10 Best Underrated Anime with Over 50 Episodes You Must Watch

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For those who’ve already explored the best underrated anime with over 100 episodes, you know the satisfaction of diving into lengthy stories that let you get lost in intricate plots and unforgettable characters. But what if you’re looking for something a bit shorter—still long enough to develop depth but more manageable? That’s where anime with over 50 episodes come in. These series strike the perfect balance, offering the same immersive experience without the massive time commitment. If some of these anime are region-locked, using a VPN like NordVPN will help you access them.

In this post, we’ll dive into some of the best underrated anime with over 50 episodes. These hidden gems may not be as popular, but they stand out for their exceptional storytelling, world-building, and character arcs. While some remain unfinished, each one is a journey worth taking. You can stream almost all of these underrated anime gems on one of the 14 streaming platforms listed here. To avoid interruptions, remember to use a good VPN and an adblocker for a seamless viewing experience.

Kekkaishi

Kekkaishi

Synopsis:
Kekkaishi follows Yoshimori Sumimura, a high school boy who inherits the responsibility of being a Kekkaishi, a spirit hunter who must protect his school from evil spirits called Ayakashi. His childhood friend Tokine helps him, and together, they struggle with their abilities and heritage.
Release Date: October 2006
Length: 52 Episodes

What Makes This an Underrated Anime

Kekkaishi is often overlooked, even though it offers a refreshing take on the shonen genre. One of its standout features is the use of Kekkai barriers, which provide a strategic, almost puzzle-like element to the fights. This tactical approach sets it apart from other shonen that focus more on brute force. However, despite this focus on strategy, the story later hints at a hidden power within the main character, suggesting that, like other shonen protagonists, he might possess the potential for overwhelming force. While some may find the pacing slow initially, the story builds suspense through unresolved secrets, keeping the audience hooked as it progresses.

The art and animation were also noted for their simplicity but clarity, making the action scenes easy to follow. Kekkaishi doesn’t get the recognition it deserves because it aired during a time when more mainstream series like Naruto and Bleach dominated the shonen landscape. However, those who gave it a chance often praised it as a hidden gem of the genre, making it one of the best underrated anime with over 50 episodes. Its unique use of powers, coupled with consistent character development, makes it a must-watch for any fan of supernatural action.”

Nura: Rise of the Yokai Clan

Nurarihyon no Mago

Synopsis:
Nurarihyon no Mago tells the story of Rikuo Nura, a part-human, part-yokai who must embrace his yokai heritage to lead his clan. Rikuo fights to balance his normal school life with his duties as the heir to the Nura Clan.
Release Date: July 2010
Length: 52 Episodes

What Makes This an Underrated Anime

While Nurarihyon no Mago delivers stunning action scenes and engaging yokai mythology, it never quite reached the level of fame it deserved. The anime presents a richly detailed world of spirits and yokai, making it a standout in its genre. Fans admire how the show balances the main character Rikuo’s dual heritage—human by day, yokai leader by night—leading to compelling internal conflicts about his identity. The integration of Japanese folklore adds depth, elevating it beyond a typical action series.

Despite its compelling narrative and engaging fight scenes, it struggled to gain traction against more commercialized anime. However, viewers who appreciate character-driven storytelling and a blend of action with supernatural themes often hold Nurarihyon no Mago in high regard, cementing its place as a classic in underrated anime with over 50 episodes. Its focus on Rikuo being the next heir to a powerful clan also gives it a slight “mafia” vibe, appealing to fans of clan-centric anime like Hitman Reborn. The mix of family duty, inner conflict, and intense action makes it a hidden gem for those seeking something beyond mainstream titles.

Monster

Monster

Synopsis:
Monster follows Dr. Kenzo Tenma, a brilliant brain surgeon whose life spirals out of control after saving a boy who becomes a serial killer. Riddled with guilt, Tenma hunts down the boy to stop his murderous spree.
Release Date: April 2004
Length: 74 Episodes

What Makes This an Underrated Anime

Monster is often hailed as one of the most thought-provoking and intense anime experiences, yet it remains underrated due to its slow pacing and lack of flashy action. Its exploration of moral dilemmas, human psychology, and deep ethical questions sets it apart from more mainstream anime. Johan, the antagonist, stands as one of the most chilling and enigmatic characters in anime history, making the show a gripping watch for those who enjoy psychological thrillers.

Although it’s a lengthy series, Monster never loses its tension, maintaining suspense in a way that few other anime can. The mature themes and intricate plotting make it a must-watch for anyone interested in psychological dramas. While its serious tone and lack of supernatural elements may deter some viewers, it remains a hidden gem for those willing to invest in a more intellectual, slow-burn anime.

