Humanity's greatest gym rat Hansol, lost consciousness during a deadlift. When he opened his eyes, he arrived at a different world. Monsters appeared in front of him, and all that he could see was protein...? "I'll flip this world by working out!"

After Rimuru's encounter with Shizu-san in the manga, he learns how to mimic a human form. However, the body...was that of a three-year-old child!? With chibi-Rimuru and his friends unleashed from the Great Forest of Jura, maternal instincts hit in the “Tensei Shitara Slime Datta Ken” Official 3rd Spin-Off!

Makia is a noble lady descended from an infamous witch. Thor, a boy who was raised with her and came from another world, is chosen to be the knight of the "savior". The two are forced apart and to see Thor once again Makia aims to be the top student at Magic School!

Yamada Takashi lost his life in the snowy mountains—that is what he thought, but he then appeared in an unknown place; another world that looked like the game he played. Moreover there are many things that he doesn't know... While puzzled, he still retains the strongest class ability and is relieved.

High rank magician, "Wise man" Marius is still living till today.

Hitoshi Kobe is a terrible student and an even worse athlete ... though he does have an incredible talent for creating Artificial Intelligence programs. Thirty is his best artificial intelligence program yet -- and, more important, the only girl who will talk to him. Hitoshi's life is forever changed when a freak accident brings Thirty to life ...

Three Years ago a Hero sealed a Hell Gate. The Seal has been weakening ever since, sporadically letting Monsters through. After a big Group of Monsters entered the Country through a Hell Gate, the profession of Heroes was needed again.
Touka Scott a small Radish Farmer in the southern Town of Cheza is prepared for sudden Monster Attacks. He built himself a hidden Pittrap with Bamboo spikes, to lure unsuspecting Monsters in if they ever try to Attack the Village. A Monster attacks and Touka tries to lure it into the Trap with freshly roasted Bacon, but the Monster dislikes this type of Meat. Thankfully the local Hero saves the Village from the Monster in the nick of Time. The hungry Hero tries to grab a bite of Bacon after vanquishing the Monster, only to stumble into Toukas Pittrap and Die.
After causing the local Heros Death, Touka is forced to take matters into his own Hands to protect the Region from attacking Monsters.

A hero with a production skill?? Akina Shoji, a salary slave, had a dream to open his own business. However, when he almost made his dream come true, he’s been summoned into another world with a “Cultivation” skill…

The stoy of an elf queen who got isekai'd from her world into our world. Her name is Lady Elfinn, our titular queen.
And a sweet boy who believes in the Elf supremacy. His name is Isuzu.
Their fates clash after Isuzu gets assigned to take care of Elfinn, and help her accomplish her task: To become the queen of the human world and to guide us into a better future.
In order to help her with their final goal he proposes...

To master the old ways of the S&M to conquer the world!?
What awaits them in the future!!??

Game strategies and bursting with cheats: a second life! The strongest boss in the history of RPGs takes the world by storm! One day, the Demon Lord Menas is attacked by the empress of the Noahic Empire and her Revolutionary Empire. In the face of a beautiful blonde girl, Alex, a mysterious sense of deja vu washes over him… This looks just like the prologue of the game “Resis-Noah” in my dreams! After realizing that he is the final boss of this world, he decides to fake his death so he can enjoy a new life. With his cheats in hand, the new dark hero strives for a life of freedom!!

“God is always watching you.”
“There is no such thing as God in this world!”

[A certain God is confused]
[Viewers: 1]

When the weird message appeared in front of me, I was reminded of my father’s words…
He was right.

A young man unfortunately died in the modern era, he reincarnated in another world under the name "Eldo," which also happened to be a world similar to a VRMMO game that he used to play in his previous life. However, it's a world where he knows the "basic skills." Eldo became a level 1 adventurer, playing as a "novice," but he knows the world better than anyone, and this is because of the "data he knows." Will the reincarnation in this world make him strong?

