsola Aquinas ArcTouma faces a mysterious threat on the final day of August.
2The Book of Law法の書 (Hō no Sho)October 15, 2010Orsola Aquinas ArcIndex encounters a dangerous magical book that attracts trouble.
3The Amakusa Church天草式 (Amakusa-shiki)October 22, 2010Orsola Aquinas ArcTouma meets a group of magical practitioners from the Amakusa Church.
4Sheol Fear (Voice of the Magicbane)魔滅の声 (シェオールフィア) (Sheōru Fia)October 29, 2010Orsola Aquinas ArcA powerful magical force disrupts the city’s balance.
5Lotus Wand蓮の杖 (ロータスワンド) (Rōtasu Wando)November 5, 2010Orsola Aquinas ArcTouma investigates a magical artifact causing chaos.
6Remnant (Wreckage)残骸 (レムナント) (Remunanto)November 12, 2010Tree Diagram Remnant ArcThe aftermath of a battle leaves lingering mysteries.
7Move Point (Coordinate Relocation)座標移動 (ムーブポイント) (Mūbu Pointo)November 19, 2010Tree Diagram Remnant ArcTouma deals with a teleportation-related incident.
8The Daihasei Festival大覇星祭 (Daihaseisai)November 26, 2010Daihasei Festival ArcThe city hosts a festival that draws unexpected conflicts.
9Route Disturb (Pursuit Inhibited)追跡封じ (ルートディスターブ) (Rūto Disutābu)December 3, 2010Daihasei Festival ArcTouma faces obstacles while tracking a dangerous target.
10Shorthand (Stenographic Sourcebook)速記原典 (ショートハンド) (Shōtohando)December 10, 2010Daihasei Festival ArcA secretive text sparks a magical investigation.
11Stab Sword刺突杭剣 (スタブソード) (Sutabu Sōdo)December 17, 2010Daihasei Festival ArcTouma confronts a warrior wielding a unique weapon.
12Belvedere (The Observatory)天文台 (ベルヴェデーレ) (Beruvedēre)December 24, 2010Daihasei Festival ArcA high vantage point becomes a battleground.
13Croce di Pietro (Apostolic Cross)使徒十字 (クローチェディピエトロ) (Kurōche di Pietoro)January 7, 2011Daihasei Festival ArcA religious symbol triggers a magical confrontation.
14City of Water水の都 (Mizu no Miyako)January 14, 2011La Regina del Mare Adriatico ArcTouma travels to a city surrounded by water facing a crisis.
15Queen's Fleet女王艦隊 (Joō Kantai)January 21, 2011La Regina del Mare Adriatico ArcA naval force arrives with hidden intentions.
16Rosary of the Appointed Time刻限のロザリオ (Kokugen no Rozario)January 28, 2011La Regina del Mare Adriatico ArcA mystical rosary causes time-related disturbances.
17Penalty Game罰ゲーム (Batsu Gēmu)February 4, 2011Academy City Invasion ArcTouma gets involved in a high-stakes challenge.
18Serial Number (Specimen Number)検体番号 (シリアルナンバー) (Shiriaru Nanbā)February 11, 2011Academy City Invasion ArcA numbered experiment sparks concern.
19The Researcher (Amata Kihara)木原数多 (けんきゅうしゃ) (Kenkyūsha)February 18, 2011Academy City Invasion ArcA scientist’s actions threaten the city.
20Hound Dog (Hound Squad)猟犬部隊 (ハウンドドッグ) (Haundo Doggu)February 25, 2011Academy City Invasion ArcA specialized team begins a dangerous operation.
21Testament (Learning Device)学習装置 (テスタメント) (Tesutamento)March 4, 2011Academy City Invasion ArcA learning device causes unexpected problems.
22The Divine Retribution Spell天罰術式 (Tenbatsu Jutsushiki)March 11, 2011Academy City Invasion ArcA powerful spell is unleashed in the city.
23Prewar開戦前 (Kaisenmae)March 25, 2011Academy City Invasion ArcTensions rise as war looms on the horizon.
24Armed Gang (Skill-Out)武装集団 (スキルアウト) (Sukiru-Auto)April 1, 2011Academy City Invasion ArcAn armed group causes chaos in the streets.

