Mazinger Z: Infinity 2017

Animation

Action

Runtime

95 mins

Language

Japanese

Directed by

Junji Shimizu

Made by

Toei Animation

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Mazinger Z: Infinity Plot Summary

Read the complete plot summary and ending explained for Mazinger Z: Infinity (2017). From turning points to emotional moments, uncover what really happened and why it matters.

Ten years have passed since the war against Dr. Hell and his Mechanical Beasts, and a new era of peace has settled over the world, sustained by the widespread use of photonic energy. Koji Kabuto [Showtaro Morikubo] is now a distinguished scientist, following in the footsteps of his father and grandfather, and the arc of his career has grown alongside Sayaka Yumi [Ai Kayano], who leads the Photon Research Institute as its director while her father’s legacy continues to shape Japan—his tenure as Prime Minister having helped steer the nation through hard times. The world’s quiet stability is further supported by Great Mazinger’s pilot Tetsuya Tsurugi [Toshihiko Seki], who remains in the military, and by Jun Hono [Ai Koshimizu], his partner who is expecting their first child. Koji’s younger brother Shiro Kabuto [Natsuki Hanae] also serves as a military mecha pilot, keeping the family tradition alive in a landscape still edged with tension and possibility.

While a new building for the Photon Institute takes shape, the ground beneath Mt. Fuji yields a startling discovery: an enormous robot buried long ago, code-named Infinity. When Koji investigates, a girl emerges from the machine—Lisa [Sumire Uesaka]—the robot’s main control unit and a 91% organic AI capable of feeling, a beacon of both awe and danger. Just before this revelation, the world’s apparent safety is shattered as Dr. Hell [Unsho Ishizuka] resurfaces with a fresh wave of Mechanical Beasts, accompanied by Baron Ashura’s Female Side [Romi Park] and Count Brocken [Keiji Fujiwara]. In a devastating move, Hell steals Infinity, using a captured Tetsuya and Great Mazinger as an improvised activation key, leaving Lisa’s potential untapped and the technology poised on the knife-edge of catastrophe.

Lisa’s existence reveals Infinity’s ultimate intention: Goragon, a power that could exchange their universe with another by forcing a quantum overlap. Hell’s plan hinges on unleashing Goragon to erase this world because, in his view, it is not worth existing. The threat compels a race to adapt and respond, even as Dr. Nossori [Bin Shimada] and Dr. Sewashi [Kozo Shioya] bring a new tool into play—a giant photonic energy 3D Printer that can repair and upgrade the original Mazinger Z, long hidden at the old Photon Research Institute. With the refurbished Mazinger Z now under Koji’s command again, he and Lisa infiltrate the invaded Photon Institute, squaring off against the Mechanical Beasts inside, and pushing back against Hell’s forces.

The battle intensifies as Mazinger Z engages Hell’s robot, with the villains’ ranks bolstered by Baron Ashura’s Male Side and Count Brocken; the clash is fierce, and Mazinger Z sustains grave damage before Shiro Kabuto arrives to rescue Great Mazinger and help halt the Goragon countdown. Yet Hell retains one final edge: his Bardos scepter holds a backup activation key, allowing him to wrest control of Infinity and unleash Goragon anyway.

In a daring turn, Koji peers into an adjacent dimension where Lisa is part of a new family storyline—she is imagined as his and Sayaka’s daughter. Lisa uses herself as a key to grant Mazinger a power equal to Infinity’s by transmuting photonic energy into matter. The planet’s inhabitants unite, pooling their photonic energy into Mazinger Z, and Koji delivers a decisive blow that pushes Infinity off-planet, triggering a catastrophic explosion. Lisa disappears, but she leaves a hopeful message, promising they will see each other again.

In the wake of these events, Jun gives birth to Koji and Sayaka’s child, cementing a future that balances memory with renewal. The story closes on a quiet note of continuity: Koji and Sayaka marry, strolling forward with a child who carries the legacy of Lisa as part of a broader, shared family future.

Mazinger Z: Infinity Timeline

Follow the complete movie timeline of Mazinger Z: Infinity (2017) with every major event in chronological order. Great for understanding complex plots and story progression.

