10 Best Anime That Are Officially 20 Years Old Now

With so many great anime series coming out every year, it’s easy to overlook the classics. But these older shows are incredibly important – they’re the foundation of the anime community we have today and deserve recognition for building that fanbase.

It’s strange to think that the anime series from 2006 are celebrating their twentieth anniversary this year. These shows once felt brand new, but now they’re considered classics. It’s actually quite surprising how many amazing anime have reached this milestone already this year.

The Melancholy of Haruhi Suzumiya Is Iconic To Older Anime Fans

Around the year 2000, anime started shifting away from action-packed shonen and sci-fi shows, and more everyday “slice of life” stories became popular. However, even the best slice of life anime weren’t afraid to get a little strange, like The Melancholy of Haruhi Suzumiya. The show centers on Haruhi, a girl determined to find the supernatural – things like aliens and people with superpowers. It seems far-fetched, but viewers soon learn that Haruhi has the incredible ability to change reality itself.

Oh man, The Melancholy of Haruhi Suzumiya was HUGE! Seriously, it took the anime world by storm. Everyone was trying to learn that iconic dance from the ending – it was everywhere online! I think it really stood out because, at the time, a lot of anime were all about action, and this was just… different. Haruhi herself was such a captivating character, and I honestly think that’s a big part of why it became so popular. It’s definitely one of the most memorable anime from that era, in my opinion.

Gintama Became Beloved Over Time

Originally not well-known outside of Japan, Gintama has become a highly acclaimed series. It centers around Gintoki Sakata, a skilled former samurai who fought to protect Japan during an alien invasion. After the war ended, he started a jack-of-all-trades business, hoping to earn just enough money for food and copies of Shonen Jump magazine. However, his past as a warrior and impressive swordsmanship constantly draw him into challenging and dangerous adventures.

I think a big reason Gintama stayed so popular for so long was how consistently good it was. Every week, you could count on it for hilarious slapstick comedy, but it was also amazing at switching gears to deliver really moving, emotional stories or some fantastic action sequences. Even today, it’s clear the series still resonates with people – we’re seeing new movies and spin-offs released, showing it’s just as beloved now as it was at its peak.

Fate/Stay Night (2006) Introduced Fans To The World Of Fate

I first encountered the world of Fate/Stay Night back in 2006 when Studio DEEN released the anime. While it doesn’t get as much attention now, it was really important for introducing a lot of people to the Nasuverse. The story centers around a battle between mages, all competing for the Holy Grail – a powerful artifact that supposedly grants any single wish.

The 2006 anime adaptation of Fate/Stay Night has always been a point of discussion among fans regarding how faithfully it follows the original story’s ‘Fate’ route. However, it remains important because it paved the way for other popular adaptations, like Unlimited Blade Works and Heaven’s Feel. Today, Fate is a massive franchise, and it all began with this initial series.

NANA Is Messy Yet Beautiful

The 2000s were a great time for anime and manga, giving fans many now-classic series. For example, Madhouse’s anime adaptation of NANA remains a highly popular shoujo title, one that continues to resonate with audiences today. Nana was a huge hit both in Japan, where it aired on television, and with its growing international fanbase.

This show centers around two women who happen to share the same name and unexpectedly become friends, each pursuing their own dreams. It’s a raw and honest exploration of love, friendship, and following what you love. Anime fans will definitely enjoy it, but be warned – with almost 50 episodes, it’s a commitment! The biggest frustration for viewers is that both the original story and the anime adaptation remain unfinished, despite a large and dedicated fanbase.

Kiba Is An Underrated Isekai Classic

Kiba is a unique story that likely wouldn’t be created today. Originally a trading card game from Upper Deck, it centers around Zed, a teen who finds himself in a magical world. There, he discovers he can use a special power called Shard Casting and fights other magic users while trying to regain his freedom.

Originally inspired by a card game, Kiba seemed like it could have been a show for everyone. However, the creators quickly stated they weren’t trying to make it appealing to kids. This approach made it a hit with adults and older teens, and for a while, it developed a dedicated following.

Hellsing Ultimate Remade An Already Beloved Series

The initial Hellsing anime series appeared on television in the early 2000s, consisting of thirteen episodes. It didn’t cover the complete story from the manga. Despite this, the show gained a following and even aired in Western countries on Encore Action, introducing many anime fans to a darker style than they were used to seeing on channels like Toonami. However, while Western audiences were getting familiar with the first adaptation, a completely new version was already being planned in Japan.

Hellsing Ultimate was an animated series created to offer a more faithful adaptation of the original manga. Production was lengthy, beginning in 2006 and spanning six years, with the animation changing studios twice before its completion in 2012. While the initial Hellsing series was well-regarded, Hellsing Ultimate gained even wider popularity and significantly boosted Alucard’s status as a prominent anti-hero.

Black Lagoon Appealed To Older Anime Fans

As anime fans matured, they started looking for shows that better matched their evolving tastes. Black Lagoon arrived just when fans who grew up with Toonami in the late 90s and early 2000s were ready for something new. The series centers around a band of smugglers operating in Asia, and is led by Revy, a tough and quick-tempered woman with a penchant for guns.

Black Lagoon gained popularity and aired on various channels, including Starz and Adult Swim. This made sense, as the show offered something different after years of anime with young main characters, appealing to an audience that had matured. While viewers now understand that violence and strong language don’t necessarily indicate sophistication, Black Lagoon remains a fun and engaging watch.

Ouran High School Host Club Is A Gender-Bending Classic

When shoujo anime were more common, Studio BONES created a popular series called Ouran. This show cleverly combined the tropes of gender-bending and reverse harems, arriving at a time when it really resonated with audiences. It centers on Haruhi Fujioka, a girl with a somewhat boyish appearance, who ends up working at the exclusive Ouran Academy’s Host Club to pay off a debt. As a host, she entertains female students.

I remember when Ouran High School Host Club first came out – it was huge with a lot of anime fans back then. It wasn’t widely available on TV in the West, but a dedicated group of us went to great lengths to find and watch it, and it really took off. It might not be as talked about now as shows like Naruto or Bleach, but for those of us who grew up with it, it still holds a special place and had a real impact.

xxxHolic Was Another Hit From CLAMP

CLAMP’s xxxHolic centers around two main characters navigating a world filled with supernatural beings. The story follows Kimihiro Watanuki, a high school student constantly bothered by spirits he can see. He seeks help from Yuuko Ichihara, a mysterious shopkeeper who is also a witch, hoping she can free him from these spirits. Yuuko agrees to help, but only if Watanuki works for her in return.

xxxHolic is a standout anime from a time when CLAMP was at the height of its popularity. Their distinctive character designs were incredibly influential, shaping the visual style of anime in the late 90s and early 2000s. Unfortunately, the anime series wasn’t long enough to cover the entire manga story.

Air Gear Merged Battle Manga With Competitive Sports

The early 2000s were a big time for action and extreme sports, which made the debut of Air Gear perfectly timed. The series blended the excitement of sports with thrilling combat, setting it apart and making it a fondly remembered hit. The story centers on Itsuki Minami, who leads a street gang until a devastating loss to a group using Air Treks – powerful, motorized skates – forces him and his friends into the high-stakes world of A-T, a world far more intense than they imagined.

For those who loved action-packed manga like Yu Yu Hakusho, Air Gear was a great introduction to sports anime. It delivered the intense fights fans expected, but also highlighted the fun and excitement of competition, even if it wasn’t a traditional sport. Released before popular series like Kuroko’s Basketball, Air Gear feels like a precursor to many of the sports anime that later gained popularity in the West.

2026-04-26 22:52