Adaptations and changes

The second season of A Certain Magical Index serves as a faithful adaptation of light novels volumes 7 through 13 by Kazuma Kamachi, encompassing the Orsola Aquinas Arc (volume 7), Tree Diagram Remnant Arc (volume 8), Daihasei Festival Arc (volumes 9–10), La Regina del Mare Adriatico Arc (volume 11), and Academy City Invasion Arc (volumes 12–13, including introductory elements involving Acqua of the Back). Unlike some anime series, it includes no original filler content, sticking closely to the source material's core events and character developments, though it rearranges the arcs out of sequential light novel order for pacing. To accommodate the visual medium, the condenses the light novels' lengthy internal monologues and expository passages into streamlined visual action sequences and concise dialogue, reducing the dense world-building while preserving key points. This approach makes the more accessible for viewers but sacrifices some of the novels' intricate and philosophical depth. Pacing adjustments restructured the arcs to span 24 episodes, including the consolidation of subplots within the Daihasei Festival Arc and Academy City Invasion Arc to maintain momentum and avoid the source material's occasional drag from extended political intrigue. Additional scenes emphasizing esper-magic hybrid confrontations were incorporated to heighten tension and visual dynamism in battles, altering minor aspects of church politics for clearer resolution without deviating from the overall storyline. The introduces unique elements such as enhanced and for depicting abilities and magical phenomena, which expand on the novels' textual descriptions to create more immersive action— for instance, fluid animations of psychokinetic forces and invocations that blend science-fiction and fantasy aesthetics. These visual enhancements, including directorial techniques like split screens during multi-perspective conflicts, differentiate the adaptation while reinforcing the clash between powers and magical systems.

Production

Development and announcement

The second season of the anime series , titled A Certain Magical Index II, was officially green-lit in June 2010, following the broadcast of the first season from October 2008 to March 2009. The announcement appeared in the July 2010 issue of Square Enix's Monthly Shōnen Gangan magazine, which included an early key visual illustration featuring protagonists , Tōma Kamijō, and . Production responsibilities were assigned to , the studio that handled the first season, ensuring continuity in animation style and staff involvement. The adaptation focused on volumes 7 through 13 of Kazuma Kamachi's original light novel series published by , expanding on the science-versus-magic conflicts introduced in the prior season. Early planning emphasized integrating the series' deepening lore while accommodating potential new audiences, with for key arcs like the and Academy City Invasion developed shortly after the announcement by summer 2010.

Writing and direction

The second season of A Certain Magical Index, titled A Certain Magical Index II, featured series composition by Masanao Akahoshi, who served as head writer and penned scripts for 13 episodes, including the majority of the season's arcs to ensure fidelity to the source material's pacing and narrative structure. Akahoshi's oversight extended to adapting light novel volumes 7 through 13, with the final episodes incorporating elements from the first side story volume (Toaru Majutsu no Index SS: Kazakiri Hyouka wa Saikai suru) to deepen character backstories, particularly for secondary figures like Shiage Hamazura. Hiroshi Nishikiori directed all 24 episodes, drawing on his prior experience with action-oriented to choreograph the season's magical confrontations and esper ability clashes. His direction emphasized dynamic, fantastical action sequences that heightened the intensity of battles between and , balancing explosive visuals with the series' underlying themes of conflict. The production style combined dialogue-driven scenes that echoed the light novels' expository tone—often static to convey complex world-building—with fluid, high-energy for esper powers and combat, creating a rhythmic contrast between introspection and spectacle. Episodes typically structured around escalating tensions within arcs, concluding on cliffhangers to propel viewer engagement across the season's multi-threaded plots.

Casting

The voice cast for the second season of A Certain Magical Index, titled Toaru Majutsu no Index II, primarily consisted of returning actors from the first season to maintain continuity in the main characters' portrayals. Atsushi Abe reprised his role as the protagonist Touma Kamijō, returned as , and continued voicing . These actors were selected to reprise their roles based on their established performances in the initial season, ensuring familiarity for returning viewers. Several new characters were introduced in season 2, necessitating additional casting. was cast as Orsola Aquinas, a key figure in the and Daihaseisai arcs, bringing her experience in dramatic roles to the ensemble. expanded his portrayal of , transitioning from a supporting in season 1 to a more prominent character with deeper development. Other notable new hires included as Itsuwa and as Acqua of the Back, selected to fit the series' mix of and magical elements. The Japanese production, overseen by the Toaru Majutsu no Index Production Committee, handled the voice through established industry practices, focusing on actors from reputable agencies to align with the narrative's ensemble dynamics. In contrast, the English dub was produced separately by Entertainment, with voicing Touma Kamijō across both seasons. Funimation announced the dub cast for season 2's new characters, including Alex Moore as Agnese Sanctis, in July 2014 prior to its North American release.

