might've asked this already (prbly 100 other topics like this too)...
So, any dark seinen
Those that ive read:
Parasyte
Zetman
Vinland Saga
The Hour of the Mice
Shamo
Gantz
Eden
Historie
Berserk
Ubel Blatt
and ill throw in Claymore even tho its shonen

You forgot Elfen Lied.....

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I suggest everything by Takahashi Tsutomu, especially Jiraishin and the Skyhigh series.

Also:
Monster
Basilisk
Battle Royale
Blade of the Immortal
Hellsing may float your boat as well

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"When we remember we are all mad, the mysteries disappear and life stands explained."
- Samuel Clemens/Mark Twain

Second Monster and Battle Royale.

Since "dark" seems to be used pretty broadly in your examples (I almost take it just to mean "has a serious tone" from the inclusion of The Hour of the Mice and Historie):
Nijigahara Holograph <-Read this.
Himizu
Vagabond
Pluto
20th Century Boys
Akumetsu

There's a bunch more, obviously, but really just take your pick.

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- Akira
- Domu
- Bradherley's Coach
- BLAME! (and just all the manga from NIHEI Tsutomu)
- Dragon Head
- Zashiki Onna
- MPD Psycho
- Leviathan
- Kurosagi Corpse Delivery Service
- Mail (maybe...)
- Barefoot Gen
- The Drifting Classroom
- Cat Eyed Boy
- Scary Book
- King of Thorn
- Metro Survive
- Mushishi (somewhatly...)
- School Zone (don't know if it can be consitered Seinen tough...)
- Tokyo Tribe 2
- Variante (I dont know if it can be consitered Seinen or not tough)
- The Yagyu Ninja Scrolls
- Onikiri Jyuzo
- Black & White (kinda...)
- Uzumaki
- Gyo
- Junji Ito's Museum of Terror
- Falling
- Ichi the Killer
- Homunculus
- Voyeur
- Crying Freeman
- Bestia
- Strain
- Wounded Man (i think...)
- Sanctuary (i think...)
- MW
- Ode to Kirihito
- Mantis Woman
- Manhole
- Gunslinger Girl
- Garouden (maybe...)
- Kamikaze
- Kurozuka
- Sidooh
- Alive!
- Blue Heaven (i think...)
- Jiraishin (i think...)
- Skyhigh
- Freesia
- Keep on Vibrating
- Uncivilized Planet
- Tropical Citron
- A Revolutionist in the Afternoon
- Tokyo Akazukin
- Kilico (i think...)
- Color of Rage
- Ghost in the Shell
- Reiko the Zombie Shop
- Japan
- King of Wolves
- Path of the Assassin
- Samurai Executioner
- Shaman Warrior (i think...)
- ChunChu
- Old Boy (i think...)
- Narutaru
- Lady Snowblood
- Devilman
- Devilman Lady
- Violence Jack
- Mao Dante
- Shin Angyo Onshi
- Island
- Zombie Hunter
- Twilight of the Dark Master

And i'm sure theres more that i missing here. I'll see about posting some more latter on sometime.

Togari-It is Awesome!!! Must Read!!!


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Alive!
Astral Project
Dead End
Eternal Sabbath
Freesia
Goth
Holy Land
Homunculus
Kurosagi
Lament of the Lamb
Liar Game
Planetes
Priest
Real
Rose Hip Rose
Team Medical Dragon
The Island of Hoozuki
The World Is Mine
Threads of Time
xxxHolic

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