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Trepanation is the procedure of drilling a hole in the skull. It is said to increase the blood circulation and improve pressure inside the skull. It is also said to bring out a person's sixth sense, the ability to use ESP, see ghosts, move objects with one's mind. This is speculative fiction based on the concept of trepanation.


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Associated Names

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Latest Release(s)
v.14-15 (end) by Illuminati-Manga (1175d ago)
v.13 by Illuminati-Manga (1372d ago)
v.12 by Illuminati-Manga (1430d ago)
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Status in Country of Origin
15 Volumes (Complete)

Completely Scanlated?

Anime Start/End Chapter

User Reviews

2 topics, 14 posts
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User Rating
Average: 8.3 / 10.0 (708 votes)
Bayesian Average: 8.23 / 10.0
 25% (176 votes)
 26% (182 votes)
 26% (185 votes)
 12% (85 votes)
 6% (42 votes)
 2% (11 votes)
 1% (9 votes)
 1% (9 votes)
 0% (2 votes)
 1% (7 votes)

Last Updated
January 26th 2015, 1:18pm PST



Category Recommendations





Original Publisher

Serialized In (magazine)
Big Comic Spirits (Shogakukan)

Licensed (in English)

English Publisher

Activity Stats (vs. other series)
Weekly Pos #783 increased(+3)
Monthly Pos #639 increased(+28)
3 Month Pos #705 increased(+163)
6 Month Pos #791 decreased(-45)

List Stats
On 1346 reading lists
On 1161 wish lists
On 1029 completed lists
On 89 unfinished lists
On 336 custom lists

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Forum Posts
I have a question 1543 days, 9 hours, 24 minutes ago
Hiatus OVER 2078 days, 17 hours, 1 minutes ago

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User Comments [ Order by usefulness ]

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Rating: 7.7 / 10.0
by butako chan
April 17th, 2015, 10:36pm
What a trip. Half the time I felt like I was tripping out on drugs. The concepts tackled within the manga are both so foreign and familiar at the same time. You feel like you can connect and follow the story, but not without some extrapolation and thinking on your part.

... Last updated on April 17th, 2015, 10:38pm
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5 volume to many   
Rating: 8.0 / 10.0
by kiriee
April 7th, 2015, 8:24pm
if you read 21th century boy you know what it mean, manga like this deal a lot with a past, so it kind of hard to drag it long because when they introduce someone new it just strange it was never mentioned before, it was suddenly popup sure you can force yourself to explain it, but that strange feeling will always linger.

Anyway it was good while it last, the ending was just okay I think it somewhat explain contradiction in the character expression/feeling, a bit fucked up if you mind. Definitely worth reading if you're into something unique.

... Last updated on April 7th, 2015, 8:25pm
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Something Else   
Rating: 8.0 / 10.0
by Karichan10
February 11th, 2014, 11:24pm
I was drawn into this manga and pulled all the way to the end. I don't know the meaning to it, but it was intense and fun and obnoxious. It was all sorts of feelings. I recommend it for anyone who needs something to keep their mind going. It is not something I will forget. Oh it really got me laughing and mumbling absurdly until the very end. I dare ya to try and read it all the way through... then let us know XD
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Kinda disappointed   
Rating: N/A
by gibble
October 19th, 2013, 11:43am
I agree with the last two users, especially Mizura, they pretty described exactly how I felt.

I loved it when I first read it. It was fresh and interesting. I also love how author displays raw emotions. However at the end of the day, there's really nothing else going for it. I don't care about any of the characters. I'm not saying anything is bad per se. To me, it went from AMAZING to just alright....and that by itself is the disappointment imo. It just felt like the author underutilized a rather fascinating concept. A pity really...
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Little to add   
Rating: 7.0 / 10.0
by Venatius
October 5th, 2013, 2:33am
By and large, reviewers like Mizura have this manga on the nose. There is, for those who may have sought it out based on category tags, one thing I would like to add: This truly is one of the relatively few cases where the direly overused "Psychological" category tag is in fact well and truly applicable. It seems people tend to use it for any manga where a character... thinks. In this case, it's actually a primary, focused theme (in fact, probably THE primary theme).
Anyway, my opinion may be a little more charitable, as I rather appreciated the use of really intense one-on-one interaction scenes as the primary drama and catalyst for plot, and the way it shucks the somewhat cliche direction the plot initially seems headed for. But ultimately, there's a lot of subjective fluff, head-up-own-backside "artiness" for its own sake, and wrist-tossing internal melodrama that kind of hampers that, even if it's still fairly intriguing. The story could easily have been shaved down to half its length with better pacing and less navel-gazing and lost no dramatic impact. It teeters on the verge of what I'd call pretentious, but that the same author gave us Ichi the Killer gives me a bit more faith they aren't completely up their own backside. If nothing else, it's a gutsy series unafraid of taking risks.

... Last updated on October 5th, 2013, 3:16am
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Excellent concept, but lacks real meaning   
Rating: N/A
by Mizura
September 14th, 2013, 10:11pm
The story's concept was extremely interesting, and the various situations were quite entertaining to behold, but I felt that the author ultimately went for the shock factor without much real psychological content. The series somehow ends too soon, with only a few "cases" in total, so you feel it doesn't really fully explore this otherwise extraordinary ability, and the "cases" that do get resolved are presented in a way that will shock you at first, but may make you feel "eh?" after thinking about it some more.

In the end I walked away without any real insight into the human condition, just a bunch of over-dramatized nutcases. If you don't read it for psychological insight though, this is an extremely novel manga with a level of shock-factor entertainment that you'll rarely find elsewhere.
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Rating: 10.0 / 10.0
by jojalee
July 19th, 2013, 5:11am
Homunculus is one of the most amazing manga's I have ever read. If you're into psychological manga this is for you. By an amazing mangaka, Homunculus is certainly one of my all time favourites.
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Rating: 9.0 / 10.0
by irelia
January 19th, 2013, 8:32pm
Oh wow, awesome..The trepanation, human natures, Nakoshi's visual when using the power, psychological explanations. This manga really interesting..
Spoiler (mouse over to view)
Warning for you who can't endure yaoi things, this manga contain yaoish scene on some part..

... Last updated on January 21st, 2013, 12:19am
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One of the best psychological manga   
Rating: N/A
by emkat
December 31st, 2012, 2:55pm
At around volume 9 it got bad because it seemed like he was just trying to reduce the drawing workload. Then it picked back up again. The tone of the manga changed completely after he met the teenage girl, and then it just got different and weird. The themes were good, but I would have rather had him stay on that storyline instead.

His comment in volume 11 about the forms was a good monologue. The story changes from a trying to solve homunculi concept to him trying to find himself out. It makes the story deeper but less interesting.

I like how he gets called out for his self-pity too. He became what he didn't like about others, but he was self-righteous about it. Best moment in the series.

The ending is also absurdly hilarious

... Last updated on December 31st, 2012, 2:59pm
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Rating: 9.9 / 10.0
by whitespade
September 11th, 2012, 8:20am
this manga produce a lot of emotion in me. revulsion, disgust, mirth, alarmed, frightened, depression, melancholy etc. and enlightenment. that's the best part about this manga, enlightening me about myself.

i can't really further describe this manga in terms of plot, characters, art and other literary device, though it excel in any and every way they cease to matter as they are just the vehicle to deliver those emotions and those revelations straight to the readers.

just read this, and you will understand.
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