Peaceful era after the war

Ten years after the war against Dr. Hell and his Mechanical Beasts, the world enjoys peace powered by photonic energy. Koji Kabuto has become a distinguished scientist, Sayaka Yumi directs the Photon Research Institute, and Tetsuya Tsurugi remains a military pilot while Jun Hono is pregnant. Shiro Kabuto also serves as a military mecha pilot, signaling a stable and hopeful era.

Ten years after the war Earth

Infinity uncovered beneath Mt. Fuji

During the construction of the Photon Research Institute's new building, workers uncover an enormous robot buried beneath Mt. Fuji. Koji Kabuto investigates and a girl emerges from inside the robot. This girl, Lisa, is revealed to be the robot's main control unit, a 91% organic AI with real feelings.

During construction of the institute Mt. Fuji / Photon Research Institute construction site

Dr. Hell's attack and Lisa's revelation

Shortly after the discovery, Dr. Hell launches a brutal assault on the institute with new Mechanical Beasts and his henchmen, Baron Ashura and Count Brocken. He steals Infinity and uses captured Tetsuya and Great Mazinger as an activation key, unable to obtain Lisa. Lisa explains that Infinity's final power, Goragon, can cause a forced quantum overlap to swap universes, driving Dr. Hell's plan to annihilate this world.

Shortly after discovery Photon Research Institute

Upgrading Mazinger Z to confront the threat

Dr. Nossori and Dr. Sewashi employ a giant photonic energy 3D printer to repair and upgrade the original Mazinger Z, which had been hidden at the old Photon Research Institute. This prepares Koji to infiltrate the invader's stronghold with Lisa's help. The rebuilt Mazinger Z returns with renewed power to fight inside the Photon Institute.

Between the first attack and the infiltration Old Photon Research Institute / Photon Institute

Infiltration of the Photon Institute

Koji and Lisa pilot the refurbished Mazinger Z into the invaded Photon Institute to confront the Mechanical Beasts within. They navigate the facility’s corridors, leveraging Lisa's organic AI insights and Mazinger's renewed capabilities. Their objective is to disable Hell's control over Infinity and reclaim the activation key.

During the invasion Photon Institute interior

Showdown with Baron Ashura and Count Brocken

Inside the institute, Mazinger Z battles and defeats Baron Ashura and Count Brocken. The duel strains the hero's machine as they press toward stopping Dr. Hell's plan. With the henchmen fallen, Koji and Lisa advance toward Dr. Hell's robot to confront the mastermind.

During the infiltration Photon Institute interior

Goragon threat escalates

Mazinger Z confronts Dr. Hell's robot, but the fight leaves Mazinger Z gravely damaged. Shiro Kabuto arrives to rescue Great Mazinger, allowing a renewed strike against Infinity. They halt the Goragon countdown briefly, only for Dr. Hell to exploit a Bardos scepter containing Great Mazinger's activation code and trigger Goragon.

Climax of the infiltration Photon Institute / Infinity battlefield

Alternate dimension glimpse

In the adjacent dimension, Koji witnesses an alternate universe where Lisa is his and Sayaka's daughter. The vision reframes what is at stake and strengthens the resolve of the team. Lisa uses the moment to guide their path toward a hopeful future.

During Goragon activation Adjacent dimension

Lisa becomes the universal key

Lisa sacrifices herself as the key to Mazinger Z's power, transforming photonic energy into matter to mirror Infinity's power. The people of Earth contribute their photonic energy to Mazinger Z, empowering it to strike Infinity and push it off the planet. Koji delivers the final blow, expelling Infinity from the world and triggering its explosion.

Final battle Earth

Lisa's sacrifice and a hopeful reunion

With Infinity destroyed, Lisa vanishes but reassures Koji that they will meet again. The world returns to peace as the team mourns the loss and clings to the hope of future contact across dimensions. Koji and Sayaka reflect on love, science, and the promise of reunion beyond this life.

Immediately after the battle Earth

Birth of a new life

Jun Hono gives birth to Tetsuya's child, a personal milestone for the pilots who fought to protect the world. The event marks a renewal of life amid the era's restored peace. The tiny new life embodies the lasting legacy of all they endured.