From Viz:

What do you do when a team of evil superpowered wrestlers from another planet threatens the health and safety of the Earth? Organize a team of GOOD superpowered wrestlers, of course! Kid Muscle, the son of legendary wrestler King Muscle, rockets to Earth and finds an evil wrestling gang called the DMP tearing the place apart. The punks on the DMP are the weirdest, nastiest, most outlandishly powerful musclebound freaks the galaxy has ever known. Kid Muscle's only hope: form a team that's even wilder. Lazy and cowardly, the Kid sure doesn't look like the universe's last great hope, but when something upsets him -like, say, EVIL - he busts out in muscles just like his old man! The only possible result is earthshaking, bodyslamming, ultimate-powered action that sends our entire planet sailing over the top rope!

Musashi is a teenager living under demon rule. As children, he and his best friend Kojiro made a promise, which is to become the greatest warriors in the world and overthrow the demons. But life intervenes, and five years later, he finds himself about to become a miner. Yet can Musashi truly be satisfied with a "normal" life?

An introverted Otaku was summoned to a Fantasy world, and successfully defeated the Demon King there. Just before the ritual to send him back to Japan was complete, the country's Princess dashed into the middle of the spell to be with him.

When they both opened their eyes, they realized they were transported to a Sci-Fi themed world than neither of them recognized. Working together, they must now survive in an unknown world and find some way to get home.

The great sage, Grameos, tired of his current life as a famous mage, decided to reincarnate as a young boy 200 years in the future. Before reincarnating, he places two magic restraint seals on his hands, so that he can hide his enormous magical power after he is reborn. His motto for the next life is "Hide my powers, don't stand out, and be free".

I’ve been reincarnated into a world of strategic gaming where I acquired number 1 Rank!

I thought I would be reincarnated as a warrior in a gaming world that I know of, but I found myself to be a rogue lord who dies in the prologue! And I only have one day left before I die due to another country’s invasion..!

Use all your wits, courage, and gaming knowledge to face your destiny!

It’s a strategic fantasy where you risk your life to turn the tables!

An ordinary middle schooler, Lee Sungmin, is summoned to this world called ‘Eria’.
He endures for dozens of years with no talents or powers, and makes it through all kinds of hardships to survive, but dies miserably in the end.
However, before he dies, he regresses back to the past after obtaining the ‘Stone of the Past Life’ by chance, and gains the opportunity to start his life anew.
Yet, he still lives a life without any talents, having nothing. Although he can’t approach the geniuses around him due to the ‘wall’ surrounding them, as well as feeling inferior, he moves forward step by step with firm determination, never giving up. “No matter what, I’m going to live a better life than my previous one even if I have to struggle!”

A man who was enjoying an evening drink got transferred to the body of Liam, the fifth son of a nobleman from another world.

"I spent easy days practicing the magic I had longed for, and learned not only attribute magic, but also how to summon spirits, obtain powerful familiars, and ended up mastering even the most difficult magic!"

He became an adventurer aiming for independence from his parents' house, which was scheduled to fall, and before he knew it, he became a higher-ranking aristocrat rather than one of the best magicians in the world.

Pocket Monsters stars a Pokémon Trainer named Red and his rude Clefairy. It is chiefly a gag manga, using crude humor and slapstick.
The series diverges somewhat from the Pokémon video game and anime canon: most Pokémon can speak human language and regular animals (like birds and fish) appear alongside Pokémon. Evolution is also significantly different in Pokémon Pocket Monsters: Pokémon can evolve at any time, and they are also able to reverse the evolution.
-Bulbapedia

In a world filled with talking Pokemon, Red and Green compete with each other in a race to gather all the data needed for the new Pokedex! Bumbling Clefairy frustrates Red with its extreme incompetence and silly behaviour... however, sometimes Clefairy's bizarre ideas to work out in the most surprising ways!!
-Chuang Yi

The main character, Hazel (Maron in the original Japanese version), sets off to catch Pokémon after a scientist named Grandpa agrees to make a love potion if she catches Pokémon. Hazel is after the heart of a boy named Almond. Most of the Pokémon in the manga series can speak a human language. The manga's plotline has nothing to do with the original video games. Taken from Wikipedia.