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Terra Formars

Terra Formars is a Japanese series written by Yu Sasuga and illustrated by Kenichi Tachibana, focusing on humanity's disastrous attempts to Mars in the 26th century amid severe on . In the story, scientists seed Mars with to aid terraforming, but these insects evolve over centuries into highly intelligent, humanoid monsters called Terraformars, leading to the failure of early manned missions. To combat this threat and seek a cure for the deadly A.E. ravaging —believed to be linked to cockroach —U-NASA dispatches teams of criminals surgically enhanced with animal DNA, granting them abilities for brutal survival battles against the Terraformars. The series began serialization in Shueisha's Miracle Jump magazine on January 13, 2011, before transferring to on April 26, 2012, and ran irregularly until December 2018, compiling into 22 volumes before entering an indefinite hiatus due to Sasuga's health issues. It resumed in April 2024, leading to the release of a 23rd volume in July 2024, before entering another hiatus on April 10, 2025. As of November 2025, the series remains on hiatus, with announcements indicating plans to resume before the end of the year. In , licensed the series for English release starting in 2014 under their VIZ Signature imprint. Terra Formars has spawned several adaptations, including two television series produced by — the first in 2014 and Terra Formars: Revenge in 2016—along with an in 2018. A live-action film directed by was released in 2016, featuring practical effects for the grotesque Terraformars. The franchise is noted for its graphic violence, elements, and exploration of and survival in extreme environments.

Overview

Premise

In the late , humanity launched an international project to make Mars habitable amid Earth's escalating crisis. Scientists released genetically engineered to produce oxygen and thicken the atmosphere, accompanied by tasked with consuming the moss, fertilizing the , and accelerating the ecosystem's development. This initiative aimed to transform the barren planet into a viable for human expansion over the following centuries. Unforeseen by the project team, the underwent rapid into intelligent, creatures dubbed Terraformars, triggered by prolonged exposure to the and their inherent genetic resilience. These beings developed bipedal forms resembling muscular humans with cockroach features, exhibiting exceptional strength, speed, regenerative abilities, and coordinated social structures that far surpassed typical behavior. The accidental transformation turned Mars from a prospective haven into a deadly battleground, where the Terraformars aggressively defend their territory against intruders. To confront this existential threat and obtain biological samples from the Terraformars to develop a cure for the —a deadly ravaging believed to be linked to biology—world governments established a covert genetic enhancement program, modifying human participants with -derived DNA to bolster their combat capabilities. These enhancements confer , agility, and specialized traits—such as venomous stings or armored exoskeletons—directly tied to the chosen model, enabling expedition teams to engage the Terraformars on more during high-stakes missions to the red planet. The title Terra Formars derives from "," referencing the planetary alteration project, combined with "," the Latin term for , applied ironically to the evolved antagonists that exhibit ant-like societal organization.

Setting

In the late 26th century, grapples with extreme and dwindling resources, conditions that have pushed to the brink and necessitated aggressive expansion into space. To address this crisis, the Aeronautics and Space Agency (U-NASA) was established in the to coordinate global efforts in planetary . The agency's primary initiative involves Mars as a viable new home for billions, a project rooted in the need to alleviate 's unsustainable population pressures. Over five centuries of have transformed Mars into a more habitable world, featuring an oxygen-rich atmosphere generated through the strategic seeding of and , which helped warm the planet and facilitate atmospheric changes. The planet's reduced , approximately % of Earth's, aids mobility but poses unique challenges for . Vast underground hives serve as the primary habitats for the evolved , now known as Terraformars, while scattered human outposts, including the central U-NASA base, provide footholds for ongoing operations and research. Key technological advancements underpin these endeavors, including interstellar travel aboard massive vessels like the Annex I and Annex II ships, designed for transporting crews and equipment to Mars. The M.O. Operation, or Mosaic Organ Operation, enables human enhancements by integrating insect DNA to boost physical capabilities and resilience in the Martian environment, with a survival rate of about 36%. Efforts to counter the Terraformars include experimental viruses aimed at altering cockroach physiology to induce cephalization and reduce their threat level. The narrative timeline commences in 2577 with the first manned mission to Mars, incorporating flashbacks to the 21st-century origins of the terraforming project.

