Meet Sefiria. She may be just a baby now, but she holds a dangerous secret — she has memories of her previous life as a Japanese salarywoman. Anyway, yadda yadda yadda, she died, got isekai’d, bada bing bada boom.

Now for the meat and potatoes of things. After experiencing the hell of living in such a rigid society like Japan beforehand, Sefiria wants to avoid making that same mistake in her second life. That’s when she remembered a famous saying back in her previous life:

“At ten years old, you can be a prodigy. At fifteen years old, you can be a genius. At twenty years old, you’ll just be a normal person.”

While the new world she was born in considers adulthood to start at the age of 15, Sefiria has a repository of knowledge from her old life to help back her up. Can she become a prodigy at an early age, revolutionize her world, and ensure herself a slow life that any Japanese reader would love to self-insert into?

Being honest is good. Probably.

With Shuuji’s parents overseas on business, a maid has come to his house. She’s cute but she can’t keep a secret?! With her expressionless gaze, she thoughtlessly says the craziest things…! Living with this maid whose true thoughts are laid bare, a second year high school boy is thoroughly made fun of!

Tokonatsu Taichi took the summer Koshien by the storm as a sensational ace pitcher, with a full arsenal of pitches including a 98 mph fastball. But on the way home from the game, the team bus suffered a tragic accident and Tokonatsu Taichi lost his life... Only to be transported to a new world where all international conflicts are resolved by a game of baseball. Unfortunately, the country he landed in was the weakest, and had seen gradual loss of its resources and people to neighboring countries. Can Taichi turn their fortunes around?

Meguru Kaku is a normal high school student, except for the dreams he has about his previous life. One day, an unseasonal new student, Kotaro Kongochi, arrives. He is reunited with a friend from his previous life that he thought he would never meet, but something is wrong with him...?

The series ran in Weekly Shōnen Jump from 1988 to 1990 as Jungle King Tar-chan, and then from 1990 to 1995 as New Jungle King Tar-chan. It first appeared as a short prototype story in the 1986 Autumn Special as Tar-san (ターサン?).

At first, the series was a simple gag manga parodying Tarzan with single chapter adventures. At this time most chapters were only 7 pages in length and were usually about Tar-chan protecting the peace of the jungle, Jane, and his animal friends, often with comedic results. After Tar-chan began, Super Jump became a monthly publication, and Tokuhiro ended Ken-chan and Chako-chan in 1990.

Two years into serialization, the stories began to run 13-15 pages, New was added to the title, and the simple episodic gag premise were switched to a fighting manga premise. Although long battles and emotional development began to unfold, after the end of these battles, the series would return to its gag style, switching back to the fighting manga style with each new battle.

Although the story is called Jungle King Tar-chan, Tar-chan and his friends actually live on a savanna, and a jungle setting is never actually used.

Reiji Hashimoto, the clear-headed, ruthless protagonist who is extremely strict with arrogant women, hates his classmate Mikage Yakushiji, a typical arrogant girl. However, Mikage is a normal girl who is just in love with Reiji!!

A new romantic comedy depicting the quiet struggle between two people who don't understand each other!
(Google translate, edited)

Not a man is immune to Mikudashi Ibari's beautiful looks and perfect style... safe from gloomy loner Yonekura! A love comedy about a beautiful girl ruined by a problematic personality trying to prove her superiority through sexiness to a gloomy boy!

A boy has become a magical girl, Kazana Sho is going to become more feminine to get stronger...

Mimiel, a mysterious girl who fell from the sky, is taken in by Ren, a high schooler. She claims to be a fallen one-winged angel, stripped of her angelhood due to her inability to love humans. Ren decides to begin living with Mimiel until the day she knows love and is able to go back to heaven once again.

"Maybe I've been waiting for such a moment for a long time!" While being estranged by his daughter and being blamed by her wife, middle-aged office worker Iwashita lived modestly in his own way. This was his norm at least until he met a girl, Shiina, who suddenly appeared one day in front of him. She approached Iwashita as a 'customer' for "a meal for 20,000 yen". A story of a small escape begins with a painful and dazzling 15-year-old girl seeking her own value and a 40-year-old middle-aged man struggling between reason and desire.

Crow, the loyal butler of a villainess, realizes through a series of chance events that he has in fact been reincarnated into another world.

With a new perspective on life, he realizes just how badly he's been treated by this haughty, egotistical and prideful noble lady he calls his mistress until now, and boils with rage at the injustice.

However, after deciding to take revenge on her in a risque way, he comes to realize that she's a lot easier than she looks...

This is a story of how a reincarnated butler tames his villainous mistress in lustful ways, but ends up making her truly happy.

Official serialisation of the Twitter series Boku no Oku-san Chotto Kowai.

It follows the story of the parents of Shimizu-kun from Sotodura Danshi no Shimizu-kun.

In 1988 an enigmatic explosion which has happened in Venezuela caused some mysterious case called "Lost Life Phenomenon". Indiscriminate murder, mass destruction, vanishing of an entire city... Some who got involved in the case say they saw a giant... Fast forward to 1991 in Japan. This is a story about girls who end up piloting gigantic humanoid weapons called "JINKI" fighting against their fate.

This manga started out in 2002 and had 9 volumes published, the "Complete Edition" came out in 2011 and had 3 'large' volumes instead, JUM will be doing the latter.

The Koinobori yakuza family's souls are expensive commodoties, a source of great pride to those of the demon world's soul bank. But when the Koinobori heir, Ryuji, is born with a pure soul engrossed with fairies and angels, it's up to Maria to become his personal cupid and reform him so that he continues the Koinobori's lascivious family line!

Naoe-kun is a massage therapist at the "Smiley Boar" clinic. One day he gets a new patient named Erufuda-san, who turns out to be an Elf from a different world. All the junk food of this world has taken its toll on her figure. Now she'll try to lose weight with the help of her trusty massage therapist. But Erufuda isn't the only one from her world who's been affected.

Abel was a genius magician who held immense power in a world where the color of your eyes indicates how powerful you are. However, the strength that came with his amber eyes was so great, even his comrades looked at him with fear and contempt. He therefore decided to transfer his soul far into the future, hoping to find a paradise that accepts him. He would soon find out that people’s attitude regarding his eye color did change, but not quite the way he had imagined…

From mangaupdates:

Born into a wealthy family, she lost her mother at a young age.
She is Riona, a girl who was raised by a single father.
At the girls' school she attends, she has many friends and a special partner of hers,
She lives feeling a little lonely that her busy father has just left her house.

One day, her father bought a robot that she said was her "housemaid"
She witnessed the act of "Forty"...?

A girl who wants her affection and a robot who doesn't know her feelings.
A dramatic story of gems!

Minato is a college student who died in a plane crash and was reincarnated in a fantasy world. He was raised alone in the wilderness by his succubus mother, and now he tries to make his way as an adventurer

From MangaHelpers:
From the perspective of an alien planet with super-advanced technology and tiny (1/60th the size of a human) inhabitants, planet Earth was the perfect location to banish their worst criminals. Five of said criminals were sent to the planet to be exiled, attached to little critters like frogs and rabbits so they can never be fully active. Due to an accident, these five criminals managed to escape and attach themselves to five different girls that were nearby. The one responsible for the banishment of these five criminals now must detach them from the girls by mouth-to-mouth release.

Amai-san, the beautiful JK who lives next door, may seem cool, but in reality... only I know her sweet side?!