Having survived an isekai for 17 years, 34 year old Ojisan (uncle) returns to modern day Japan. Takafumi, Ojisan's nephew, now gets to witness what throwing a die hard Sega fan into an isekai for 17 years does to various things and people, both past and present.

When Ivy was born into this world, she remembered her past life.
Remembering her preincarnation, she strove to avoid strife.
But fate curdled at the status check, when kids learn who they are.
For she had only one skill - Taming - and not a single star.

Ivy was weak from the start - at most, she could tame a slime.
Her parents hated her for it (apparently, being weak is a crime?)
Only one woman in her village would treat her as her own.
But after she "died", Ivy got the hint and ran from home.

She met a slime and named him Sora (she's a gamer?)
And such begins our story - of a small girl who's a tamer.
Yes, you may be scoffing at that tag called "isekai"
But you know the rules, and so do I.

(From NovelUpdates)

When I woke up, I found myself inside a spaceship.

I guess you guys think I’m talking nonsense here, but I also have absolutely no clue about what exactly happened to me.

I was really close to completely losing it, but fortunately, I managed to notice that this place was really similar to the world featured in a game I was playing recently.

Am I dreaming? Nope, it’s no dream. Maybe I actually got sent to a different world or something?

But didn’t those things usually involve getting sent to a magical world with elves, dwarves, dragons and whatnot?

In any case, I don’t know what caused this, but I guess I’ll just have to suck it up and live properly in this world from now on.

It’ll be okay. I got my trusty spaceship so I can probably make some money. It’ll work out! It has to!

This is the story of a man abruptly thrown into space along with his private spaceship. He runs around with it and saves damsels in distress along the way, flirts with said damsels, earns money as a merc-for-hire and uses his gaming knowledge to work his way into living freely and easily.

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.

He learnt the strongest martial arts only to be killed and be reincarnated as a rural village officer as Master Baek, The One Hit Teacher!

"They" are real... One month has passed since the Great Shizuoka Earthquake. Marine research organization JANSTEC has been conducting observations of submarine faults in order to uncover the cause of the massive quake. Yadorigi, a blind young man working as a sonarman, assists in navigating the manned deep-sea submersible when they make a discovery...

Kowata Makoto is an airhead with a bad sense of direction who just moved into her relative's house, but is that all? A manga about the coming of age of a witch in modern day Japan.?

The betrayed old man killer regresses! But… no one recognizes him?! “Then I’m the most powerful!”

Ken Takakura, a boy who is an occult fanatic who doesn't believe in ghosts, and Momo Ayase, a girl who doesn't believe in aliens, encounter overwhelming strangeness that transcends their mutual understanding...! An occult coming-of-age story!

Ronan lived a wasteful life filled with regrets. A second chance befalls him at the end of his futile life. He went back to the time when he was a ten-year-old child! For the people who sacrificed themselves for him, he becomes determined to live a new life.

If you want to live, find him. If you don't want to die, don't go near him. He is the greatest doctor and the strongest hero, the legend of the underworld--Under Doctor Haiji. Medical drama x heart-pumping action!

I "transmigrated" into a world I'd never seen before.

For thirty years, I believed I was living in a classic fantasy RPG.

I became a war hero, retired, and thought I was finally about to see the ending.

But...

Those thirty years were only the prologue.

It turns out the real story is about an academy?

“Make Me a Princess!”

One day, Kanbara Yuuma finds himself in a desperate situation when his younger sister, Ayane, blackmails him with a certain cringe worthy secret from his past.

Her demand? To secure her a spot among the “Hime 6,” the prestigious titles awarded only to the top six candidates in Himegasaki Academy’s famous general election.

Determined to claim a throne of her own, Ayane forces Yuuma to use his weakness as leverage, making him “conquer” her rival princess candidates and clear the path to her victory.

But winning over the school’s most dazzling girls, who have the entire student body captivated, is no easy task, and Yuuma struggles at every turn… Worse still, as he gets involved, he finds himself tangled in the increasingly complicated romantic entanglements of the princesses themselves!

With egos laid bare and love and scheming colliding at full force, this is the most chaotic romantic comedy yet, and the madness begins here!

The Demon Lord, who was once defeated in battle by a hero, was suddenly transported from the demon world to modern-day Japan due to a runaway spell she cast at the end of the battle. Having efficiently recovered most of the magical power she had lost in the previous battle by consuming modern food, the Demon Lord returns to the Demon World once again. Despite reigning over the demon world as the Demon Lord, she frequently makes secret visits to Japan, spending her days eating easily obtainable convenience store food. One day, by chance, she came across a back alley in a busy downtown area and ended up helping a girl who was being harassed by several men. As a reward for helping her, she was taken to a cozy oden restaurant... The serious and rigid "Demon Lord" discovers truly delicious food and drinks, and friends to share them with after work.

A romantic comedy centered around "The School Prince" bringing the tense conflict of young boys and girls to the breaking point!

Sakimori Kagami plays a VRMMORPG called Arch Earth Online. He is a veteran player with the name and appearance similar to an elderly bearded wizard from a certain book about a ring. One day he purchases an appearance change item as a last resort to spend expiring currency and gets the idea of choosing what he would want to look like if his character was ever a girl. Falling asleep should have suspended the game, but Kagami wakes up still online and feels the game has has gotten a bit more realistic. Did Arch Earth Online finally get a long-awaited update?

Yuito Kujo, a high school student, constantly compares himself to his exceptional older brother and sees himself as a lesser, "degraded version." Caught in a spiral of self-deprecation, his adolescence turns even darker when he discovers that his childhood crush, Suzuno, is in love with his older brother. But just as Yuito begins to lose hope, Suzuno's older sister, Kano—a college gal—develops intense, overwhelming feelings for him...!?

The corporate slave lives with a teenage girl ...! Single old man x teenage girls junior high school student, under one roof! Masahiko Azumane is a man who works all night even on holidays and almost never catches a break from working, it is normal for him to return home in the morning. One day, a girl named Yuri, came to visit him, saying that she was the daughter of a former high school classmate. The two started living together under the promise of "until her mother comes to pick her back up”

Nari who just wants to blend in ends up forming a squad with the three prettiest girls on her first day of high school.

From The Company:
Gods with everlasting lives. Sura who possess unrivaled power. And humans, caught helplessly in-between.
When Kubera’s peaceful village meets its fiery end, a mysterious magician named Asha comes to her rescue. Together they begin on a journey in search of answers and revenge. Meanwhile across the realms, a web of entwined fates is growing tighter. One by one the other players of the game will emerge, each with their own agenda to pursue.
At the center of this maelstrom stands Kubera, the girl with a god's name. Will this sixteen-year-old be the salvation of the world or its destruction?