Characters

Human characters

The human characters in Terra Formars consist of U-NASA operatives, scientists, and civilians involved in the colonization and defense efforts on Mars, many of whom undergo the M.O. Operation—a genetic modification procedure that integrates animal DNA to bestow insect- or crustacean-inspired abilities for survival against environmental and biological threats. These enhancements are nationality-specific in later missions, reflecting diverse team compositions from Japan, the United States, Europe, and Asia, with over 50 named individuals grouped into squads like the First Platoon and Annex I teams. The high mortality rate among these characters, particularly in initial expeditions where many perish early, underscores the perilous stakes of the interplanetary conflict. Shōkichi Komachi serves as the central protagonist, a former Japanese delinquent haunted by a deep-seated phobia of cockroaches stemming from a traumatic childhood incident. Recruited for his street-hardened toughness and adaptability, Komachi receives M.O. enhancements derived from the Japanese giant hornet, granting him stinger attacks, venom injection, and enhanced strength and speed. His reluctant heroism drives much of the narrative, evolving from fear-driven avoidance to determined leadership within the First Platoon. Key team members in Komachi's squad include Ichirō Hiruma, the leader enhanced with traits from the sleeping chironomid midge larvae, providing for revival and regeneration after dehydration, making him a tactical frontline commander despite his stern demeanor. Michelle K. , an American operative, possesses blast ant-based abilities that enable her to cause internal explosions in foes via stings. Akari Hizamaru contributes with silk moth enhancements, allowing him to produce durable threads for web-based traps, mobility, and restraint tactics, complementing the team's close-combat specialists. Supporting cast expands beyond the core squad to include U-NASA administrators like the enigmatic North American officials overseeing , family members such as Komachi's who motivate personal stakes, and rivals in subsequent arcs—exemplified by characters enhanced with traits for immense lifting power and armored resilience. These figures highlight themes of global cooperation and individual sacrifice, with squad dynamics often strained by cultural differences and the irreversible toll of genetic alterations.

Terraformars

The Terraformars are the central antagonistic species in Terra Formars, consisting of evolved, humanoid that have become the dominant lifeform on Mars. Originating from cockroaches dispatched to the planet in the (circa 2077) as part of humanity's initial efforts, these insects were intended to decompose like and to facilitate atmospheric changes. By the year 2599, their population had exploded to exceed billions, driven by rapid reproduction and adaptation to the Martian environment. This unchecked growth transformed them into highly intelligent beings whose cognitive abilities rival those of humans, enabling coordinated strategies and technological mimicry despite their inability to speak. Physically, Terraformars possess a humanoid body structure derived from cockroach morphology, standing roughly human-sized with enhanced musculature that grants superhuman speed, strength, and durability. Their exoskeletons provide natural armor, while appendages allow for powerful strikes capable of dismembering opponents. Adaptive biology enables them to evolve mid-combat, incorporating traits from defeated foes or environmental factors to counter threats, such as developing resistance to human weapons or toxins. Standard Terraformars function as foot soldiers, exhibiting relentless aggression and pack hunting tactics. They lack verbal communication but convey intent through pheromones and gestures, fostering a hive-mind efficiency in battles against human incursions. Terraformar society mirrors a militarized , organized around a strict that emphasizes collective survival and expansion. At the apex is the Roach God, a supreme leader that directs overarching strategies from pyramid-like strongholds on Mars. Subordinate ranks include elite guards and specialized evolved forms, which may integrate organic weapons—such as blade-like limbs or projectile glands—or chitinous armor for defensive roles. This evolved from basic instincts but has advanced to emulate organizational models, including division of labor for , , and . is accelerated through exposure to engineered viruses, allowing rapid genetic assimilation of beneficial traits from consumed , which has propelled their dominance over the . In conflicts with humans, this adaptability manifests as tactical ambushes and resource denial, underscoring their role as formidable invaders.

Production

Creation and serialization

Terra Formars is a Japanese manga series written by Yū Sasuga and illustrated by Kenichi Tachibana. The series began serialization in the January 13, 2011, issue of Shueisha's Miracle Jump magazine, running until the December 13, 2011, issue. Following the magazine's discontinuation, it transferred to Weekly Young Jump starting with the April 26, 2012, issue. The manga has faced multiple hiatuses throughout its run, primarily due to health issues affecting writer Yū Sasuga. It entered a hiatus after the March 2, 2017, issue, resuming in April 2018, before pausing indefinitely in December 2018 after the release of its 22nd volume, which included over 200 chapters at that point. Serialization resumed on April 4, 2024, in Weekly Young Jump following a five-year break, but entered another hiatus on April 10, 2025, with a planned return by the end of 2025. As of late 2025, the series remains ongoing, with 23 tankōbon volumes published.