Music and sound design

The music for A Certain Magical Index season 2, known as Toaru Majutsu no Index II, was primarily composed by Maiko Iuchi, who crafted over 40 tracks across two original soundtrack albums to underscore the series' blend of magical and scientific elements. The first OST, released on January 26, 2011, contains 23 tracks, while the second, released on May 25, 2011, also features 23 tracks, both published by Geneon Universal Entertainment. Iuchi's score emphasizes orchestral arrangements for magical themes, evoking tension and grandeur in sequences involving spells and grimoires, contrasted with electronic synth elements to represent the high-tech esper abilities and urban sci-fi atmosphere of Academy City. The season employs two opening themes and two ending themes to align with its narrative arcs. The first opening, "No buts!" by , plays from episodes 1 to 16, featuring energetic rock instrumentation composed by Tomoyuki Nakazawa with by Ozaki. Starting from episode 17, the second opening shifts to "See visionS," also performed by Kawada, which introduces a more introspective tone with layered vocals and driving beats, again composed by Nakazawa and arranged by Ozaki. For the endings, "Magic∞world" by serves as the first, used in episodes 1 to 13, with lyrics by Kurosaki, music by Iuchi, and a mystical pop that highlights the series' intrigue. The second ending, "Memories Last" from episodes 14 to 24, is performed by Kurosaki with lyrics by herself, music and by Nakazawa and Ozaki, delivering a reflective that complements the season's emotional depth. Sound design in the season enhances the action and supernatural confrontations through custom audio effects, particularly for key abilities like Imagine Breaker, Touma Kamijou's power that negates supernatural phenomena with a distinctive high-pitched, shattering sound effect to convey disruption and impact. Layered audio techniques, including synthesized clashes and ambient echoes, were employed for immersive depictions of magical activations and battles, amplifying the tension between science and without overpowering the orchestral score.

Promotion

Marketing campaigns

The marketing campaigns for the second season of began in mid-2010, ahead of its , with a focus on building excitement through multimedia promotions tied to the series. Multiple promotional videos (PVs) were released starting from 2010, featuring glimpses of new story arcs such as the Orsola Aquinas arc and Tree Diagram arc, alongside returning characters like Touma Kamijou and . These PVs, including an early teaser in late and a more detailed one in September, were aired during previews on AT-X and shared online via platforms like Nico Nico Douga and to engage existing fans. Advertisements extended to television commercials broadcast on networks including , , and AT-X, which highlighted the season's blend of and elements from the source material. Print ads were prominently featured in Dengeki Magazine and other publications, often showcasing key artwork and emphasizing the adaptation's fidelity to volumes 7 through 13 of the light novels, with calls to action for viewers to catch up on . Online campaigns kicked off with updates to the official anime website, including new character biographies, teaser illustrations by series designer Kiyotaka Haimura, and interactive elements like countdown timers to the premiere. These digital efforts were designed to foster community discussion on forums and social platforms. All promotional activities were coordinated by , the publisher of the Dengeki Bunko light novels, aiming to reach core and enthusiasts through integrated cross-media strategies that leveraged the franchise's established fanbase.

Tie-ins and events

To promote A Certain Magical Index season 2, several tie-ins and events were organized to heighten fan anticipation ahead of its October 2010 premiere. A key event was the preview of the season's first episode at the Dengeki Bunko Autumn Festival 2010, held on September 26 at Akihabara UDX in Tokyo, where attendees could see a digest of the continuation of the story arcs involving magic and science conflicts. Merchandise releases included drama CDs released in conjunction with the season's home video volumes, such as Toaru Majutsu no Index II Archives 1, which featured audio dramas expanding on key arcs like the Orsola Aquinas rescue and the Roman Catholic Church intrigue, voiced by the main cast including Yuka Iguchi as Index. These CDs, distributed by Geneon Universal Entertainment starting in May 2011, provided supplementary narratives tied to episodes 1-6. Similar volumes, Archives 2 and Archives 3, covered later arcs with additional character interactions. Fan outreach efforts extended to online platforms, where promotional contests allowed participants to win episode previews and merchandise through Dengeki's digital channels and partner sites. Collaborations included special reprints of volumes 7-13 with anime-style illustrations integrated into covers and interiors, aimed at bridging the source material with the adaptation. Crossover promotions appeared in Magazine, featuring joint artwork with series like Maid Sama! to cross-pollinate audiences. The season also saw initial international promotion through streaming on platforms like Nico Nico Douga for global access starting in 2010.

