30 Best Seinen Anime Of All Time, Ranked (May 2025)

Anime is not a world for children’s eyes alone. While plenty of shows cater to a younger audience, some of the best in the medium fall under the seinen anime category. Distinguished from the teen-oriented shonen properties, these stories explore more adult topics.

Of course, some themes found in these types of anime may be a little uncomfortable for younger audiences. However, viewers looking for more mature stories might find that the best seinen anime are more their speed. Like shonen or shojo, seinen covers a spectrum of genres that go beyond just action or thrillers. The demographic has produced romance, slice of life, isekai, comedy, and everything else.

Updated May 4, 2025 by Mark Sammut: The Spring 2025 season is well underway, and the lineup includes a few great seinen anime. The season’s best three shows so far have been highlighted.

Best Spring 2025 Seinen Anime

Winter 2025 was a pretty great season for seinen content, and its successor has largely kept up the momentum. While still having a long way to go before reaching its conclusion, Spring 2025 has aired enough episodes to make a few informed recommendations regarding its best seinen anime.

The seinen lineup covers quite a few different genres too, including slice of life (Zatsu Tabi: That’s Journey), harem (The Shiunji Family Children), ecchi (Kakushite! Makina-san!!), school comedy (Mono), fantasy action (From Old Country Bumpkin to Master Swordsman), and workplace comedy (Catch Me at the Ballpark!). All those shows are worth watching, but they are not currently the season’s best seinen offerings.

• Uma Musume: Cinderella Gray – A prime contender to be Spring 2025’s best anime, Cinderella Gray can be easy to dismiss for a few reasons. Firstly, a story about horsegirls just sounds weird, especially one based on a gacha game. Secondly, the franchise has produced multiple anime seasons already, so a new entry could seem inaccessible to newcomers. Fortunately, Cinderella Gray stands completely on its own and requires no prior experience with the IP. A few animal traits aside, the horsegirls are just extremely passionate runners who tie their self-worth into becoming the best in Japan and the world. Finally, the show is just fantastic.
• Rock Is a Lady’s Modesty – Nowadays, girl bands reign supreme, and this subgenre has pretty consistently delivered fantastic shows. Rock Is a Lady’s Modesty seems set to be another hit, at least going by the quality of the opening episodes. The story focuses on a group of girls who attend an all-elite school and find their freedom through rock music. Lilisa and Otoha have dominated the spotlight so far, but they are gradually welcoming other girls into the fold.
• Kowloon Generic Romance – In a future where the present is mostly looked down upon as a bygone era, some people appreciate the past’s simple pleasures and prefer to live in a city framed around old Hong Kong. Reiko and Hajime are coworkers with a good relationship, although things change when an accidental confession happens. Kowloon Generic Romance is refreshing. Here is a romance seinen anime with an adult cast, a unique setting, and a strong sense of mystery.

30

Tokyo Ghoul

One Of The Best Seinen Manga Received A Pretty Good Anime Adaptation…For A Single Season

Sui Ishida’s Tokyo Ghoul is a top-tier seinen manga that should be read by anyone remotely interested in dark fantasy. On paper, this story seems like the perfect candidate for an anime adaptation, especially since it already has a huge fanbase that is ready to jump on board. While not flawless, Pierrot’s 2014 season is a respectable adaptation that covers roughly 1/3rd of the original manga, delivering good animation, intriguing characters, and great world-building. The story walks the line between action and horror, prioritizing the former while incorporating enough elements from the latter to warrant a watch for people craving gore-fests.

Unfortunately, Tokyo Ghoul notoriously went off the boil after its opening season, to the point that the sequels are better avoided. They blend elements from the manga with original content, creating a fairly confusing mess that is not satisfying as either an adaptation or an anime-only continuation. As such, Tokyo Ghoul cannot be described as one of the absolute best seinen anime, despite being among the most popular.

29

The 100 Girlfriends Who Really, Really, Really, Really, Really Love You

An Over-The-Top Seinen Harem Anime Led By The Ultimate Chad

This is it, the pinnacle of harem anime. In a genre known for sparking waifu wars, 100 Girlfriends dares to ask “but, what if they all win?” Unlucky at love, Rentaro wears his heart on his sleeve, a personality trait that has resulted in constant rejection. Before entering high school, the teenager heads to a shrine to pray for guidance, only to be directly answered by a god who reveals that Rentaro will soon be meeting 100 girls who are his soul mates. Also, he has to keep all of them happy. Brief panic attack aside, Rentaro is more than up to the task.

100 Girlfriends is both a hilarious and over-the-top parody of harem and a stellar entry in the genre. Direct and oozing innocence, Rentaro is an absolute delight, which he has to be for this premise to work. While the anime is still in its early days of adapting the manga, the female characters introduced so far are perfect matches for the lead, and they are just as funny. Season 2 is even better than its predecessor, with 100 Girlfriends fully embracing the absurdity. While the harem genre will always be niche, this series is comfortably among the best seinen anime comedies.

28

The Fable

A Dark Comedy About A Hitman Who Tries To Pass For An Ordinary Joe

The Fable had a pretty slow start, but it grew in popularity and quality throughout its two-cour run. While Katsuhisa Minami’s manga is respected, it is not a very well-known name either, which limits the adaptation’s reach to an extent. More importantly, Tezuka Productions’ animation style can seem awkward at first and requires some getting used to; even after crossing that threshold, the anime does not manage to replicate the source material’s realistic aesthetic.

