Kiseijuu: Sei no Kakuritsu

All of a sudden, they arrived: parasitic aliens that descended upon Earth and quickly infiltrated humanity by burrowing into the brains of vulnerable targets. These insatiable beings acquire full control of their host and are able to morph into a variety of forms in order to feed on unsuspecting prey.

Sixteen-year-old high school student Shinichi Izumi falls victim to one of these parasites, but it fails to take over his brain, ending up in his right hand instead. Unable to relocate, the parasite, now named Migi, has no choice but to rely on Shinichi in order to stay alive. Thus, the pair is forced into an uneasy coexistence and must defend themselves from hostile parasites that hope to eradicate this new threat to their species.

[Written by MAL Rewrite]

Izumi, Shinichi Main

Shimazaki, Nobunaga Japanese

Migi Main

Hirano, Aya Japanese

Tamiya, Ryouko Supporting

Tanaka, Atsuko Japanese

Kimishima, Kana Supporting

Sawashiro, Miyuki Japanese

Murano, Satomi Supporting

Hanazawa, Kana Japanese

Joe Supporting

Murase, Ayumu Japanese

Gotou Supporting

Inoue, Kazuhiko Japanese

Uragami Supporting

Yoshino, Hiroyuki Japanese

Hirokawa, Takeshi Supporting

Mizushima, Yuu Japanese

Uda, Mamoru Supporting

Suzuki, Takuma Japanese

Nakatani, Toshio Producer

Shioiri, Souta Producer

Ooshima, Yuka Producer

Inage, Hiroyuki Producer

Reviews

Jun 16, 2025

GamiKhan

Recommended

So I first watched parasyte when I was a young teen, after 10 years I decided it was worth a shoot to rewatch it, needlesly to say that I wasnt disapointed.

The main theme without a doubt is the circle of life, more so focused on canivores, forms of lifes that consume other forms of life to survive, parasyte has a double meaning because parasites in a broad sense is nothing more than a form of life getting its substance from another, which after seeing the show, makes you think if there is any difference between that definition of parasite vs carnivores, we both disregard any ... other form of life apart of ourself to nourish us.

So yeah... the show spends its whole run showing how vile the parasytes are, just for us to be the other side of the same coin, and not only for being carnivours but for damaging the earth too.

Apart of that theme, there is the subtheme of growing, just like the parasytes grow in this anime, we see the main character grow aswell. We start off by being someone shy that after dealing pain to his mother, becomes a shell of itself, we dont see much of him but he probably didnt feel much if at all, would have certainly gotten bullied and would have never believed that he could be loved.

I am not saying this last part to make it seem that the anime is like something it isnt, but he undoubtly progresses as a person be it for having someone to bond, or for the many traumatic experiences. Which are two of the only ways to actually change in my opinion and the parasytes show it aswell, the two parasites with human host, the parasyte that became a mother, they bonded and grew much more than any other parasyte even when supposedly being weaker.

Lastly lets talk about the fragility of the parasytes, they mention this multiple times and if you really think about it you can really get to understand to what level of fragility they all have. We clearly see this with the 5-man parasyte, the reason he dies is not only because his weakness to compounds but also because he could not align all the parasytes to defeat izumi before regenerating.

And just like he could not align his 5 parasytes minds, I think something similar happens to every single parasyte, they need to be conceptually and mentally strong to remain whole, funnily enough they werent more easily defeated exactly because the military could not concieve of these alien-like manhunters to be frail, they are shown to think only about the possibility of ultimately killing them, which they intend to do with a high caliber shotgun. However exactly that is what makes it hard for them to be victorious.

Any use of fire, acid or mostly anything that affects cells in a pretty heavy way, just like they affect us, would have done the job much more efficiently. But they ignore that, just like we ignore everything that we put in the bound of not in our control even if it is in out total control, which goes over the many mentions of other live and the world suffering.

Reviewer’s Rating: 9

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Jun 5, 2025

Shirogari

Mixed Feelings

Kiseijuu or Parasyte is an anime with a title that ironically enough does not unambiguously refer to the parasites that the anime is about. Good luck figuring that one out (episode 21 4:10).

Parasyte has a pretty interesting story about parasitic aliens appearing on the world. The story takes place over a relatively long period of time (more than a year) which gives the situation a lot of time to develop which makes the story way more interesting. It does however lead to a slightly jarring switch in pacing near the end when a lot of events happen in a single day. A problem with the ... story is how it's situated in the rest of the world. In Hollywood movies aliens always invade New York or some other US city, it is then unsurprising that in this Japanese work the main place the story takes place is in the mid-sized Japanese city of Fukuyama. What is surprising however is that in the story the events that take place in Fukuyama have a disproportionally huge effect on the rest of the world while they really shouldn't which detracts from the story a bit. There are quite a few nice philosophical and horror elements in this story.

The characters are quite good. They are well written, have believable personalities and I often enjoyed just watching them interact. The anime does, however, enjoy putting them in situations that are annoying to watch or lead to poor outcomes. Personally I found these situations painful to watch and lamented some of the characters decisions but it's not like this is objectively bad.

The animation not amazing. There were quite a lot of cgi crowds with a crowd sometimes constituting of only 3 people. They're never present for long though and are easily ignored. Overall the animation was adequate for the story and managed to portray the parasites well enough but it's not an animation that you'll watch for the story. The music was pretty good and the main OST was very suitable.

Overall this is a pretty good anime with a nice story and interesting philosophical elements. It has good characters and adequate animation. If the idea of extra-terrestrial parasites infecting and killing people sounds remotely interesting to you then this is probably worth a shot.

Reviewer’s Rating: 7

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Nov 23, 2024

Ouimerci

Not Recommended

Funny

TLDR: overrated and underwhelming anime. It's not terrible per se, it's just extremely uninteresting.

Sadly this anime is very overrated, to a point I don't get why people were hyped at all.
The best description for me is "underwhelming". Nothing is actually interesting past the first 2 episodes. Most fights in the second half involve characters you just met and have not attachment to, whatsoever.

The most tensed episode is the last one... And it's just extra, unnecessary drama that brings nothing new to the story.

The rest is either predictable, unnecessary or underwhelming. When a major death happens, the animation and direction makes it look like a slice ... of life anime.
The fights themselves are the best part, but are still unoriginal.

Reviewer’s Rating: 2

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