The 2000s were a fascinating period for anime. It was an era caught between the hand-drawn aesthetics of the 1990s and the rapidly expanding digital production techniques that would define modern anime.
Everyone remembers Naruto, Bleach, Death Note, Fullmetal Alchemist and Code Geass. But behind those massive franchises were dozens of ambitious series that experimented with science fiction, horror, fantasy and unconventional storytelling.
Some developed small cult followings. Others quietly disappeared as DVDs went out of print and streaming platforms moved on to newer shows.
Here are 20 forgotten anime from the 2000s that deserve another look.
1. Texhnolyze (2003)
Dark, slow and relentlessly atmospheric, Texhnolyze takes place in the underground city of Lux, where rival factions fight for control while humans increasingly replace parts of their bodies with advanced cybernetic technology.
The series offers very little exposition, particularly during its opening episodes. Instead, it relies on imagery, silence and environmental storytelling to construct its bleak world.
If you enjoyed the philosophical side of Serial Experiments Lain or the cyberpunk atmosphere of Ghost in the Shell, Texhnolyze deserves your attention.
2. Ergo Proxy (2006)
Ergo Proxy combines cyberpunk, mystery, philosophy and post-apocalyptic science fiction into one of the decade's most unusual anime series.
Humanity survives inside sealed dome cities alongside androids known as AutoReivs. When a mysterious virus begins giving the machines self-awareness, investigator Re-l Mayer discovers a conspiracy involving strange beings called Proxies.
Its dense narrative will not appeal to everyone, but viewers willing to engage with its questions about identity, consciousness and humanity will find plenty to explore.
3. Wolf's Rain (2003)
In a dying world where wolves are believed to have become extinct, a small group of wolves hides among humans while searching for a legendary place called Paradise.
Wolf's Rain mixes fantasy, melancholy and post-apocalyptic imagery with an unforgettable soundtrack by Yoko Kanno.
Despite being highly regarded when it originally aired, the series is discussed far less frequently today than many of its contemporaries.
4. Last Exile (2003)
Airships, enormous battleships and retro-futuristic technology define the world of Last Exile.
The story follows young pilots Claus Valca and Lavie Head as a seemingly simple delivery mission pulls them into a massive conflict between rival nations.
Its combination of steampunk-inspired machinery, aerial combat and political intrigue gave Last Exile a distinctive identity that still looks impressive more than two decades later.
5. Haibane Renmei (2002)
A girl awakens from a strange dream and emerges from a cocoon with no memories of her previous life. Soon she develops wings and joins a community of mysterious beings called Haibane.
That premise might suggest fantasy adventure, but Haibane Renmei is something much quieter.
The series explores guilt, belonging, death and redemption through subtle character interactions and an intentionally mysterious world. It remains one of the most thoughtful anime of the early 2000s.
6. Gungrave (2003)
At first glance, Gungrave appears to be an exaggerated supernatural action anime based on a video game. Beneath the gunfights, however, is a surprisingly tragic crime story.
The series follows Brandon Heat and Harry MacDowell as they rise through the ranks of a criminal organization. Their friendship, ambition and eventual betrayal form the emotional core of the story.
Fans of gangster movies and tragic character-driven anime should not overlook this one.
7. RahXephon (2002)
RahXephon is frequently compared to Neon Genesis Evangelion because both involve teenagers piloting mysterious giant machines while reality itself becomes increasingly complicated.
But reducing it to an Evangelion imitation misses what makes the series interesting.
Music, time, memory and relationships play central roles in its story, while the mysterious RahXephon itself is unlike a conventional mechanical robot.
8. Witch Hunter Robin (2002)
Robin Sena is a young craft user working for an organization responsible for hunting dangerous witches.
Initially structured around individual investigations, Witch Hunter Robin gradually develops into a larger conspiracy involving the organization Robin works for and the true nature of witches.
Its muted colors, gothic atmosphere and deliberately slow pacing give it a style that feels distinctly early-2000s.
9. Fantastic Children (2004)
Every few decades, a mysterious group of white-haired children appears somewhere in the world. They never seem to age normally, and they have been searching for something for centuries.
Fantastic Children begins as an unusual mystery before expanding into a surprisingly ambitious science-fiction story involving reincarnation, lost memories and distant worlds.
Its unconventional visual style may initially seem simple, but the storytelling becomes considerably more complex as the mystery unfolds.
10. Gankutsuou: The Count of Monte Cristo (2004)
Alexandre Dumas' classic novel receives one of the strangest anime adaptations imaginable in Gankutsuou.
Rather than nineteenth-century France, the story unfolds in a futuristic civilization filled with spacecraft, advanced technology and aristocratic excess.
Its extraordinary visual technique, with elaborate textures moving independently beneath characters' clothing, makes it instantly recognizable. The result is a stylish science-fiction reinterpretation of revenge, betrayal and obsession.
11. Ghost Hound (2007)
From Production I.G and concept creator Masamune Shirow, Ghost Hound explores supernatural phenomena through psychology and neuroscience.
Three boys living in a rural town begin experiencing strange out-of-body events connected to traumatic incidents from their past.
