Edit: Ugh sorry about the title. matsumoto** it got autocorrected

Especially uncivilized planet, one of the best manga I ever read
The surrealism, innocence of main character, grittiness/rawness of reality made it so so beautiful
Other excellent works by jiro: jigoku no alice and wendy

Basically looking for poetic, experimental/avant garde manga with helpless characters against backdrop of harsh reality, surrealism, depth...I also like themes like corruption, mono no aware and unfulfilled dreams
homunculus is also a great example

I haven't read any of your listed manga except Homunculus, but it sounds like Nijigahara Holograph and Oyasumi Punpun are the kind of manga you're looking for - lots of angst, despair and symbolism. Asano Inio is always good for an existential crisis or two. 🙂

Yeah I love asano...I've already read everything by him though 😢

Have you read any works by Koike Keiichi? He's done some works of a psychedelic nature (so closer to Tropical Citron than the series you listed), but he's the closest I can think of to Matsumoto Jiro...

Also, Number Five might work.

I don't think there's a mangaka quite like Matsumoto Jiro.

i havent read any done by that author, but with what you explained you should definitely try Annarasumanara. there is nothing quite like this one, its definitely poetic

[img]http://24.media.tumblr.com/3b280fafb72cad0f718be64368e64ca7/tumblr_myylzmuiY41rw3pzao4_250.gif[/img]
Like educational manga? take a look at Ed U. Manga's list of manga here

Bump

Marie no Kanaderu Ongaku. Other stuff my him will fit more.
The World Is Mine Same.
Dorohedoro It´s a harsh life and you will like the art.
What about Jisatsutou ?
Battle Royale is very trashy in this version but you should like the R-rated nature .

I also read EU/US comics and am a librarian.
Manga-Masters, My ANN-Lists + Imdb

Might be a long shot, but I was reminded of Aku no Hana.

I second Marie no Kanaderu Ongaku, also.

Already read music of marie. One of my favourite manga
the world is mine looks perfect, thanks.
anything else? 🙂

It might be no news but I just have to mention YAMAMOTO Naoki.

Problems can be anything but a problem.

maybe one of the following
Majo
Mushishi
Ultra Heaven
Takemitsu Zamurai
Kinderbook
Hito Hitori Futari
Freesia too i guess and while you are at it might as well try Arigatou