Following the battle Japan

A new beginning: marriage and a child named Lisa

Koji and Sayaka marry, signaling a new chapter for the couple who led the defense of Earth. They are later seen walking with a child named Lisa, suggesting a hopeful future that blends science, love, and the memory of their friend. The ending frames peace, family, and the enduring bond between humans and technology.

After the battle Japan

Mazinger Z: Infinity Characters

Explore all characters from Mazinger Z: Infinity (2017). Get detailed profiles with their roles, arcs, and key relationships explained.

Koji Kabuto (Showtaro Morikubo)

Koji is a celebrated scientist and the revived pilot of Mazinger Z. He leads the fight against Dr. Hell by upgrading and piloting a refurbished Mazinger Z, leveraging Lisa’s power as a key to Infinity. His legacy as a fearless engineer anchors the team and he is willing to make personal sacrifices for peace.

🧠 Genius 🛡 Leader 🚀 Mecha pilot

Shiro Kabuto (Natsuki Hanae)

Shiro is Koji’s younger brother and a military mecha pilot. He demonstrates loyalty, courage, and quick thinking in the face of Dr. Hell’s Assault. His participation helps bridge the older generation’s experience with the newer era of peace.

🛡 Mecha pilot 🧭 Loyal 💪 Brave

Sayaka Yumi (Ai Kayano)

Sayaka Yumi becomes director of the Photon Research Institute, guiding photonic technology and policy in a peaceful Japan. Daughter of the former Prime Minister, she balances scientific leadership with personal commitments to Koji and the coming child. Her role anchors the scientific and political sides of the era.

👩‍🔬 Scientist 🤝 Leader 💖 Family focus

Lisa (Sumire Uesaka)

Lisa is the main control unit of Infinity, an AI with 91% organic composition and genuine feelings. She acts as a bridge between worlds, guiding the heroes and challenging Dr. Hell’s nihilism. Her presence drives the emotional core of the story as she becomes a catalyst for hope and, ultimately, sacrifice.

💗 AI with feelings 🧠 Organic intelligence 🌈 Bridge between worlds

Dr. Hell (Unsho Ishizuka)

Dr. Hell is the mastermind villain who seeks to use Goragon to swap universes, believing this world is not worth existing. He commands the Mechanical Beasts and the henchmen to seize Infinity and rewrite reality for his own nihilistic ends.

🧪 Villain 🗡 Mastermind

Baron Ashura's Male Side (Hiroyuki Miyasako)

The male side of Baron Ashura serves as one of Dr. Hell’s henchmen, deploying tactics and combat against the heroes. He embodies the brutish, calculating aspect of the duo’s threat.

👿 Henchman ⚔️ Villain

Baron Ashura's Female Side (Romi Park)

The female side of Baron Ashura accompanies the male counterpart in the villainous duo, contributing to Dr. Hell’s schemes with cunning and force. She adds a dynamic balance to the pair’s dynamic.

👿 Partner 🗡 Villain

Count Brocken (Keiji Fujiwara)

Count Brocken is a cunning ally of Dr. Hell, frequently using manipulation and strategy to outmaneuver the heroes. He coordinates attacks and keeps a cool, calculating edge to the assault on Photon Institute.

🗡 Strategist 🧭 Deceiver

Tetsuya Tsurugi (Toshihiko Seki)

Tetsuya Tsurugi is Great Mazinger’s pilot and Koji’s ally who remains in the military. He is married to Jun Hono and is involved in defending Earth as new threats emerge. He embodies resilience and martial prowess.

🛡 Mecha pilot 💕 Family man

Jun Hono (Ami Koshimizu)

Jun Hono is Tetsuya Tsurugi’s wife, now pregnant with their first child. She represents continuity and the future generation that the heroes strive to protect. Her arc links personal life with the ongoing battles.

👩‍👧 Family 💖 Hope

Dr. Nossori (Bin Shimada)

Dr. Nossori collaborates with Dr. Sewashi to repair and upgrade Mazinger Z using a giant photonic energy 3D printer. He embodies scientific ingenuity and the drive to restore technology in the face of disaster.

