The anime industry is full of surprises. Every season, new shows debut with varying levels of hype, but not all of them achieve long-lasting success. Some series start as overlooked underdogs, dismissed for their art style, premise, or lack of mainstream recognition. However, against all odds, they rise in popularity, proving that a strong story, lovable characters, and ionate fan can turn even the most unexpected series into major hits.

There are many anime series that began with little fanfare but defied expectations to become some of the most beloved and successful anime of all time. Whether through word-of-mouth, critical acclaim, or sheer storytelling brilliance, these underdog anime cemented themselves as must-watch classics.

10 Odd Taxi

Anime Series by OLM; Based on the Original Work by P.I.C.S. and Kadzuya Konomoto

When Odd Taxi first aired, it did not make a huge splash. The anime's simplistic, anthropomorphic animal character designs made it seem like an odd, niche series that would not attract a mainstream audience. However, as viewers dived deeper, they discovered a gripping mystery thriller that unraveled through compelling dialogue and shocking plot twists. The anime’s noir-like atmosphere and rich character development turned it into a cult classic.

With time, Odd Taxi gained recognition for its intelligent writing and unique premise. Fans praised its well-crafted story, which was packed with social commentary and interconnected mysteries that kept audiences hooked. What started as a seemingly obscure show became one of the most critically acclaimed anime in recent years.

9 Made in Abyss

Anime Series by Kinema Citrus; Based on the Manga by Akihito Tsukushi

At first glance, Made in Abyss appeared to be a cute and innocent adventure anime. Its vibrant art style and childlike character designs led many to assume it was a lighthearted show aimed at a younger audience. However, as the story progressed, viewers were met with a dark, emotional, and often disturbing story that explored themes of survival, sacrifice, and the unknown dangers of the Abyss.

The contrast between its seemingly whimsical aesthetics and its harrowing story captivated audiences.

The contrast between its seemingly whimsical aesthetics and its harrowing story captivated audiences, leading to an outpouring of praise. Made in Abyss quickly became a standout hit of its release year, proving that even the most unexpected series can have a deep emotional impact on viewers.

8 The Dangers in My Heart

Anime Series by Shin-Ei Animation; Based on the Manga by Norio Sakurai

Few people expected The Dangers in My Heart to become one of the best romance anime in recent years. The first episode felt awkward, with characters portrayed in a way that made many viewers cringe. However, those who stuck with it soon realized that beneath its odd beginning was a touching and beautifully written romance.

As the story progressed, The Dangers in My Heart developed into a heartwarming and emotionally deep series. The evolving relationship between the protagonists felt natural and very relatable, which resonated with audiences worldwide. The anime ultimately overcame its rough start to make itself a must-watch rom-com.

7 Cyberpunk: Edgerunners

Anime Series by Studio Trigger; Based on the Cyberpunk Universe by CD Projekt Red and Mike Pondsmith

Given the controversy surrounding Cyberpunk 2077, many doubted that an anime adaptation set in the same universe would make much of an impact. However, Cyberpunk: Edgerunners defied all expectations by giving an emotionally charged and heartbreaking experience that took the anime world by storm.

Studio Trigger’s signature animation style, combined with a powerful story of love, ambition, and tragedy, made Cyberpunk: Edgerunners an instant hit. It revitalized interest in the Cyberpunk franchise and proved that a well-executed anime adaptation could sur even the most skeptical expectations.

6 Re:ZERO - Starting Life in Another World

Anime Series by White Fox; Based on the Light Novel by Tappei Nagatsuki

When Re:ZERO first aired, it had a small but dedicated group of fans from its source material. However, its popularity exploded throughout its runtime, drawing in audiences who had never even heard of the series before.

The show’s gripping story, centered around protagonist Subaru’s repeated deaths and desperate attempts to change fate, stuck with viewers. Unlike many isekai anime, Re:ZERO offered a deeply psychological and emotionally intense watch, making it one of the most talked-about anime of its time.

5 Steins;Gate

Anime Series by White Fox; Based on the Visual Novel by 5pb. and Nitroplus

Visual novel anime adaptations had a shaky reputation when Steins;Gate was announced. With past disappointments like ChäoS;HEAd, few expected anything different. However, White Fox Studios created an adaptation that not only did justice to its source material but made it even better.

With its brilliant time-travel story, expertly crafted characters, and an unforgettable protagonist in Rintarou Okabe, Steins;Gate quickly became one of the most critically acclaimed anime in history. Even today, it remains a gold standard for sci-fi storytelling in anime.

4 My Dress-Up Darling

Anime Series by CloverWorks; Based on the Manga by Shinichi Fukuda

Initially, many dismissed My Dress-Up Darling as another ecchi-heavy romance with little substance. However, it defied those expectations by creating a wholesome and genuinely heartfelt romance that swept fans off their feet.

Beyond its problematic fanservice elements, the anime offered a touching story about ion, self-acceptance, and the joy of creative expression. The charming chemistry between its main characters, combined with its positive representation of cosplay culture, turned My Dress-Up Darling into a breakout hit.

3 Frieren: Beyond Journey’s End

Anime Series by Madhouse; Based on the Manga by Kanehito Yamada and Tsukasa Abe

Unlike traditional fantasy anime, Frieren: Beyond Journey's End took a slower, more thoughtful approach to storytelling. Instead of grand battles or high-stakes adventures, the series focused on themes of mortality, time, and the emotional weight of outliving loved ones.

The show’s ability to weave heartbreakingly emotional moments into a fantasy setting made it a surprise success.

While it started with modest expectations, Frieren soon captivated audiences with its deep story and breathtaking animation. The show’s ability to weave heartbreakingly emotional moments into a fantasy setting made it a surprise success and one of the most unique fantasy anime in recent years.

2 Your Name

Anime Film by CoMix Wave Films; Directed by Makoto Shinkai

Makoko Shinkai had already established himself as a talented filmmaker, but no one expected Your Name to become the global phenomenon it did. Initially, it seemed like another beautiful but niche romance film, similar to his previous works like 5 Centimeters Per Second and The Garden of Words.

However, Your Name broke all expectations, becoming one of the highest-grossing anime films of all time. Its stunning animation, emotional story, and unforgettable soundtrack captivated audiences worldwide, taking Shinkai to international fame and bringing more attention to his future works.

1 Bocchi the Rock!

Anime Series by CloverWorks; Based on the Manga by Aki Hamaji

No one could have predicted just how massive Bocchi the Rock! would become. At first, it seemed like a simple slice-of-life anime about a socially anxious girl in a band. However, its impeccable comedy, relatable protagonist, and creative animation style quickly won over audiences.

What started as a low-key series went viral, with memes, fan art, and clips spreading across the internet. By the end of its run, Bocchi the Rock! had cemented itself as one of the most beloved anime of its generation, proving that even the quietest underdogs can rise to greatness.