Instead of relying on conventional horror, the series builds tension through unsettling sound design, psychological concepts and the uncertainty surrounding what the characters are experiencing.
12. Noein: To Your Other Self (2005)
Parallel universes collide when a mysterious group of warriors arrives looking for a girl named Haruka.
Noein combines quantum-inspired science fiction with an emotional story about childhood friendships and alternate futures.
The animation can shift dramatically between episodes and scenes, particularly during battles, giving the show an experimental quality rarely seen in mainstream television anime.
13. Bokurano (2007)
A group of children discovers what appears to be a harmless game in which they will pilot a giant robot to defend Earth.
There is just one horrifying condition.
Every time the robot fights, the life of its pilot is consumed.
Bokurano uses the giant-robot genre to explore mortality, responsibility, family and how young people react when confronted with the certainty of death.
14. Kemonozume (2006)
Before Devilman Crybaby brought Masaaki Yuasa's distinctive style to a huge international audience, he directed the bizarre and violent Kemonozume.
The series revolves around flesh-eating monsters and a family trained to hunt them, complicated by a forbidden romance between hunter Toshihiko and monster Yuka.
Its rough animation, wild movement and unconventional character designs make it look unlike almost anything else released during the decade.
15. Dennou Coil (2007)
Years before augmented reality became part of everyday technological discussion, Dennou Coil imagined children living in a city where digital information is constantly layered over the physical world through special glasses.
What begins as playful exploration gradually reveals abandoned virtual spaces, mysterious digital entities and unsettling consequences hidden within the technology.
Its depiction of augmented reality feels surprisingly relevant today.
16. Black Cat (2005)
Train Heartnet was once an elite assassin known as Black Cat. After abandoning the organization that controlled him, he attempts to build a new life as a bounty hunter.
The series mixes gunfights, superhuman abilities, comedy and adventure with Train's darker past.
While Black Cat never achieved the lasting popularity of the decade's biggest shonen franchises, it remains an entertaining snapshot of mid-2000s action anime.
17. The Twelve Kingdoms (2002)
Before modern isekai became one of anime's dominant genres, The Twelve Kingdoms demonstrated how ambitious a story about being transported to another world could be.
High-school student Youko Nakajima is suddenly taken to a fantasy world divided into twelve kingdoms, each governed by complex political and supernatural systems.
Rather than immediately becoming an unstoppable hero, Youko struggles with fear, betrayal and survival before gradually developing into a far stronger character.
18. Speed Grapher (2005)
Former war photographer Tatsumi Saiga discovers a secret underground club where Japan's wealthy elite indulge their darkest desires.
After encountering a mysterious girl named Kagura, Saiga gains the ability to make anything he photographs explode.
That bizarre premise becomes the foundation for a dark story about corruption, money, power and obsession. Speed Grapher is messy, violent and unmistakably a product of its era, which is precisely part of its appeal.
19. Kaiba (2008)
In the world of Kaiba, memories can be extracted from bodies, transferred between people and stored as information. Wealthy individuals can effectively escape death by purchasing new bodies, while the poor struggle to retain ownership of their own identities.
Its colorful, almost childlike character designs hide an unexpectedly mature exploration of memory, inequality, love and what makes someone the same person over time.
Directed by Masaaki Yuasa, Kaiba remains one of the most visually distinctive science-fiction anime of the 2000s.
20. Casshern Sins (2008)
In a ruined world inhabited largely by robots, Casshern awakens with almost no memory of who he is or why civilization is collapsing.
Robots believe consuming his body may grant them immortality, forcing Casshern into an endless journey through a dying landscape.
Casshern Sins transforms the classic Casshan franchise into a melancholic meditation on mortality, immortality and the value of life.
Why Are So Many 2000s Anime Being Forgotten?
The 2000s occupy a strange position in anime history.
Series from the 1980s and 1990s are increasingly celebrated as classics, while shows from the 2010s remain easily accessible through modern streaming platforms and active online communities. Many titles released between those periods have been left somewhere in the middle.
Licenses expired. DVDs disappeared from stores. Streaming catalogs changed. Some series never received major re-releases, while others were overshadowed by enormously successful franchises such as Naruto, Bleach, One Piece and Death Note.
The decade was also a transitional period for Japanese animation. Studios were moving from traditional cel production toward increasingly digital workflows, resulting in a visual identity that can be immediately recognizable today.
The 2000s Deserve Another Look
Looking back at the decade reveals how experimental anime could be outside its biggest commercial franchises.
Texhnolyze explored transhumanism. Haibane Renmei tackled guilt and redemption. Dennou Coil imagined an augmented-reality society. Bokurano transformed giant robots into an exploration of mortality, while Kaiba questioned whether our bodies or memories define who we are.
These anime may not dominate today's conversations, but that does not make them obsolete.
For anyone interested in discovering something beyond the usual recommendations, the forgotten anime of the 2000s offer an enormous library of strange, ambitious and sometimes brilliant stories waiting to be rediscovered.
How many of these 2000s anime have you watched? And which forgotten series would you add to the list?