20 Best Anime series like Cagaster of an Insect Cage (2020)

Shinichi Izumi is a normal high school boy whose right hand has become infected with an alien parasite that names itself "Migi" ("right"). Migi is the first parasite to develop a symbiotic relationship with its host, as he and Shinichi slowly develop a grudging friendship. Migi isn't the only Parasite on earth, however, and as cases of Parasites killing humans begin to emerge, humans seek to kill off Parasites. Shinichi and Migi find themselves caught in between these two sides of the struggle over planet earth.

If you are chosen by the bizarre black sphere known as the Gantz, you are already dead—yet you might be able to reclaim your mortality. First, the Gantz demands that you undertake brutal missions of madness, killing aliens hidden among the population. It is your only chance and you have no choice. You must play this disturbing game. And if you die again—and you likely will—it’s permanent.

Years after the horrors of Raccoon City, Leon and Claire find themselves consumed by a dark conspiracy when a viral attack ravages the White House.

Many centuries ago, man's Armageddon gave birth to the vampires' wrath. As man and immortal clash, a reality-shattering threat looms. Hope resides solely in a new breed of hunter operating under the Vatican's authority. The true battle between holiness and evil has begun.

Legendary half-vampire, half-human vampire hunter Blade is tracking Deacon Frost, a very powerful and influential vampire who killed his mother and who heads Existence, a secretive vampire organization that operates in Southeast Asia.

A samurai lord has bartered away his newborn son's organs to forty-eight demons in exchange for dominance on the battlefield. Yet, the abandoned infant survives thanks to a medicine man who equips him with primitive prosthetics—lethal ones with which the wronged son will use to hunt down the multitude of demons to reclaim his body one piece at a time, before confronting his father. On his journeys the young hero encounters an orphan who claims to be the greatest thief in Japan.

One night, Kyouhei and Hibino discover a dead body and coincidentally Kyouhei’s sister appears with the doll called Kamisama she controls.

Girls from all over the world gather at IS Academy to learn how to become IS pilots. However, since Ichika can somehow pilot the IS even though he is male, he was forced to attend IS Academy as the only male in this school.

2150 A.D. The battle with the Festum, the silicon life-forms from distant outer space, had reached a new dimension. The North Polar Meir that was crushed during the First Azure Operation had dispersed its fragments all over the world. They all started activity on their own as independent Meirs. Most of the Meirs harbored hatred towards humanity and challenged a fight, however, a portion of the Festum chose coexistence with mankind. Amongst the crossfire, the Ryugujima island alone disappeared from the forefront of battle and continued its silence. The island had gained a means to converse with the Meir since their encounter with Misao Kurusu two years ago. The children of ALVISS had been searching for a way to understand the enemy as they prepared for battle. And now, once again, further evolution was about to befall the island. A girl that understands the language of the Festum, and a girl protected by a Festum. When the two meet, the doors to a new universe opens.

In 1972, the Apollo 17 mission discovered a hypergate to Mars on the surface of the moon. Soon a war breaks out between Earth and Mars, and Martian soldiers begin to descend from the sky, riding steel giants, intent on exterminating humanity.

Invertia was a meteor storm that caused an unprecedented disaster during the 20th century. Because of this disaster, numerous cities around the world were destroyed. However, within the meteor, an unknown element called mana was discovered. It allowed human technology to make rapid strides giving rise to a new species of super-powered humans, the Star Pulse Generation (Genestella). The Festas (Star Warrior Festivals) host battles between Genestella at a city of six academies called “Rikka,” also commonly known as “Asterisk.”Scholarship student Ayato Amagiri transferred into Seidoukan Academy in order to fulfill his own wish, swearing he too will fight in this city.

One fateful day, all of humanity was petrified by a blinding flash of light. After several millennia, high schooler Taiju awakens and finds himself lost in a world of statues. However, he's not alone! His science-loving friend Senku's been up and running for a few months and he's got a grand plan in mind, to kickstart civilization with the power of science!

Imperial Capital, 1930. A strange group of people carrying musical instrument cases landed on Tokyo station. They are called the "Jaegers", who came to hunt vampires. Amongst them, there stood a young man with striking serenity and unusual aura. His name is Yuliy, a werewolf whose home village was destroyed by vampires. Yuliy and the Jaegers engage in deadly battle over a mysterious holy arc only known as "The Arc of Sirius". What truth awaits them at the end...?

The story revolves around Kaiman, who does not remember who he was before he was transfigured by a Magic user. This transformation left him with a reptile's head, and a desire to find out the truth about who he really is. Accompanied by Nikaido, his female companion, he tracks down Magic Users in "The Hole" and unceremoniously chomps down on their head, hoping to find out who it was that put him in this state. One by one, they witness this "second man" inside the head of Kaiman, and after pulling them back out of his mouth he asks them all a question... "What did the guy inside my head say?"

