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Anime / ID: Invaded

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ID:Invaded is an original Japanese anime television series by NAZ that is directed by Ei Aoki and written by Ōtarō Maijō. The series premiered on January 5, 2020. A manga adaptation by Yūki Kodama was announced on September 4, 2019.

Sakaido awakes one day to find himself in a mysterious room... where his body immediately starts to mysteriously fall apart. After literally putting himself together, he realizes that he has amnesia: all that he can remember is his name, that he needs to investigate the murder of a girl named Kaeru, and that he is a brilliant detective.

Cut to the police investigation team who are watching him through a mysterious system called the Mizuhanome, which allows people to dive into the minds of murderers and uses their mindscape as well as Kaeru as an impetus to find information in order to solve crimes. Sakaido, whose real name is Akihito Narihisago, is a former police officer who is paying his penance by diving into Wells for a special division of the police.


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This series provides examples of:

  • A Father to His Men: Matsuoka very much cares for the safety of his men while doing investigations and is even willing to send Hondoumachi to the special division just to make sure that they stay safe while doing investigations.
  • Asshole Victim: Narihisago's "victims", being serial killer themselves (see Serial-Killer Killer entry below). It stands in contrast with all the serial killers we've seen so far, whose victims, for the most part, are completely innocent civilians.
  • Badass Adorable: Hondoumachi as an investigator and in the Well as a Brilliant Detective. She even wears a iconic detective outfit too!
  • Break Them by Talking: Narihisago does this to a fellow inmate in episode 3. It's later said that it's not the first time. It drives him to suicide.
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  • Buried Alive: How the Gravedigger kills their victims. They make it even worse by livestreaming their slow deaths online.
  • Cloudcuckoolander: Let's just say that Fukuda is not the most sanest person when he's inside the Well. As a Brilliant Detective, he becomes very hammy and likes to do funny Finger Gun poses and occasionally speak with Gratuitous English. Although, silliness aside, he does become quite competent as a detective when working together with Narihisago.
  • The Corrupter: John Walker, whose blurry image appears in the Wells of multiple serial killers and is probably the reason for them becoming serial killers in the first place.
  • Crossing the Desert: Episode eight features Sakaido and Anaido traveling through a dangerous desert Well.
  • Dark and Troubled Past: Narihisago. Muku, his only daughter was brutally murdered by a serial killer and his wife committed suicide after said incident. Avenging his daughter is what landed him in prison.
  • Death of a Child: Narihisago's daughter, Muku was murdered by a serial killer called "The Challenger".
  • Digital Avatar: The person who enters into the Well will change their appearance and name. So far, Narihisago (as Sakaido) changes his appearance to what he looked like in his prime, Fukuda (as Anaido) appears with having no scar and looks younger along with an elaborate trench coat outfit, and Hondoumachi (as Miyo Hijiriido) who's wearing a cute looking detective outfit.
  • Floating Limbs: Narihisago inside Fukuda's Well caused him to gain this. Because Fukuda's mind was fragmented, this also affected Narihisago, who started out as floating chunks of his body before refitting himself back to normal except for his left elbow, making a floating gap in his left arm. This actually becomes helpful in him solving the first case because he can detach his left forearm and hand to extend and reach for objects that he needs to use for the case like floating platforms and such. However, this remains exclusively for the first case as Narihisago is later seen to remain whole in other people's Wells because they weren't fragmented like Fukuda's was.
  • Friendly Enemy: After the arrest of Fukuda the Preforator, he decides to spend his days in jail talking to Narihisago for company, at some points, even teasingly calling him "senpai" and "partner". The "partner" part plays into effect when Narihisago and Fukuda have to enter into the Well as a pair to save Hondoumachi. Although Fukuda tends to annoy Narihisago in the Well, they do surprisingly get along as Brilliant Detectives.
  • Great Detective: The identity taken on by people who dive into wells. In the real world, Narihisago used to be this and Hondoumachi is shaping up to be this. Also notable is Wakashika.
  • Hero-Worshipper: Hondoumachi really respects Narihisago as the Brilliant Detective and aspires to be like him someday.
