The “Tokyo Loop Line Duels” were a system established to assist the reconstruction and development of post-WWII Japan. They were a battle for the main artery of Tokyo, the Yamanote line, as all sides traded blood. After a long stalemate, the threat of conflict looms again with the construction of the new Takanawa Gateway Station. Yasuda Koinosuke, who is in charge of Kanda Station, throws himself into the fray for the survival of his town.

When Tokyo ESP meets Ga-rei...

In post-apocalyptic Japan, a nameless mahjong player ascends a massive tower, facing formidable opponents in life or death gambles.

Strange murders are happening in Tokyo. Due to liquid evidence at the scene, the police conclude the attacks are the acts of man-eating monsters, ghouls.
College buddies Kaneki and Hide come up with the idea that ghouls are imitating humans so that's why they haven't ever seen one. Little did they know that their theory may very well be reality.

Note: The prototype chapter won the Young Jump 113th Grand Prix award in 2010.

This is oneshot of Tokyo Ghoul.

A redrawn variant of Chapter 1: Tragedy.

In Tokyo, an unchanging despair is lurking.
Mysterious man-eating beings, ghouls, run rampant in Tokyo. Living hidden during everyday life, the existence of ghouls, whose true identities are shrouded in mystery, permanently terrorizes Tokyo's residents.
At CCG, the sole institution that investigates and resolves cases related to ghouls, Haise Sasaki has been assigned a certain mission. While dealing with the unruly four problem children known as "Quinx", has Haise's days of suffering begun?

In the 2020’s the Japanese female culture was extremely corrupted in the eyes of the first women prime minister. To bring back the beauty of Japanese femininity, she created the Amazon Academy, a girls-only school, on an artificial island isolated in the middle of the Pacific Ocean.

Amesu Kumi just transferred into Amazon Academy to investigate the death of her older sister, Towa, who also attended the school until she died in a shroud of mystery. The only clue she has is the name Burai Sachiko left in Towa’s cell phone. How could Kumi have known that the school literally turns into a battlefield when classes are over; where petite girls beat each other senseless in order to survive?

An up-and-coming genius throws down his gauntlet! Frenetic & violent SF buddy action!

Meet the high school girl duo Line and Ann! Their job is to crack down on evil illegal aliens living on Earth, as agents of the Planetary Immigration Bureau!

High school girls X aliens X shootouts! Get your dose of violent sci-fi buddy action right here!

With the destiny of searching for a bride, the youkai teenage boy came to Tokyo from a small island: Hanzou. A maiden who develops a youkai-attracting constitution at 16: Ichijouji Mei. With the youkai's heaven "Tokyo" as its stage, Girl-Meets-Monster love comedy.

Year 20xx. In various parts of the world, there are gates that connect to another world. There are tens of thousands of demi-humans and monsters living in Tokyo alone and various services have been established to accommodate the residents from the other world. One such place is the real estate agency called Ebisu-ya. (Source: Mangaupdates)

Ayase Minori is a new student entering Houjou Designer's College. She has had her design "Daisy" stolen by a top-class designer Hinagata Eiji when she was 5 years old, and Minori had sworn to the fact that "I will not fall in love before I can beat Hinagata Eiji!" However, her meeting with Himemiya Akira almost made her forget her old vow... while Akira is Hinagata Eiji's only-son!

From Dan of Population GO:

"Based off of the video game of the same name. Humans have all been killed and now animals live in the cities that once housed humans. This oneshot follows the conflicts between animals in Tokyo."

The eccentric Dr. Tamaki is doing brain research. Hashi, 19 and a half, has a small fragment of a car that remained in his brain after an accident, and since then he can't help but say out loud everything he thinks and feels . Hana, 21, has unexpected orgasms anytime, anywhere, even in public. The brain of 6 year old Mari cannot perceive the people around her, she lives in an isolated world where there is no other human being apart from her. Hideo, 10, says he has "super powers," and can "get in touch with aliens and God."

From Chibi Manga:
"Yu-chan I’ve been wanting to see you this whole time, I’m presently going to Tokyo..."
Mugiko is a very energetic girl that was raised in a rural agricultural village within the mountain area. In order for her to see Yu-chan, who she was extremely close with when they were children, she transfers to a school in Tokyo. It has been three years since Mugiko has seen Yu-chan, but when they meet each other again he treats her coldly. Mugiko is shocked by this, but a very kind prince type boy appears…?!

Also includes the following:

Countryside Girlfriend
A continuation of Toukyou Kareshi told from Reigi's point of view.

Tatami 4.5 Mats Lovers
Ume indirectly saves a guy from being beaten. The guy turns out to be Ninomiya Hikaru, a rich guy who later transfers to her school. He tries to get Ume to fall in love with him, but Ume wants nothing to do with him.

A story about beings called "Kigo" and a boy who can see them.

Itsumi is a girl who moved to the city with the dream of becoming a cellist. One day, caught by the sound of her music, Warren, a mysterious boy, comes in her room through the window. What does fate have for them after this extraordinary meeting...?

"In Tokyo, anyone can become the protagonist of a love story."

Nagao Kanji has recently moved to Tokyo, where he now finds himself uneagerly working at a small advertising firm. He reconnects with an old friend from back home, Mikami Kenichi, a medical student from a wealthy household who never lacks female company. For years, the two have shared a crush for their childhood classmate, the kindhearted and innocent Sekiguchi Satomi, who now also lives in Tokyo. Mixing things up is Akana Rika, an infectiously cheerful girl working at Kanji's company who decides that she will call him by the nickname of "Kanchi."

Tokyo Love Story is Saimon Fumi's masterpiece manga about the relationships between these four young adults living in bubble era Tokyo. It was adapted into an extremely popular TV drama in 1991.

Takemichi is a 26-year-old unemployed virgin who learns that the girl he dated in middle school, the only girl he ever dated, has died. Then, after an accident he finds himself in a time leap back to his middle school years. He vows to change the future and save the girl, and to do that he aims to rise to the top of the Kantou region's most brutal delinquent gang. Winner of the 44th Kodansha Manga Awards for best shounen in 2020.

The manga won the 44th Kodansha Manga Award for the shōnen category in 2020.

This is a sweet and heartwarming love story, told from the different viewpoint of the two young lovers, a girl named Chizuru and a boy named Yudai. They mean well but cannot seem to succeed at love. They want their relationship to succeed but a combination of uneasiness and lack of self-confidence keeps them from advancing to the next step.

Sometimes, it takes an unexpected third party to intervene in order to make two people realize what is right in front of them. That is exactly what happens in this story.