1. Parasyte -the maxim- (寄生獣 セイの格率)
A species of parasitic aliens descends on Earth and quickly infiltrates humanity by entering the brains of vulnerable targets; insatiable beings that gain total control of their host and are capable of transforming themselves to feed on unsuspecting prey. High school student Shinichi Izumi falls victim to one of these parasites, but the creature fails to take over his brain and ends up in his right hand.
It has an average vote of 8.422 on TMDB.
2. Haikyu!! (ハイキュー!!)
Based off of the original Weekly Shonen Jump manga series from Haruichi Furudate, Haikyu!! is a slice-of-life sports anime revolving around Shouyou Hinata's love of volleyball. Inspired by a small-statured pro volleyball player, Hinata creates a volleyball team in his last year of middle school. Unfortunately the team is matched up against the "King of the Court" Tobio Kageyama's team in their first tournament and inevitably lose. After the crushing defeat, Hinata vows to surpass Kageyama. After entering high school, Hinata joins the volleyball team only to find that Tobio has also joined.
It has an average vote of 8.627 on TMDB.
3. Hunter x Hunter (ハンターxハンター)
Twelve-year-old Gon Freecss one day discovers that the father he had always been told was dead was alive. His Father, Ging, is a Hunter — a member of society's elite with a license to go anywhere or do almost anything. Gon, determined to follow in his father's footsteps, decides to take the Hunter Examination and eventually find his father to prove himself as a Hunter in his own right. But on the way, he learns that there is more to becoming a Hunter than previously thought, and the challenges that he must face are considered the toughest in the world.
It has an average vote of 8.647 on TMDB.
4. Noragami (ノラガミ)
Hiyori Iki is a normal middle school student until she was involved in a bus accident while trying to protect a stranger. This incident causes her soul to frequently slip out of her body, and she becomes aware of the existence of two parallel worlds. Through her soul, she meets the strange, nameless god without a shrine, Yato. Yato is determined to make a name for himself out there by accepting any wishes for 5 yen, including Hiyori's to fix her body.
It has an average vote of 8.35 on TMDB.
5. Death Parade (デス・パレード)
There is a place after death that’s neither heaven nor hell. A bar that serves you one chance to win. You cannot leave until the game is over, and when it is, your life may be too.
It has an average vote of 8.093 on TMDB.
6. Durarara!! (デュラララ!!)
In Tokyo's downtown district of Ikebukuro, amidst many strange rumors and warnings of anonymous gangs and dangerous occupants, one urban legend stands out above the rest—the existence of a headless "Black Rider" who is said to be seen driving a jet-black motorcycle through the city streets.</p><p></p><p>Mikado Ryuugamine has always longed for the excitement of the city life, and an invitation from a childhood friend convinces him to move to Tokyo. Witnessing the Black Rider on his first day in the city, his wishes already seem to have been granted. But as supernatural events begin to occur, ordinary citizens like himself, along with Ikebukuro's most colorful inhabitants, are mixed up in the commotion breaking out in their city.
It has an average vote of 7.734 on TMDB.
7. My Hero Academia (僕のヒーローアカデミア)
In a world where eighty percent of the population has some kind of super-powered Quirk, Izuku was unlucky enough to be born completely normal. But that won't stop him from enrolling in a prestigious hero academy. Now, he'll get his first taste of brutal rivalry from other schools as he braves the cutthroat, no-holds-barred provisional license exam.
It has an average vote of 8.674 on TMDB.
8. Demon Slayer: Kimetsu no Yaiba (鬼滅の刃)
It is the Taisho Period in Japan. Tanjiro, a kindhearted boy who sells charcoal for a living, finds his family slaughtered by a demon. To make matters worse, his younger sister Nezuko, the sole survivor, has been transformed into a demon herself. Though devastated by this grim reality, Tanjiro resolves to become a “demon slayer” so that he can turn his sister back into a human, and kill the demon that massacred his family.
It has an average vote of 8.684 on TMDB.
9. Squid Game (오징어 게임)
Hundreds of cash-strapped players accept a strange invitation to compete in children's games—with high stakes. But, a tempting prize awaits the victor.
It has an average vote of 7.8 on TMDB.
10. Horimiya (ホリミヤ)
A secret life is the one thing they have in common. At school, Hori is a prim and perfect social butterfly, but the truth is she's a brash homebody. Meanwhile, under a gloomy facade, Miyamura hides a gentle heart, along with piercings and tattoos. In a chance meeting, they both reveal a side they've never shown. Could this blossom into something new?
It has an average vote of 8.58 on TMDB.
