Spinoza has been printed in 7 issues of Photo Japon, from december 1985 to june 1986.

Each issue contains a whole chapter, printed on one page. The format is that of a contact sheet, with the pages shrunk to fit on a single page.

Manipulating a demon with a worm-eaten body, the girl exterminates all sinners!! Accepting requests from the families of victims killed unreasonably, boys and girls are set on continuing to kill the sinners. They are responsible for this business without knowing when it will end, but also unable to live a different life, today also they open the curtain of revenge

An audiophile jumps to his death, meets something on the way down... and ends up crawling away from a pool of his own blood.
An unmotivated music high school student (our main protagonist) vs. a speeding truck meets the same fate in front of his friends.
Now those two must kill each other "in order to understand the joy of living", as proxy, with the power of classical music incarnated.

From AnimeWaves:
Touko's life seemed so ordinary, until she got that call... At the scene of the accident, by the puddle of blood, a young maid appeared... could no one else see her? And then, around the corner, a cry for help from a silver-haired boy... The veils are being lifted and the truth is being revealed!

From Japanzai:

In the edges of this world, demons known as "Pagans" lurk. Pagans are born when the souls of the recently deceased fall off the path to reincarnation. The reincarnation ceremony must be performed under moonlight, and so cannot be performed inside a city like Faith-Dehli, overly shrouded by both constant mist and thick smoke.

The Twanbach Funeral Service Company specializes in hunting these Pagans, especially those that attack while Twanbach delivers recently deceased bodies to the reincarnation ceremony—because there's nothing Pagans desire more than freshly dead human bodies with the souls still slightly attached.

Reginald, a 100+-year-old vampire who looks like he's 20, gets scouted by the Twanbach Company owner's mysterious twin daughters, Vanessa and Veroinica Twanbach. But first, they'll hunt Reginald a little, to see how far off the path he's fallen...

From MangaHelpers:
One day, Son happened across a woman, named Shue, that he had loved as an older sister when they were young. It looked like it was the same woman, with the same scars, but Son had thought she was dead. In fact, she was a reanimated corpse, resurrected by a young girl named Fuu to work as her minion. Son becomes Fuu's follower, determined to find a way to return Shue's soul to her body so that she might live again. However, Son doesn't know what he's gotten into with Fuu, though, as she ends up in conflict with many other practitioners of her arts, using Shue's reanimated corpse to do things that Son would rather have never seen.

From MangaHelpers:

"The Sixth Dimension Experiment." This experiment, in attempting to open one of the eleven dimensions in our reality, the sixth dimension (Secht), resulted in a catastrophic explosion that killed 110 million people and left 12 countries in ruins. The originator of this experiment, Himeka Yuki, bearing the total responsibility for the failure of this experiment, has been banished from reality for eternity. In response to this event, the world leaders in sciences formed a monitoring agency known as "Zeien" to keep control of all scientists and technology in order to prevent another Sixth Dimension Experiment.

10 years have passed since the incident. Takaomi Yuki, the younger brother of Himeka, notices a change in the "Time Machine Destination" that his sister has given him before her banishment. Suddenly, the device summons a lively girl armored with metals he has never seen. "Takaomi-san! To save Earth, pull out your lance and ride me!" To uncover the truth, the two will begin an adventure that crosses time and space. [DrCoke]

From Animeraider:
When 16 year-old Haruna runs away from an arranged marriage, her parents force her younger twin sister Wakaba into the marriage instead. But while Haruna ran off with a boyfriend, Wakaba has never even been kissed. How will a high school girl survive going from nothing to full on marriage with no steps in between?

This is oneshot of Tokyo Ghoul.

The manga consists of nine entirely separate short stories set in World War II, each reimagining a famous fairy tale with the European theater of World War II as a backdrop, often with poignant results.

(Source: Hokuto no Gun)

From Fairgame:
Haruka is an unlucky highschooler but one day she grab the happiness. She is going to get married with her fated husband, Masayoshi. He had been married once before but he is serious and kind, and supposed to make happy family life but then...

Dialogue-less oneshot.

An anthology of short stories from 1974-1980:
- Chuck Check Chicken
- Tokyoo Chang Pong
- Shincho Senki
- Good Weather (part 1)
- Good Weather (part 2)
- Ai no Kaikaku 2 Chome 3
- Virgin Shadow
- Katsu Kare
- So What
- Ame Lingo (part 1)
- Ame Lingo (part 2)
- Boogie Woogie Waltz (part 1)

Makoto Hayakawa, who is called Shin, is a third-year high-school student about to take entrance exams. He hasn't decided what to take for college yet. Compared to the other kids, Shin is a bit of an oddball. The neighborhood he lives in, M City of Tokyo, has three massive structures called "Reactors".
One day, a mysterious girl crosses his path, and in front of those reactors their fateful first meeting takes place...

Collection of short stories from 1975-1978:
- Kazoku
- Suka to Sukkiri
- Shusei Sanchi no Yuki Chan
- .....Ga Chyun
- Highway Star
- Tenmoo..... Nishite Morasazu
- Tsuya no Atosaki
- Seisoo
- Ashita no Yakusoku
- Sayonara no Omiyage

Reiko finds a starving mysterious animal that looks like a cat with wings. To the girl's surprise this cute animal names itself a space salesman that would sell advanced technology to humans for just a bit of hahise, which is abundant on Earth. But what is hahise? Would you pay it for a machine that can copy anything?

Unfinished space science-fiction manga by Otomo Katsuhiro.

This one-shot was a short extra in a guide book for a Sirens game. A mysterious siren out at sea drives fishermen to madness.

In a world where demons have haunted humans since ancient times, Rose and Marie are on journey searching for their missing brother while at the same time following in his footsteps as a hunter

In the year 2022, Kazamidori Aki works at the Time Travel Research Facility with her assistant Miyama. They use a technology called Aston that has scanned every detail of the city for the past twenty years and recreates the past exactly as it appeared into a client’s mind. This process called the In-Brain time travel allows the user to visit his past. But because it is only in their mind, they are unable to change anything in the present so no time paradoxes occur. Aki uses her services to help those who made mistakes in their past and help them change their ways. There is something odd about Aki’s past that makes her very unique and she has to deal with the skeletons in her closet.