It has been decades since labyrinths first appeared in the modern world of Japan, bringing with them monsters and related catastrophes. With this brought many changes; the biggest one being a new profession called 'Adventurer' and the monster cards they use to summon their own monsters to fight and conquer labyrinths with.

Kitagawa Utamaro, nickname Maro, is a mob highschooler who becomes an adventurer due to being incited by a former friend of his having sudden social success among their peers simply by becoming an adventurer himself.
However, things aren't quite as easy for Maro. Just becoming an adventurer in name only isn't enough for him to gain his spotlight, giving him no recourse but to actually tackle labyrinths with the peculiar and not very versatile monster cards that he barely manages to scrape up.

After a tear in reality pulls Kagari Shuya into a white room he discovers a futuristic interface for reincarnating in a different world. After looking through the different races and skills he unlocks a new race, Lucivault, a type of vampire with none of its characteristic weaknesses. All set to start his life in a new world, Shuya is confused to discover that he is enveloped in darkness. As it turns out something went wrong when he was transported and instead of appearing where he was supposed to, he appeared in an underground cave. Shuya faces untold dangers, runs for his life, before finding his way out of the underground world. After escaping he meets his Shishou and begins to learn to fight with a spear. There is also a cute black cat named Rollo.

From a caste based high school, bottom-tier Shinji Naomi is caught up in a summon of his class to a different world. However, as soon as they arrived the king said, "This guy is unnecessary because he only has clumsy skills " and it is concluded that he is to be forced to administer the orphanage, which no one wants to do. Unfortunately for the orphanage his skills were cheat skills that cause the girls to cling to him.

In order to "defend" the girls that depend on him, he must operate the orphanage while overcoming the powerful people, authorities, and former classmates that surround him.

A little girl gets sent to another world where she does her best.

Web Novel: https://ncode.syosetu.com/n8991ct/
Light Novel: Bookwalker

A spin-off of the series “Tondemo Skill de Isekai Hourou Meshi” told from Sui's perspective.

There’s a legendary Bishoujo Game that has become popular among Japanese gentlemen.

Its name is “ Magical★Explorer” or Magiero for short.

The game’s protagonist has a cheat-like power with12 different beautiful heroines to flirt with, including additional 12 heroines from the DLC, a harem of 24 beauties. I have become that protagonist!………………Not. Instead, I have become the third-wheel character who always laughing like an idiot next to him.

Of course I was in despair at first.

Of course. If I am the protagonist I could have all 24 heroines for myself along with unparalleled cheat power. However, since I am the third-wheel there’s no heroine that would lay their eyes on me.

But now I couldn’t care less about the protagonist and his heroines. Why? Because I discovered magic. While I was using it, I have become interested in it. I want to master it. I want to become the strongest. Thus I have decided.

I would abandon half my role as a protagonist’s friend to train my magic and then I would beat the hell out of that cheat who can solo the Demon King.

I reincarnated as an evil god.

Ira Takuto succumbed to illness at a young age and ended up reincarnating in a world that resembled the strategy simulation game, 『Eternal Nations』, of which he loved playing when alive. What appeared in front of him was Atou, a girl belonging to the evil civilization that he used to play as, 「Mynoghra」. The two of them decided to create a new country in this world once again.

Am I "necessary" in this world? What is the true nature of the person called "Muzina" who flies in the sky with a sword on her back in the midst of ordinary life?
What is man, what is society, what are human rights, and what is happiness?

Waking up, Kim Hajin finds himself in a familiar world but an unfamiliar body.

A world he created himself and a story he wrote, yet never finished.

He had become his novel’s extra, a filler character with no importance to the story.

The only clue to escaping is to stay close to the main storyline.

However, he soon finds out the world isn’t exactly identical to his creation.

Sequel to Re:Zero kara Hajimeru Isekai Seikatsu: Dai-3 Shou - Truth of Zero.

A story about a cat reincarnated in a different world where there are no cats.

The hero, Fried, confronts the demon lord with his student, Lyle. Fried killed the demon lord after a ferocious battle. “I'm going to put an end to this war!” Just as he was about to finish off the demon lord, he is betrayed by his student who attacked from behind. Fried, who was supposed to be dead, wakes up next to a demon girl who calls him the demon lord for some reason. It seems that Fried has risen as the new demon lord and will now have to protect the demonkind under his command while fighting his former comrades

Webnovel Link: https://ncode.syosetu.com/n0087ep/

The infamous leader of the assassins known as the Shadows, Raon, had lived his entire life as a dog on a leash.

However, through a twist of fate, he obtained a new life—as the grandson of Glenn Zieghart, the Destructive King of the North!

He prepares to use the Ring of Fire he still possesses as an infant to begin cultivating when he's diagnosed with the Curse of Frost.

With the odds stacked against him, will he be able to finally stand on his own feet and live life by his own will, to become the strongest swordsman on the continent?

“I will slay anyone standing in my way of revenge…
even if it is a god.”

The internet is full of rumors about the Neet and Hikikomori genius gamer siblings Sora and Shiro. The two go as far as to refer to the world as a "shit game", but then one day a young man calling himself "God" summons them to a parallel universe. There, God has forbidden war, and "everything is to be settled with games". Yes, even the national borders. Driven into a corner by other species, the 'human species' is down to its last city. Can Sora and Shiro, these related failures of society, become the saviors of humankind in this parallel world?

From ANN:

Guts, known as the Black Swordsman, seeks sanctuary from the demonic forces attracted to him and his woman because of a demonic mark on their necks, and also vengeance against the man who branded him as an unholy sacrifice. Aided only by his titanic strength gained from a harsh childhood lived with mercenaries, a gigantic sword, and an iron prosthetic left hand, Guts must struggle against his bleak destiny, all the while fighting with a rage that might strip him of his humanity.

Warning: This manga is for mature audiences only, since it has sexual content and graphic violence (gore, blood, rape, etc). Definitely not for the weak hearted.

The 1988 Prototype chapter won a prize at the Comi Manga School Miura attended and the main series won the Tezuka Osamu Award for Excellence in 2002.

A male engineer transmigrated into another world, and became a prince. This place strikingly resembles the Middle Ages of Europe, but at the same time, it seems kind of different? Witches truly exists, and they even possess magic powers! Magic powers are productive forces! Save the witches, liberate the productive forces! Open map, fight demons, break conspiracies, climb up the science and technology tree, and open the path of hardcore ‘farming’!

Story centers on a boy named Tokio, who lives alongside other children inside a beautiful wall. One day, Tokio receives a message that says "Do you want to go outside of the outside?" In a heaven that has begun to tear itself apart, a group of boys and girls begin their adventure.

Yuna, a 15-year-old girl, started playing the world's first VRMMO.
She has earned billions of yen in stocks and confines herself in her house playing the game without going to school.
Today, a major update has arrived and she obtained a non-transferable rare bear outfit.
But the equipment is so embarrassing that she can't wear it even in the game.
Furthermore, when she answers the survey regarding the new update and relaunches the game, she appears in an unknown forest in the bear outfit.
Where is this? Email from God? A different world?
If she wears the bear outfit she's a cheat, if she takes it off she's a normal girl. Her adventure starts just like that. Yuna began doing whatever she wanted.

In modern Hokkaido a brown bear has appeared near an elementary school, so a member of the local hunters' association is dispatched to exterminate it. However he gets killed by the bear and wakes up in a fantasy world, armed with only the Remington M870 shotgun he had when he died.

A story about three high school girls in the Cinephoto Club (Photograph + Cinema).