11. Naruto (ナルト)
In another world, ninja are the ultimate power, and in the Village Hidden in the Leaves live the stealthiest ninja in the land. Twelve years earlier, the fearsome Nine-Tailed Fox terrorized the village and claimed many lives before it was subdued and its spirit sealed within the body of a baby boy. That boy, Naruto Uzumaki, has grown up to become a ninja-in-training who's more interested in pranks than in studying ninjutsu.. but Naruto is determined to become the greatest ninja ever!
It has an average vote of 8.359 on TMDB.
12. ERASED (僕だけがいない街)
Satoru Fujinuma is a struggling manga artist who has the ability to turn back time and prevent deaths. When his mother is killed he turns back time to solve the mystery, but ends up back in elementary school, just before the disappearance of his classmate Kayo.
It has an average vote of 8.539 on TMDB.
13. The Seven Deadly Sins (七つの大罪)
The “Seven Deadly Sins”—a group of evil knights who conspired to overthrow the kingdom of Britannia—were said to have been eradicated by the Holy Knights, although some claim that they still live. Ten years later, the Holy Knights have staged a Coup d'état and assassinated the king, becoming the new, tyrannical rulers of the kingdom. Elizabeth, the king's only daughter, sets out on a journey to find the “Seven Deadly Sins,” and to enlist their help in taking back the kingdom.
It has an average vote of 8.5 on TMDB.
14. Fullmetal Alchemist (鋼の錬金術師)
Two young brothers are raised as alchemists, but when they are severely injured trying to perform a forbidden act, they begin searching for the one thing that can save them; the fabled philosopher's stone.
It has an average vote of 8.251 on TMDB.
15. One Piece (ワンピース)
Years ago, the fearsome Pirate King, Gol D. Roger was executed leaving a huge pile of treasure and the famous "One Piece" behind. Whoever claims the "One Piece" will be named the new King of the Pirates.</p><p></p><p>Monkey D. Luffy, a boy who consumed a "Devil Fruit," decides to follow in the footsteps of his idol, the pirate Shanks, and find the One Piece. It helps, of course, that his body has the properties of rubber and that he's surrounded by a bevy of skilled fighters and thieves to help him along the way.</p><p></p><p>Luffy will do anything to get the One Piece and become King of the Pirates!
It has an average vote of 8.723 on TMDB.
16. Violet Evergarden (ヴァイオレット・エヴァーガーデン)
The Great War finally came to an end after four long years of conflict; fractured in two, the continent of Telesis slowly began to flourish once again. Caught up in the bloodshed was Violet Evergarden, a young girl raised for the sole purpose of decimating enemy lines. Hospitalized and maimed in a bloody skirmish during the War's final leg, she was left with only words from the person she held dearest, but with no understanding of their meaning.</p><p></p><p>Recovering from her wounds, Violet starts a new life working at CH Postal Services after a falling out with her new intended guardian family. There, she witnesses by pure chance the work of an "Auto Memory Doll," amanuenses that transcribe people's thoughts and feelings into words on paper. Moved by the notion, Violet begins work as an Auto Memory Doll, a trade that will take her on an adventure, one that will reshape the lives of her clients and hopefully lead to self-discovery.
It has an average vote of 8.58 on TMDB.
17. Avatar: The Last Airbender
In a war-torn world of elemental magic, a young boy reawakens to undertake a dangerous mystic quest to fulfill his destiny as the Avatar, and bring peace to the world.
It has an average vote of 8.69 on TMDB.
18. Mushoku Tensei: Jobless Reincarnation (無職転生 ~異世界行ったら本気だす~)
A 34-year-old hikikomori is kicked out of his home by his family after the death of his parents. After his eviction, he saves a group of teenagers from being killed by a speeding truck, but loses his life in the process. When he comes to, he realizes he has been reborn as Rudeus Greyrat, in a world of swords and sorcery.
It has an average vote of 8.563 on TMDB.
19. Record of Ragnarok (終末のワルキューレ)
Before eradicating humankind from the world, the gods give them one last chance to prove themselves worthy of survival. Let the Ragnarok battles begin.
It has an average vote of 8.513 on TMDB.
20. Dragon Ball Z (ドラゴンボールゼット)
The adventures of Earth's martial arts defender, Son Goku, continue with a new family and the revelation of his alien origins. Now Goku and his allies must defend the planet from an onslaught of new extraterrestrial enemies.
It has an average vote of 8.323 on TMDB.
21. Love, Death & Robots
Terrifying creatures, wicked surprises and dark comedy converge in this NSFW anthology of animated stories presented by Tim Miller and David Fincher.
It has an average vote of 8.267 on TMDB.