A gate to another dimension has burst open, and from it emerge gigantic invincible creatures that threaten all of humanity. Earth's only defense is a mysterious group of warriors who have co-opted the alien technology in order to fight back!

In the year 2063, eight high school students and a kid are flown out to Planet Camp, tasked with surviving on their own for a few days. But shortly after arriving, an ominous glowing orb warps them to an unknown quadrant of space, nearly 5,012 light years away. Now, the only way back home is a slow, dangerous trek across the universe—a journey that’ll test them in ways Planet Camp never could.

Brought together by a mysterious song, a grad student and an engineer lead the fight against an unimaginable force that may spell doom for the world.

When an island half-disappears from the face of the earth, a mysterious organization sends out invitations for a tournament to every skilled fighter in the world. "If you win you can have ANYTHING you want," they claim. They're recruiting only the best to fight the best and claim the title of The God of High School. Jin Mori, a Taekwondo specialist and a high school student, soon learns that there is something much greater beneath the stage of the tournament.

Btooom!, stylized as BTOOOM!, is a Japanese manga series written by Jun'ya Inoue and serialized in Weekly Comic Bunch and later in Monthly Comic Bunch. An anime adaptation by Madhouse aired in Japan on Tokyo MX and was streamed with English subtitles by Crunchyroll from October 4 to December 20, 2012. It has been licensed in North America by Sentai Filmworks.

Angel Beats takes place in the afterlife and focuses on Otonashi, a boy who lost his memories of his life after dying. He is enrolled into the afterlife school and meets a girl named Yuri who invites him to join the Afterlife Battlefront — an organization she leads which fights against God. The Battlefront fight against the student council president Angel, a girl with supernatural powers.

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During the construction of the Kurobe Dam, an ancient artifact was discovered, and so the United Nations Kurobe Research Institute was established. Intellectuals from all over the world gathered to study the object, and the children of those researchers attend Mt. Tate International Senior High School, including the institute head's daughter, Yukina Shirahane. In the summer of 2016, a lone samurai once again awakens.

The story centers around two fiercely fighting schoolgirls, Ryuuko Matoi and Satsuki Kiryuuin. On a campus ruled by force, a transfer student wielding a Basami sword brings about upheaval.

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In the year 2045, after global capitalism has defaulted, Japan's elite Section 9 begins conducting covert cyber operations.

High-school girl Yuri suddenly finds herself on the rooftop of a high-rise building. She's trapped in a bizarre world surrounded by skyscrapers, where a masked man cracked open a man's head with an axe before her eyes. Finding a way to survive this bizarre world, find her beloved brother, and escape becomes her top priority, but she is beset by danger not just from the mysterious Masks, which possess both inhuman strength and cruelty, but other survivors turned cruel or desparate by the insanity of the high-rise world.

Wolverine is a mutant, possessing animal-keen senses, enhanced physical capabilities, three retracting bone claws on each hand and a healing factor that allows him to recover from virtually any wound, disease or toxin at a accelerated rate.

Tomie Kawakami is a femme fatale with long black hair and a beauty mark just under her left eye. She can seduce nearly any man, and drive them to murder as well, even though the victim is often Tomie herself. While one lover seeks to keep her for himself, another grows terrified of the immortal succubus. But soon they realize no matter how many times they kill her, the world will never be free of Tomie.

Alcohol, smoking, and stress—in the body subjected to these irritants, the cells responsible for maintaining life seem to fight a war that never ends. Due to a severe shortage of workers, Red Blood Cell AA2153 has to quickly learn to deliver oxygen and collect carbon dioxide, even in dangerous conditions. Meanwhile, White Blood Cell U-1196 has to do her part by dealing with germs and viruses during life-threatening situations. In the midst of these crises, they have to work together to keep the body healthy, despite not knowing if their sacrifices will be worthwhile. Cells at Work! Code Black takes a different approach by showing the grittier side of the jobs our cells perform.

Inuyashiki Ichirou is down on his luck. While only 58 years old, his geriatric looks often have him written off as a pathetic old man by the world around him and he’s constantly ignored and disrespected by his family despite all that he’s done to support them. On top of everything else, his doctor has revealed that he has cancer and it appears that he has little time left in this world. But just when it seems things couldn’t get any worse, a blinding light in the night sky strikes the earth where Ichirou stands. He later wakes up to find himself unscathed, but he soon starts to notice that there’s something… different about himself. However, it turns out that these strange, new changes are just what Ichirou needs to take a new lease on life and now it seems like there’s nothing to stop him from being a hero worthy of the respect that he never had before… unless, that is, there was someone else out there with these same changes…