Art style and influences

The artwork in Terra Formars, provided by Kenichi Tachibana, is distinguished by its highly detailed and illustrations that vividly portray extreme violence and intricate anatomical structures, especially in the cockroach antagonists known as Terraformars. These designs meticulously render , such as segmented exoskeletons and compound eyes, blended with anthropomorphic forms to create a visceral sense of and during brutal scenes. Tachibana's employs dynamic layouts to convey in action sequences, where motifs dominate to heighten the tension of human-insect confrontations. The series draws stylistic influences from science fiction classics like , mirroring its core concept of interstellar warfare against evolved insectoid enemies, which informs the manga's premise of cockroach evolution on Mars. Additionally, elements of horror manga are evident in the emphasis on body horror and gore, amplifying the terror through exaggerated depictions of mutilation and mutation. Tachibana and writer Yu Sasuga incorporate real entomology for authenticity, basing Terraformar adaptations on actual cockroach biology, such as their resilience and sensory adaptations, researched through libraries and expert sources to ground the fantastical elements. Sasuga's fuses traditional shōnen tropes with pseudo-scientific rationales for character abilities, derived from traits, while underscoring themes as under-equipped humans face overwhelming odds. This approach creates a rhythm of intense fights interspersed with explanatory asides on and strategy. The evolves alongside the storyline, depicting characters with progressively -worn designs that reflect their growth and injuries, and color pages in the original serialization intensify the gore, using vivid reds and shadows to make violent moments more striking.

Media adaptations

Manga

The manga Terra Formars, written by Yū Sasuga and illustrated by Kenichi Tachibana, began serialization in the inaugural issue of Shueisha's seinen anthology magazine Miracle Jump on January 11, 2011. Following the magazine's discontinuation after its December 2011 issue, the series transferred to Shueisha's Weekly Young Jump starting with issue 22-23 on April 26, 2012, a move prompted by its rapid rise in popularity among readers. Serialization proceeded irregularly thereafter, with a major hiatus from December 2018 to April 2024 due to Sasuga's health concerns, a brief resumption in Weekly Young Jump that April, and another hiatus beginning April 2025, with a planned return later in 2025. As of November 2025, the main series comprises 23 tankōbon volumes published by Shueisha, collecting over 220 chapters divided into major story arcs including the Annex 1 arc (chapters 1–32), the U-NASA Earth arc (chapters 33–84), and the Annex 2 arc (chapters 85–ongoing). The series has been released in digital formats through Shueisha's platforms and Viz Media's apps, alongside standard tankōbon editions. In North America, Viz Media licensed the manga for English release, debuting the first volume on July 15, 2014, with subsequent volumes following a quarterly schedule; the 23rd volume is slated for November 18, 2025. By 2019, the manga had sold over 20 million copies in circulation in Japan, reflecting its commercial success during the peak serialization period, with cumulative print runs reaching 10 million copies by February 2015 alone. The franchise has spawned multiple spin-off manga, expanding on side stories and characters outside the main narrative. Notable examples include Terra Formars Gaiden: Asimov (2015), written by Kenichi Fujiwara and illustrated by Boichi, which focuses on the backstory of Sylvester Asimov and ran for five chapters in Shueisha's Grand Jump from November 2015 to March 2016. Another is Terra Formars Gaiden: Rain Hard (2014–2015), illustrated by Satoshi Kimura, detailing Adolf Reinhard's origins across five chapters in Shueisha's Ultra Jump from October 2014 to February 2015. Additional spin-offs encompass gag comedies like Terraho-kun (2016) in Weekly Young Jump and action-oriented side stories such as Terrafo Police (2014), reimagining elements of the core premise in police procedural formats on Shueisha's Tonari no Young Jump website.