Even with all those elements, The Fable is still fantastic and comfortably among the funniest anime of 2024, as long a viewer likes dark humor. The story follows an infamous hitman and his driver as they are forced to lie low for a year, which means moving to Osaka and trying to act normal. Rebranded as Akira, the eponymous Fable has no real idea of how to interact with people, and he tends to come across as creepy even when he is trying to be nice. Still, it is hilarious and oddly wholesome to see this trained killer bumble his way through ordinary life, all the while occasionally getting dragged into some rather intense Yakuza-related situations.

27

Skip And Loafer

A Slice Of Life Seinen Anime With Great Characters

A small-town high school girl moves to the big city, aka Tokyo, in pursuit of a life-long dream. As basic as this premise sounds on the surface, Misaki Takamtsu’s Skip and Loafer should not be dismissed as just another run-of-the-mill slice of life. The manga has been on a roll since debuting in 2018, and it has steadily established itself as one of the better ongoing seinen properties. Mitsumi is the girl in question, and while she is wholly unprepared for a bustling city like Tokyo, she nevertheless dives headfirst into the challenge without stopping to take a breath. She also receives a helping hand from a classmate named Shima.

Skip and Loafer blends comedy, introspection, and character development. While relatively relaxed, the story offers a grounded take on high school life, which can be dramatic and stressful. So far, P.A. Works has done a great job with the adaptation.

26

Medalist

A Sports Seinen Anime That Deserves Top Marks

Sports anime are mainly associated with shonen, but the genre has produced a couple of worthwhile seinen stories. Focusing on figure skating, Medalist immediately sinks its teeth into viewers by introducing two characters who are instantly lovable. Low on confidence but relentlessly determined, Inori’s passion for the sport is infectious, and her late start quickly establishes her as an underdog who is very much swimming against the tide.

While a brilliant character on her own, Inori does not need to carry the show solo as she is accompanied by her coach, Tsukasa. Carrying his own insecurities from regrets stemming from his career as a skater, Tsukasa is Inori’s perfect partner, one who complements his student perfectly. Even if the supporting characters and rivals are great.

25

Erased

While Not Every Story Beat Lands, This Seinen Anime Is Still Overall A Triumph

What if any event in a person’s past could be undone? Well, this is exactly the situation that the seinen anime Erased focuses on. The anime tells the story of Satoru Fujinuma and the mysterious incidents that took the lives of his mother and his childhood friends.

The twist? Satoru must use the ability that sends him eighteen years in the past, in which he must solve the incidents as his childhood self. The mystery of Erased is eye-catching, offering a good variety of fast-paced scenes and striking visuals. To say the least, most seinen fans will find something they enjoy about Erased.

24

Oshi No Ko

A Look Into The Entertainment Industry, With A Side Helping Of A Murder Mystery

Oshi no Ko has produced two great seasons that dive into the entertainment industry, all the while being wrapped up in a murder mystery and a revenge fantasy. While driven by Aqua’s desire to find the person responsible for Ai’s death, the anime primarily revolves around passionate performers and creators, who are trying to achieve something special in a deeply manipulative industry.

For the most part, seasons 1 and 2 are captivating, blending visual spectacle with charming characters who tend to clash due to their ambitious natures. As strong as its individual elements are, Oshi no Ko can feel a bit directionless and scattershot at times, especially for viewers who are primarily interested in the mystery aspect.

23

One-Punch Man

The Ultimate Overpowered MC Seinen Anime…With One Fantastic Season

One-Punch Man is kind of a weird case. The English manga is published in Weekly Shonen Jump, but the original Japanese story is found in Tonari no Young Jump, which is a seinen magazine. Consequently, the anime kind of walks the line between both, but it is ultimately a seinen series. Furthermore, the anime’s two seasons vary wildly in terms of quality, with the first entry being far better than its successor.

Madhouse handled the opening season, and the studio delivered top-notch animation that injected each fight with a sense of epicness that does justice to the source material. The humor is also on point. The eponymous hero, Saitama, defeats every opponent with a single punch, making him so overpowered that he starts to develop depression due to feeling nothing during most encounters. Season 1 is worth watching on its own and great enough to warrant a spot among the best seinen anime ever. Meanwhile, season 2 is just an above-average action anime that occasionally produces a cool moment. It is nowhere near the same level as its predecessor. Hopefully, One-Punch Man season 3 will be better.

22

Parasyte -The Maxim-

A Brilliant Seinen Anime That Gets Quite Gruesome At Times

Another modern classic of the seinen genre, Parasyte received global love for its horrific visuals and interesting concept. The story focuses on an alien species called parasites that drill into a person’s brain to control their body completely.

However, unlike how this process usually goes, the story’s protagonist Shinichi Izumi stops his parasite from taking his body, trapping it in his right hand instead. Viewers will then be held in the suspenseful pacing of the series, as they watch Shinichi and his parasite (called Migi) survive the incurring apocalypse.

21

Hellsing Ultimate

Unapologetically Outlandish In The Best Possible Way

Somehow, vampires have become their own genre among fantasy anime. From apocalyptic Seraph of the End to the dramatic Strike the Blood, vampires became commonplace. That said, it all comes back to one seinen classic in particular: Hellsing Ultimate.

The story takes audiences into the shoes of Alucard, a vampire and faithful servant of the evil-hunting Hellsing family. While the series doesn’t escape common vampire clichés (after all, it started most of them), it does make for one of the most brutal experiences in modern seinen anime. For suspense lovers who didn’t get enough violence from Berserk, Hellsing Ultimate will be sure to thrill.