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Eureka Seven

Eureka Seven

Synopsis
Eureka Seven tells the story of Renton Thurston, a teenager who dreams of escaping his mundane life to join the Gekkostate, a rebellious group of pilots. His life changes when he meets Eureka, a mysterious pilot, and embarks on a journey full of mecha battles, love, and self-discovery.
Release Date: April 2005
Length: 50 Episodes + Movies

What Makes This an Underrated Anime

While Eureka Seven is known for its well-executed mecha battles and heartfelt romance, it remains underrated compared to other mecha anime. The series explores complex themes such as war, environmental destruction, and personal growth. One standout feature is its coming-of-age narrative, which resonates with viewers who have followed Renton’s emotional journey. The character development, particularly the arcs of Eureka and Renton, is intricately woven, and their romance feels authentic, blending seamlessly with the action and drama. The show’s smooth animation, especially during the mecha “reffing” scenes, and its eclectic soundtrack elevate it beyond typical genre conventions.

Despite this, Eureka Seven often gets overshadowed by more prominent series like Neon Genesis Evangelion. However, its focus on emotional depth, moral dilemmas, and a strong supporting cast makes it one of the best underrated anime with over 50 episodes. Many fans believe it deserves far more recognition for its balance of philosophical depth, romance, and epic sci-fi action.

Mobile Suit Gundam: Iron-Blooded Orphans

Kidou Senshi Gundam: Tekketsu no Orphans

Synopsis
Iron-Blooded Orphans follows a group of child soldiers, known as Tekkadan, who fight for their freedom and survival in a brutal universe. The series offers a darker, more mature take on the Mobile Suit Gundam franchise, exploring themes of child exploitation and war.
Release Date: October 2015
Length: 50 Episodes

What Makes This an Underrated Anime

Iron-Blooded Orphans brings a fresh, more realistic spin to the Gundam universe. Despite being part of such a renowned franchise, this series remains underrated, as it focuses on darker, more mature themes like the impact of war on children and the morally ambiguous nature of conflict. The character development, particularly of protagonist Mikazuki and the Tekkadan crew, adds emotional depth and complexity to their struggles. Unlike other Gundam series that center on larger-than-life heroes, this anime highlights underdog characters facing real, human challenges.

The series features intricate political dynamics and moral dilemmas that make it a standout, though it often gets overlooked due to its more somber tone. Fans appreciate its compelling narrative, with many calling it one of the best underrated anime with over 50 episodes for its blend of action, emotion, and thought-provoking storytelling.

Natsume’s Book of Friends

Natsume Yūjin-chō

Synopsis
Natsume’s Book of Friends revolves around Takashi Natsume, a boy who can see spirits and inherits a book from his grandmother that contains the names of yokai she bound. Natsume embarks on a journey to return the names and free the spirits while forging new friendships.
Release Date: July 2008
Length: 74 Episodes

What Makes This an Underrated Anime

Natsume’s Book of Friends is a rare gem in the world of underrated anime with over 50 episodes. Its peaceful, contemplative storytelling sets it apart from more action-heavy series. Focusing on human connections and an empathetic portrayal of both spirits and humans, the anime has earned a devoted fanbase. Yet, it remains underappreciated by mainstream audiences. What stands out most is the emotional depth and the way it explores themes like loneliness, friendship, and acceptance.

What makes this anime truly underrated is its ability to convey profound, heartwarming stories without relying on dramatic conflict. The relationships Natsume forms with both humans and yokai are beautifully developed, making it a standout for fans of supernatural and slice-of-life genres. Despite its relatively slow pace, the anime offers a rich, immersive experience, making it a top recommendation for those seeking meaningful, character-driven narratives.

Kaiji: Ultimate Survivor

Gyakkyo Burai Kaiji

Synopsis: Kaiji centers around Kaiji Itou, a down-on-his-luck man who becomes embroiled in life-or-death gambling situations. The stakes are high as Kaiji faces off against ruthless opponents in psychological battles that test both his intellect and his will to survive.
Release Date: October 1992 – January 1995
Length: 112 Episodes

What Makes This an Underrated Anime

Kaiji is an intense psychological thriller that keeps viewers on edge with its high-stakes gambling and mind games. Despite its captivating plot, the series remains underrated, largely due to its gritty art style and unconventional premise, which may not appeal to fans of traditional shonen anime. Despite the unconventional art style, it turned out to be the best way to portray the dramatic facial expressions that few other anime manage to capture as effectively.

Fans who appreciate psychological depth often compare it to works like Death Note and Code Geass, though Kaiji offers a more grounded, human story. The series delves into themes of desperation, greed, and human nature, making it a compelling watch for those who enjoy cerebral anime. Despite its thrilling and often unpredictable narrative, Kaiji is not as widely celebrated as it deserves to be, standing out as a truly underrated anime with over 50 episodes.