Anime

An adaptation of Terra Formars was produced by , with the first (OVA) released in 2014 to cover the preceding Bugs 2 arc from the . This two-episode OVA, directed by Hiroshi Hamasaki with series composition by Shogo Yasukawa, served as a to the main series and introduced key elements of the story's , including the initial failed . The primary television adaptation consists of two seasons. The first season aired from September 26 to December 19, 2014, comprising 13 episodes that adapt the Annex 1 arc, focusing on the U.N.'s to combat the Terraformars and develop a for the A.E. virus. Directed by Hamasaki, with music composed by Shūsei Murai, the season was produced by and emphasized intense action sequences and the manga's gore elements while streamlining some narrative details for pacing. Notable voice actors include as Shōkichi Komachi, as Michelle K. Davis, and as Marcos E. Garcia. The second season, titled Terra Formars: Revenge, aired from April 1 to June 24, 2016, also spanning 13 episodes and continuing the adaptation into the Annex 2 arc, where survivors from the previous mission join a new expedition. Directed by Michio Fukuda, with series composition by and music by Takafumi Wada, this season was a collaboration between and Animations. It retained the core plot from the but incorporated some original scenes and adjustments to enhance dramatic tension and episode flow, diverging slightly in character development and battle resolutions to fit the runtime. The returning voice cast was joined by additional performers, such as for new roles, maintaining continuity in performances. In , a two-episode OVA titled Terra Formars: Earth Arc (also known as OVA) was released, bundled with the manga's 21st and 22nd volumes from August 17 to November 19. Produced by , it adapts the arc where Terraformars reach , featuring returning voice actors and focusing on the ensuing battles. Both seasons premiered on and other Japanese networks, with simulcast streaming available on for international audiences, allowing near-real-time access outside . The anime's visual style highlighted the manga's dynamic fight choreography and grotesque designs, though it toned down some explicit violence for broadcast standards compared to the source material.

Live-action film

Terra Formars is a 2016 Japanese live-action directed by , adapting the early arcs of the series by Yū Sasuga and Kenichi Tachibana. The film was released in Japan on April 29, 2016, by Warner Bros. Japan, with a runtime of 109 minutes. It stars as Shokichi Komachi, as Nanao Akita, as Micott, and as Yasuhiro, alongside supporting roles by , , and . The screenplay was written by , known for his work on Miike's previous films. The plot centers on a 26th-century , where humanity has attempted to the planet using and , only for the s to evolve into intelligent, Terraformars. A team of recruits, including criminals and volunteers, undergoes genetic modifications based on insect abilities to combat the creatures during the U-NASA 1 expedition. The condenses the manga's initial Annex missions into a single narrative, emphasizing high-stakes action sequences and the team's survival struggles while streamlining character backstories for cinematic pacing. Unlike the source material's episodic structure, the film focuses on collective team dynamics over individual fights, resulting in a more streamlined but less expansive exploration of the lore. Production involved extensive visual effects, with heavy reliance on to depict the Terraformars' designs and the intense arts-inspired scenes. Filming took place in and , the latter providing Martian landscapes, and was handled by OLM Inc. for animation elements and Imagica for post-production. The effects team aimed to capture the manga's grotesque insect-human hybrids, though some sequences blend practical stunts with digital enhancements for the transformation and battle visuals. The film received mixed reviews, with praise for its ambitious action choreography and faithful tone to the manga's over-the-top violence, but criticism for uneven CGI quality and simplistic plotting. On Rotten Tomatoes, it holds a 50% approval rating based on limited critic scores, noted for appealing to fans of genre sci-fi despite technical shortcomings. Commercially, it grossed $5.5 million at the Japanese box office, performing modestly for a manga adaptation.

Other media

The Terra Formars franchise has expanded into light novels that delve into side stories and character backstories beyond the main . The series "Terra Formars: Lost Mission," written by Akira Higashiyama and published by Shueisha's Dash X Bunko imprint, began in 2014 and consists of multiple volumes focusing on additional missions to Mars and the human crews' struggles against the Terraformars. Similarly, "Terra Formars: The Outer Mission," authored by Kenichi Fujiwara, launched in 2015 and explores outer expeditions, providing deeper insights into supporting characters' motivations and psychological depths not fully covered in the . These novels enhance the universe by emphasizing themes of and in isolation. In terms of , Terra Formars received an action-adventure title titled Terra Formars: Akaki Hoshi no Gekitou (Fierce Battle on the Crimson Planet), developed and published by Corporation for the , released on April 2, 2015, in . The game features playable characters from the series, such as Shokichi Komachi, engaging in melee combat against swarms of Terraformars on Mars, with mechanics centered on bug-hybrid abilities and mission-based progression. No major tie-ins were produced, though the franchise lacks significant Western-developed , limiting its primarily to platforms. A exists in the form of a dice-based published by Japanime Games in 2016, where players lead teams to exterminate cockroach-like foes on Mars using strategy cards and rolls. Additional media includes audio dramas bundled with the anime Blu-ray/DVD releases. The first original drama CD, featuring voice actors from the anime cast portraying pre-mission interactions among the crew, was included with the limited edition of Volume 1 on December 24, 2014. Subsequent volumes contained mini drama CDs up to Volume 6, expanding on interpersonal dynamics and tactical preparations. Merchandise for the series prominently includes collectible figures, such as the Terra Formar non-scale released by Max Factory in 2014, depicting the iconic antagonist with posable limbs for dynamic display. Good Smile Company produced figures of characters like Michelle K. Davis in 2016, emphasizing chibi-style designs with interchangeable faces and accessories to capture M.O. surgery transformations. These items, along with apparel and replicas, contribute to the franchise's appeal among collectors by highlighting its grotesque yet detailed creature designs.