  • Hope Spot: We follow a girl who was kidnapped and Buried Alive, with her final moments being livestreamed. She's determined to be rescued and assures those watching her that she'll make it out alive. The police finally find where she's buried and break her out of her confinement... only to find out that she died days ago, and the livestream everyone was watching was pre-recorded.
    • Also goes for a version of her in the killer's well. Sakaido does manage to finally save her from the burning building, but he also realizes that this is essentially meaningless, as the real girl is dead.
  • Impossibly Cool Clothes: Played with. The opening scene of the series (and the promotional art) makes it look like the series is going for this, based on the first we see of Narihisago and his outfit. But it turns out the trope only applies to detectives' appearances in the Well. Outside, clothes are fairly standard. That said, You Gotta Have Blue Hair still applies, even outside the Mental World.
  • Jack the Ripoff: It turns out the killer in episode 4 isn't the Gravedigger as initially thought, but is copying their method in order to pin a murder on them and cover up their own involvement.
  • Lobotomy: How the Perforator kills his victims. He also did it to himself first.
  • Meaningful Name: John Walker is a reference to Johnnie Walker, an alcohol brand.
    • The common element in the brilliant detctives' names (井戸) means "well", as in a well for water, as well as being a reference to the id (井 by itself also means "well"). Anaido (made of the character for "hole" and the common suffix) has a reference to the hole in Fukuda's head, despite Anaido lacking the hole in question.
  • Mental World: Played with. The Id-Well is a world created from particles emitted by a person with murderous intent and is a "snapshot" of their mind when they had those thoughts. Some such as Narihisago's can last be years old if the intent that produced them is strong enough. Appropriately, the objects within it represent more abstract things that the killer was thinking at the time.
  • Mission Control: Momoki and his team are this. They control the Mizuhanome and observe the actions of Narihisago inside the Well to determine hints and motives as well as valuable information, which is then sent over to the investigation team to solve cases.
  • Old Cop, Young Cop: Matsuoka and Hondoumachi. However, Matsuoka sends Hondoumachi to work in the special division for the safety of his men and himself.
  • Older Than They Look: Hondoumachi is actually 23, but her short and young looks make Matsuoka believe that she could easily pass off as a middle schooler.
  • Only Friend: Momoki to Narihisago.
  • Police Procedural: A very unconventional one.
  • Posthumous Character: As we find out fairly early on, Narihisago's wife and daughter are long dead.
    • Played With in the case of Kaeru-chan: every time a Great Detective jumps into a well, she is already dead. But as Narihisago keeps reminding himself, she is just an abstract concept that only exists within the well. The very purpose of her "existence" is to act as a murder victim, so that the Detective has a case to solve.
  • Roaring Rampage of Revenge: In the past, an angry Narihisago gets his revenge on The Challenger. The Challenger did deserve it after all, but it's deconstructed in that the legal system still considers his actions to be murder.
  • Scars Are Forever: Fukuda has a nasty scar on the right side of his face along with the hole on his forehead that he drilled onto himself. Hondoumachi has a similar scar because of Fukuda and although she recovered at the hospital, blood still tends to leak from her scar.
  • Self-Harm: Fukuda drilled a hole through his own skull. And survived. It was probably motivated by mental illness, which only became worse after he damaged part of his brain.
  • Serial Killer: The criminals that are investigated are all this.
    • The end of episode 6 implies that Hondoumachi has the potential to be one and that being a serial killer is a requirement for being able to dive into Wells. While it was implied before, this is the first confirmation that Narihisago is also a serial killer.
  • Serial-Killer Killer: Narihisago. Deconstructed in that the legal system still considers it to be murder.
  • Sherlock Homage: Hondoumachi's Well outfit is modeled after Sherlock's iconic hat and coat.
  • Spell My Name with an "S": Hondomachi/Hondoumachi.
  • SWAT Team: The investigators are assisted by various Anti-Firearms Squad units when a lot of firepower is required to apprehend dangerous criminals and other bad guys.
  • Strapped to an Operating Table: Hondoumachi is kidnapped by the Perforator and strapped to a metal table in episode 2, but she is rescued shortly after thanks to Matsuoka and his unit and from the support of Narihisago.
  • This Is a Drill: The Perforator uses a powered hand drill to drill holes through the heads of his victims.

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