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The Twelve Kingdoms

Jūni Kokuki

Synopsis: Juuni Kokuki follows Youko Nakajima, an ordinary high school student who is suddenly transported to a parallel world governed by complex political systems and fantastical creatures. She must navigate this new world, where she discovers her destiny as a ruler of one of the kingdoms.
Release Date: October 2011 – September 2014
Length: 148 Episodes + Movies

What Makes This an Underrated Anime

Juuni Kokuki stands out as one of the most intricately crafted fantasy anime, featuring deep world-building that goes beyond the typical hero’s journey. It delves into political and philosophical themes that elevate it above standard adventure anime. It was especially great to see the transformation of its protagonist, Youko, who evolves from a timid, insecure girl into a confident and capable leader. The anime skillfully handles multiple plot arcs across various kingdoms, and despite its rich complexity, it avoids feeling overly convoluted​.

One of the strengths of Juuni Kokuki is its mature storytelling, featuring characters who undergo realistic growth. However, the anime is often overlooked due to its slow start, and its character designs, along with the overall aesthetic, led many to initially dismiss it as just another generic fantasy anime. A notable drawback is the lack of a conclusive ending for certain subplots. Despite this, the series hooks viewers early on and quickly becomes an addictive watch, earning it a place in the underrated anime category. With only 45 episodes, it doesn’t quite reach the “anime with over 50 episodes” mark, but it still packs a punch with its depth and complexity.

Beet the Vandel Buster

Bōken Ō Beet

Synopsis:
Beet the Vandel Buster is set in a world where humanity is plagued by powerful demons called Vandels. Beet, a young boy with dreams of becoming a Vandel Buster, inherits the powerful weapons of the Zenon Squad after their tragic defeat. Armed with their “Saiga” weapons, Beet sets out to defeat the Vandels and avenge his fallen heroes.
Release Date: September 2004
Length: 77 Episodes

What Makes This an Underrated Anime

Although Beet the Vandel Buster is a classic shonen, it doesn’t get the recognition it deserves. One reason might be its simplistic RPG-like premise, where characters level up and gain new skills—an element some may find repetitive. But is that really a bad thing? The best aspect of the series is undoubtedly its unique world-building and the RPG elements, which evoke a nostalgic “level-up” feel reminiscent of classic video games.

While it may not be groundbreaking, with its somewhat formulaic shonen setup, it’s still enjoyable to watch the character growth and engaging battles. The music, especially for an older show, adds to the epic feel of the journey. Despite spanning 52 episodes, the series didn’t even manage to fully form the main party, suggesting a potentially long-running series—if a continuation ever happens. However, given the author’s health issues, it’s uncertain whether fans will ever see a conclusion. Overall, Beet the Vandel Buster remains an underrated anime, offering enough charm and classic tropes to satisfy action-adventure fans looking for a long series.

Mushishi

Mushishi

Synopsis:
Mushishi follows Ginko, a Mushi Master, who travels across the countryside helping people affected by Mushi—spiritual creatures that exist beyond the ordinary laws of nature. The series explores mysterious and philosophical themes, focusing on the balance between humans and nature.
Release Date: October 2005
Length: 47 Episodes + Movie

What Makes This an Underrated Anime

Mushishi is widely regarded for its unique storytelling, focusing on episodic mysteries rather than a continuous plot. The main allure of anime for many is the continuous plot they have, hooking people into binge watching, however, Mushishi is one of the few that can break that norm and be succesful. It’s an incredibly atmospheric and introspective anime that explores philosophical themes about nature and existence. While it enjoys a dedicated fan base, Mushishi is still underrated, particularly because its slow pace and minimal action put it outside the mainstream anime trends​.

The series is praised for its stunning visuals and hauntingly beautiful soundtrack, which perfectly complements the contemplative tone. Fans and critics alike admire its thought-provoking content, but it remains under the radar due to its niche appeal. For those looking for an introspective, tranquil series with deep emotional resonance, Mushishi is one of the finest underrated anime with over 50 episodes.

Conclusion

Long-format anime offers a unique opportunity for fans to truly get lost in a story. With over 50 episodes, these underrated anime allow for deep character development, intricate world-building, and epic narratives that keep viewers engaged for hours. Whether you’re drawn to supernatural mysteries like Kekkaishi, political intrigue in The Twelve Kingdoms, or psychological thrillers like Monster, each of these anime offers something special.

These underrated anime with over 50 episodes are hidden gems that deserve a spot on your watchlist. Don’t miss the chance to explore these long-running series, where you can immerse yourself in stories rich with emotional depth and action.

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