Themes and analysis

Scientific elements

The Terra Formars series incorporates pseudo-scientific elements inspired by real and , particularly in its depiction of human enhancements and the evolutionary processes on Mars. The process begins with the introduction of to generate oxygen through , a grounded in proposals for biological atmospheric modification on Mars. Recent research has demonstrated that certain desert mosses, such as Syntrichia caninervis, can survive extreme conditions including high , , and low pressure, potentially aiding in oxygen production and on the Martian surface. are deployed to distribute the moss, leveraging their real-world adaptability; these exhibit remarkable resilience, capable of surviving doses up to 10,000 rads—10 times the approximate for humans (around 1,000 rads)—due to their slow rates, which reduce susceptibility to DNA damage from . In the , evolve into intelligent humanoid forms via a fictional cephalization virus that accelerates brain development, transforming their primitive nervous systems into advanced cognitive structures while altering Mars' through increased atmospheric oxygen and temperature from the moss proliferation. Human characters undergo "Bugs Surgery," a procedure integrating insect DNA to grant superhuman abilities, drawing directly from documented entomological traits for plausibility. For instance, enhancements mimicking the bullet ant (Paraponera clavata) confer immense strength and a venomous sting rated 4+ on the Schmidt sting pain index—the highest level—caused by poneratoxin, a neurotoxin that disrupts sodium channels in nerves, inducing prolonged, bone-deep agony lasting up to 24 hours. Similarly, abilities based on the praying mantis involve raptorial strikes reaching speeds of 60 milliseconds, enabled by specialized foreleg musculature and hydraulic mechanisms that allow explosive extension, as observed in high-speed analyses of mantis predation. These integrations emphasize conceptual fidelity to insect physiology, where ants lift up to 50 times their body weight via efficient muscle leverage, and mantises achieve precision through neural feedback loops, though the series extrapolates them to human scales without biological feasibility. Combat sequences on Mars exploit the planet's low (approximately 0.38 times 's), which alters physics by reducing and inertial forces, enabling combatants to achieve greater heights (up to 2.6 times higher than on ) and extended trajectories for attacks. However, this environment diminishes traction and maximum acceleration due to lower ground reaction forces, potentially slowing sprint speeds and complicating close-quarters maneuvers compared to -based fights; -inspired movements, scaled from real speeds of 1.5 m/s (equivalent to 50 body lengths per second), would appear even more agile in reduced , amplifying their threat in zero-atmosphere vacuums where persists longer. The narrative's appendices, often termed "bug files," detail such adaptations—like radiation tolerance—to bridge fictional enhancements with verifiable entomological data, underscoring the series' reliance on for its action-oriented pseudobiology.

Social commentary

The manga Terra Formars has been critiqued for its portrayal of through character abilities that draw on ethnic and national , often associating specific countries with particular powers, which has led to debates about underlying in the narrative. For instance, characters from different nations are granted abilities inspired by cultural tropes, such as for Chinese characters or for Japanese ones, reinforcing that some interpreters see as promoting a form of cultural . This approach has sparked discussions on how the series reflects or critiques , with the human teams organized by country, highlighting inter-national rivalries amid a common threat. The themes of and in Terra Formars emphasize , portraying humans as evolving in ways that mirror the ' brutality, suggesting a Darwinian struggle where humanity's instincts emerge under pressure. The ' into humanoid forms serves as a for humanity's own insect-like tendencies, such as swarming behavior and relentless aggression, blurring the line between predator and prey. This parallel underscores a commentary on , where human society devolves into base instincts during crises. Terraforming Mars in the story acts as a for human , illustrating environmental disregard through the of altering an alien ecosystem, leading to the ' uprising as a backlash against colonial overreach. The initial mission to seed Mars with and for oxygenation symbolizes humanity's arrogant assumption of dominance over , resulting in a hostile that punishes such overconfidence. This narrative arc critiques real-world environmental exploitation and ambitions as extensions of imperialistic mindsets.