Release

Broadcast schedule

The second season of A Certain Magical Index, titled A Certain Magical Index II, premiered in Japan on October 8, 2010, and aired weekly on Fridays at 23:30 JST on AT-X. The series was simulcast on multiple networks shortly after, including Tokyo MX on the premiere date, followed by Chiba Television, Television Kanagawa, and Television Saitama Co., Ltd. on October 9, Mainichi Broadcasting System on October 9, and Chubu-Nippon Broadcasting Co., Ltd. on October 13. Comprising 24 episodes, the broadcast maintained a consistent weekly cadence without interruptions or delays, concluding on April 1, 2011. It was also streamed simultaneously on Nico Nico Douga during its run.) Internationally, Funimation Entertainment acquired the license for , producing an English dub announced in July 2014 with a release later that year. The series became available for streaming on platforms such as , where it offers subtitles, and has appeared on services like in select regions.

Home media releases

In , Geneon Universal Entertainment released the second season of , titled Toaru Majutsu no Index II, on Blu-ray in eight limited first-press edition volumes from January 26, 2011, to September 22, 2011, with each volume containing three episodes for a total of 24 episodes across the set. The corresponding DVD volumes followed a similar release schedule, also handled by Geneon Universal, spanning the same period in 2011. A Blu-ray box set compilation was later issued on October 25, 2017, compiling all episodes into a single digipack edition. Internationally, Entertainment licensed the season for North American distribution, releasing it in two Blu-ray/DVD combo parts: Part 1 (episodes 1–12) on October 28, 2014, and Part 2 (episodes 13–24) on December 16, 2014. A complete collection Blu-ray/DVD followed on August 21, 2017, bundling both parts with English and . Digital availability includes streaming on through the add-on channel, with episodes added or updated for accessibility by 2023. On , the season is available with audio and English , but an English dub remains unavailable as of 2024, with no confirmed plans for addition. Special features across the Funimation releases include audio commentaries by English voice actors for select episodes (such as episodes 2, 7, 14, and 22), textless opening and ending themes ("No buts!" and "See visionS" for openings; "Magic∞world" and "Memories Last" for endings), U.S. promotional trailers, and additional trailers. The Japanese volumes featured limited-edition bonuses like original mini-novels and artwork, but no integrated original soundtrack samples or cast interviews were standard; separate OST albums were released concurrently by Geneon. No box set re-release including an exclusive artbook occurred in 2015, and no major physical re-releases have been announced for 2024 or 2025. Sales for the Japanese Blu-ray volumes were modest but consistent, with the final volume (Vol. 8) selling 10,218 units in its first week according to rankings, and several earlier volumes exceeding 10,000 units in initial weeks, reflecting steady demand among fans.
VolumeRelease DateFirst-Week Sales (Blu-ray, )
1January 26, 2011~12,000 (estimated from rankings)
8September 22, 201110,218

Reception

Critical response

Anime News Network's review of the complete Blu-ray collection awarded A Certain Magical Index II an overall grade of B−, commending the entertaining cast dynamics, engaging action sequences, and innovative magical and concepts that deepen the series' lore. The review highlighted the season's strengths in world-building, particularly the escalating conflicts between science-based and magic users, which provide a more interconnected narrative than the first season's standalone arcs. Esper battles, especially during the Daihaseisai Festival arc, were praised for their dynamic choreography and integration of character abilities, offering high-stakes action that advances the overarching plot. Critics noted several weaknesses, including an overreliance on lengthy exposition that slows momentum in dialogue-heavy episodes, leading to tedious and preachy sequences. Some arcs, such as the resolution involving the British Royal Fleet, felt rushed in adaptation from the source novels, resulting in abrupt conclusions that undercut emotional payoff compared to the more deliberate pacing of season 1. Overall, while the season improves on narrative cohesion, it struggles with balancing exposition and action, making it less consistent than its predecessor in maintaining viewer engagement. Audience reception has been generally positive, with the series holding a 7.51/10 average score on based on over 259,000 user ratings as of 2025, reflecting appreciation for expanded character development and growth in supporting roles like Touma and . Users frequently cite the season's ability to weave personal stakes into larger conflicts as a highlight, though some express frustration with unresolved threads that carry over to later installments.

Accolades and awards

At the 5th held on March 5, 2011, received the Best Supporting Actor award for his performance as in A Certain Magical Index II, alongside his roles in Kaichō wa Maid-sama! and . The , established in 2006, recognize outstanding voice acting contributions in , and Okamoto's win highlighted his nuanced portrayal of the complex antagonist during the season's and Academy City Invasion arcs. While the season garnered positive industry attention, it did not secure additional major nominations or wins at events like the Festival. Legacy recognition remains centered on individual performances rather than production-wide honors, with no significant awards or retrospectives reported as of 2025.

References

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