Seigi, a martial arts trained middle schooler, often feels driven to protect the weaker people around him. One day, he defends a homeless man against some punks, and the man gives him a strange tattoo on his palm in return. The tattoo is a secret weapon produced in the arms race between America and the Serinistan Kingdom.
Seigi finds himself in over his head when a powerful girl, using the same secret weapon, violently pursues him in order to retrieve it. His skill at martial arts may not be enough to keep him alive, but will he be able to learn how to trigger the power of his tattoo in time?

Batoto: This is the story of a mangaka, a killer maid, and body swapping ramen, with a side of gratuitous violence and explosions.

Abel, a boy abandoned by his family because of the fear his unparalleled talent for magic evoked on them, was taken to an orphanage and taught magic by a former great magician.
Eventually, his ability far surpassed that of his teacher and after receiving an invitation from the magical society known as Chaos Raid he embarks on a journey with the fire hero, Maria and the water hero Daytona and later, the ash hero, Cain.
This is the story of Abel's childhood and adolescence before his reincarnation.

Yataro Sarumaru, nicknamed Saru, is an ace in the locksmith trade and is obsessed with girls. This (almost) average teenager is given a hardly ordinary mission which marks the beginning of his adventures!

Before you ask, it’s not an isekai.

Anyway, the MC is an ordinary peasant who becomes an adventurer after his sister gets cursed by a witch and he needs to find a cure. But the twist this time is that he only knows the skill of [Breathing]. Like, regular breathing.

Anyway, how will our hero fare in the endless dungeon, using only breathing techniques to push through, aided by his busty childhood friend who has no romantic interest in him?

Look, this is from the same author of that series where a Playboy becomes a Sage and gets two shortstacks to join his party. You know he’s going to find a way to make breathing overpowered, and you know he’s going to have a harem. Why are you even reading this synopsis if you already know it’s going to be one of THOSE stories? Why have you already added it to your follow list when you could read anything and receive a better value? Why are there thousands of delicious and nutritious foods around and you keep eating the dirty quarter pounders right outside the McDonalds dumpster?

From Manga Reborn:
Welcome to the 82nd Precinct, also known as the Crocodile Precinct, which is filled with cops that never let go once they sink their teeth into something.
Leading them is Hino Mika, a female cop who's as dangerous as she is beautiful. Follow her on her adventures in this sexy action suspense series.

A dramatization of the real life of Yaeko Yamamoto. Over 100 years ago, Yaeko broke traditional Japanese stereotypes, gender, and honor to become a gun-warrior in defense of her homeland of Aizu.

From DrCoke at MangaHelpers:
Boy meets girl, but in this case, the girl is part of a family specializing in fighting evil spirits. Kamishiro Renge battles evil spirits with the help of her assistant cat Tama. The boy is... just a boy. Yuta fell in love with Renge the moment he met her, but will he be able to keep up with her profession? Will she be able to lead a normal life with Yuta?

A couple of decades have passed since Ultraman last was seen in Tokyo, and his kaiju nemeses seem to have gone back into outer space. Former Ultraman Shin Hayata has forgotten that he ever wore the metal suit, though as Minister of Defense he still takes a keen interest in protecting Japan. His young son Shinjiro knows that his dad once worked with the SSSP (Science Special Search Party), but not that that explains how he came to have amazing strength and other seemingly supernatural abilities; as a moody teen he just thinks they make him weird. But then one day a dangerous alien comes back to Earth, and everything starts to become clear. Will Shinjiro don the suit and become the new Ultraman?

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world, exist huge humanoid weapon known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid and Adeltrud Olter: together they will aim to become Knight Runner, pilot of Silhoutte Knight.

Bonus stories following the convicts featured in Baki's death row inmates arc after the events of Baki's second manga. Released in the "Baki" series' 2018 shinsouban as mutual promotion with the anime.

Vampires have been defeated by Humans. A story about them wearing collars. Wait - you're mistaken, it's not like that!

Age 41, Oh Joong Seok. A man who did all kinds of misdeeds and put his life on the line for the organisation to gain the highest position. But who knew the end of his life would be so miserable… Joong Seok’s ‘virtuous living’ project starts now, one by one.

Her memories of being a military geek in her previous life awaken, and she remembers she’s in the world of an otome game she played in her previous life.

And what’s more, she’s what people refer to as a ‘villainess’.

In the game, the villainess is destined to face a destruction ending, but this girl is different.

If you don’t want to be destroyed yourself, you have to destroy them first!

In this way, our protagonist who is obsessed with recreating the power of modern weaponry using magical techniques by taking advantage of the magical talent bestowed upon the villainess, realizes it at last.

The heroine? The prince? Shaming her family? Being exiled from the country?

If only a bad end is destined for her, then she has to crush it through sheer firepower!

One day Ooki Taiju builds his courage to confesses to Yuzuriha, the girl he loves, when the sky is filled with a strange light. Everyone touched by that light is turned to stone. After a thousands years trapped in stone, he breaks out of his shell and starts to explore the world until he finds his old friend Senku, who was freed from his stone state half a year ago.

Taiju and Senku decide to team up and bring back the now lost human civilization, starting by investigating the true nature of the light that turned them all to stone thousands of years ago and how to fix the situation.

Note: Won the 64th Shogakukan Manga Award for the shounen category.

A story about a Maoshan Master fighting against demons! An invincible Maoshan Taoist meets a girl working part-time jobs who's in trouble

Chu Qing is a sword expert cultivator, who 300 years ago accidentally entered the fairy world. During those 300 he began his cultivation journey. At the time of reaching the realm of eternity, it was not expected that he would instead open the hall of time and space and return to earth at the age of 17 years. But when he saw the situation, it turns out it was not the earth he once lived in, but the world was reversed between the roles of women and men. How was his journey to find a way to return to the original world, and defeat and conquer the strong women in the world ...

Nicola, human, ends up in the Demon World where she is found by wandering trader, Simon. Unfortunately, humans don't seem to be appreciated all that much in the Demon World, but that doesn't stop Nicola from running her mouth all the time.

The 18-year-old Mitsuru Yaegashi arrives in Tokyo planning to become a professional illustrator. While searching for cheap apartments he suddenly gets wrapped up in in the Town Renewal Project, becoming part of the Fight Town. He fights his first fight against a boxer to defend the boxer's grandmother and prove him wrong. After becoming part of fight town he wants to leave but after registering there is a penalty fine and he will be charged by the police for the fight!

A story of an unemployed man that revives after 3 days of being dead. Follow his action-packed encounter with a large criminal organization.