🧠 Scientist ⚙️ Inventor

Dr. Sewashi (Kozo Shioya)

Dr. Sewashi is a fellow scientist who helps upgrade Mazinger Z and supports the Photon Institute’s defense with innovative technology. He shares the proactive spirit of the era’s scientific community.

🧠 Scientist 🛠 Engineer

Mazinger Z: Infinity Settings

Learn where and when Mazinger Z: Infinity (2017) takes place. Explore the film’s settings, era, and how they shape the narrative.

Time period

Postwar near-future (ten years after the war with Dr. Hell)

A decade after the defeat of Dr. Hell, society is powered by photonic energy and vibrant scientific advancement. The Photon Institute becomes the focal point of peace-driven innovation, as Koji and Sayaka marshal new technologies to defend Earth. The discovery of Infinity introduces a cosmic-scale threat that tests humanity's resolve.

Location

Japan, Mount Fuji, Photon Research Institute

Set in a postwar Japan, the world enjoys peace thanks to photonic energy. While constructing the Photon Research Institute near Mount Fuji, engineers uncover an enormous robot buried beneath the mountain. The setting centers on high-tech labs, mech battles, and the effort to safeguard a fragile era of harmony.

🇯🇵 Japan 🔬 Sci-Fi ⚙️ Mecha 🕊 Peaceful era

Mazinger Z: Infinity Themes

Discover the main themes in Mazinger Z: Infinity (2017). Analyze the deeper meanings, emotional layers, and social commentary behind the film.

🌟

Hope

Lisa, a 91% organic AI housed inside Infinity, embodies a new kind of sentience that inspires faith in humanity’s future. Her presence reframes what technology can mean for people, not just machines. The team’s willingness to protect Lisa and the world shows how hope can emerge from even the most advanced inventions.

🤝

Family

The story centers on bonds that extend beyond bloodlines: Koji and Sayaka’s leadership and partnership, Jun Hono’s pregnancy, and Tetsuya Tsurugi’s marriage. Lisa’s integration into the family and lineage—across dimensions—adds emotional stakes to the mech saga. These relationships ground the high-stakes battles with warmth and loyalty.

🧭

Dimensions

Goragon’s power creates a bridge to another universe, revealing alternate possibilities where Lisa could be a daughter. The plot uses cross-dimensional stakes to question fate, choice, and identity. In the end, love and connection across dimensions guide the heroes toward a decisive, hopeful outcome.

⚖️

Power and Responsibility

Infinity’s Goragon power exposes the ethical limits of cosmically scaled technology. The protagonists must balance the temptation to reshape reality with the duty to protect countless lives. The narrative argues that mastery over immense power requires humility, collaboration, and sacrifice.

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Mazinger Z: Infinity Spoiler-Free Summary

Discover the spoiler-free summary of Mazinger Z: Infinity (2017). Get a concise overview without any spoilers.

In a world that has finally put the echoes of war behind it, humanity thrives on a new source of clean, photonic energy. Cities sparkle with the soft glow of this breakthrough, and the once‑dangerous battlefield of giant metal monsters has become a quiet museum of the past. Yet the sky still bears the silhouette of the legendary super‑robot, a reminder that the balance between peace and chaos can hinge on a single, towering presence.

At the heart of this fragile serenity stands Koji Kabuto, now a distinguished scientist whose curiosity still reaches for the stars, and Sayaka Yumi, the determined director of the Photon Research Institute, carrying forward the legacy of her famous father. Their lives intertwine with Tetsuya Tsurugi, a seasoned military pilot who balances duty with a budding family, and his supportive partner Jun Hono, who awaits the arrival of their first child. Shiro Kabuto, Koji’s younger brother, brings youthful vigor to the ranks of the new generation of pilots, keeping the spirit of adventure alive.

Beneath this calm, the legendary threat of Dr. Hell looms, a specter of the past who once sought to shatter the world with his mechanical beasts. Rumors of his return stir unease, and the very notion of re‑awakening the mighty Mazinger Z—the colossal iron guardian forged to protect humanity—begins to surface. The atmosphere crackles with a mix of nostalgic reverence and anticipatory tension, suggesting that the line between historic triumph and impending challenge may soon blur, calling the heroes to once again stand beneath the shadow of the mecha that defined an era.