Reception

Critical reviews

Critics have praised the for its dynamic fight sequences and detailed artwork, which effectively convey the intensity of battles against the known as Terraformars. The innovative concept of humans with insect-derived powers, such as enhanced strength or exoskeletons, has been highlighted as a fresh take on sci-fi action, blending horror elements with strategic combat. However, the series has faced for repetitive structures, where fights often follow similar patterns of reveals and sacrifices without significant variation. Characters are frequently described as underdeveloped, serving primarily as vehicles for rather than having meaningful arcs or emotional depth. Pacing issues become more pronounced in later arcs, with prolonged flashbacks and extended combat slowing the narrative momentum. The adaptation received commendation for its quality, particularly in depicting fluid and visceral fight that enhances the manga's action. users rated the first season an average of 6.5 out of 10, appreciating the mature visual style despite some inconsistencies. The 2016 live-action film, directed by , was lauded for its in rendering the Terraformars and environments, creating an immersive sci-fi atmosphere. Yet, it was faulted for its cheesy dialogue and over-the-top tone, which undermined the tension in otherwise ambitious action set pieces. In Western reviews, the series' heavy reliance on has elicited mixed responses, with some appreciating the unflinching brutality as integral to the theme, while others found it gratuitous and detracting from the plot. The earned a nomination for the 6th award in , recognizing its impact in the sci-fi genre.

Commercial success

The manga series has achieved significant commercial success, with over 22 million copies in circulation worldwide across its 23 volumes as of July 2024. Several volumes topped Japan's weekly manga charts, including volume 8, which sold 299,947 copies in its debut week in 2014. This strong print performance contributed to the franchise's overall market presence, though no major serialization updates occurred after the manga's indefinite hiatus in late 2018 until a brief resumption in 2024; digital sales have remained steady into 2025. The 2014 anime adaptation's first season saw modest physical media sales, with Blu-ray volumes averaging approximately 5,000 units per episode in . It gained broader accessibility through wide streaming distribution, including on , which helped expand its international audience. The 2016 live-action film grossed about 1 billion yen at the box office, equivalent to roughly , providing a moderate return despite not meeting expectations. Merchandise tied to the film and broader franchise, such as figures and apparel, further boosted overall revenue streams.

Controversies

The and adaptation of Terra Formars have faced significant criticism for perceived racist stereotypes in character designs and portrayals, particularly the depiction of the humanoid (Terraformars) with dark skin, exaggerated lips, and white eyes, which some reviewers likened to offensive caricatures of . Additionally, the multinational human cast often embodies national clichés, such as characters emphasizing and in exaggerated manners, contributing to accusations of cultural insensitivity across various ethnic groups, including characters portrayed as antagonistic with stereotypical traits tied to their origins. These elements drew backlash, especially in international audiences, with some online discussions in highlighting the series' negative representation of Chinese roles as fueling nationalism-themed concerns in the story. The series' graphic violence and gore have also sparked debates, as the content features brutal dismemberments, blood-soaked battles, and insect-human hybrid carnage, earning mature ratings like TV-MA . The 2014 anime adaptation underwent heavy for broadcast television, with black bars and obscuring wounds and fatalities, which critics and fans argued diminished the intended and made episodes visually distracting. Uncensored versions were later released on and streaming platforms like , but the initial alterations fueled discussions on whether such edits glorified or sanitized the brutality. Production issues have led to other controversies, primarily multiple hiatuses in the manga serialization due to writer Yū Sasuga's ongoing health problems, first noted in 2017 and extending indefinitely from 2019 until a brief return in 2024. The most recent pause began in April 2025, with initial plans for resumption in summer delayed to fall and further to later in 2025, as announced on November 6, 2025; this has frustrated fans and raised concerns about the series' completion amid creator . No major new controversies emerged in 2024 or 2025 beyond these production delays.

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