There was a mage called ‘The Lone Demon King’ at the frontier.
He was just a creature that never grew old, but he was loved by the villagers as something of a guardian deity.
However, he was destroyed by a magic organization that sees his existence as dangerous.
200 years later, he is reincarnated as the second son of an aristocrat and obtains the strongest magic power.
“Let’s pretend to be a human this time”
However, being a human lover, he didn’t particularly think of revenge and has decided to pretend to be human in this life.
In his past life, he was the guardian deity of a region, and in this life, he’s a local aristocrat, but he does not know common sense. He doesn’t know how to take it easy.
As the second son of an aristocrat, he is loved by his family and friends, and while he is regarded as a master of magic in the magic guild, he becomes an ‘Immortal Mage’ behind the scenes.

Webnovel Raw: https://ncode.syosetu.com/n9450fl/

One day, Sanada Shirou, who works for a black company, is transported to another world. Using his "creation magic", an ability he gained when transported, he opens an inn and is supposed to lead a slow life, but this other world is a little strange?! It is a world where women are overwhelmingly dominant, where women do dangerous work and battle, and men are powerless and are protected! The daily life of entertaining (in many ways) the women of this other world begins...!

Web novel: https://kakuyomu.jp/works/1177354055503576578

From MangaHelpers :
High school student Misumi Makoto is called into a fantasy world by the god Tsukuyomi, in order to be a hero. However, powerful others in this world aren't as thrilled to have him there, and they kick him to the edge of the world just as Tsukuyomi declares that he must leave Makoto to find his own way. Now it's up to Makoto to find his own way.

After being reincarnated into another world where the chastity and moral values of men and women are reversed and women rule the land, Faust was raised by his mother as a rare male knight. He's quick to become a war hero with many achievements under his belt, but because he inherited his way of thinking from his previous world, there's a certain severe pain in his groin day in and day out when faced with the likes of a scantily clad Queen who may as well be in the nude or the sexual harassment of the well endowed Duchess he calls a friend, among others...

Saitou is an ordinary handyman that gets transported to another world where his skills are very useful. He starts to really understand what it means to be needed.

Shinobu Iijima lost his life along with his beloved sister and prickly stepfather in a mysterious disaster.
When he woke up, he was reborn in the world of the game he had been playing.
Shinobu was in despair as his stepfather erased his game data and he had to start from the tutorial, but he learned that his sister would soon be reincarnated into this world as well.
In order to stop his father-in-law, a top player who was after his sister's body, he embarks on a painful path to become the strongest...!

Abandoning money, fame and honor, the knight Bard embarks on a journey to find his final resting place. Tasting delicious food, admiring the unfamiliar scenery all by himself, his journey to find a place to die quietly begins.

What he doesn't know however, is that this is the beginning of a new adventure for him.

An 18-year-old girl who lost her family in an accident, Yamano Mitsuwa falls off a cliff one day and transferred to a different world with a civilization level of medieval Europe. Mitsuwa who discovered it was possible to go and return to Earth after a deadly fight with wolves decided to live in both worlds.

「For security in old age, I will aim for 80,000 gold coins!」

I will try not to let strange things circulate to not distort the progress of the world, but I won’t hold back for the sake of my easy life and safety!
While wearing three handguns along with words and deeds that appear decent, in her head Yamano Mitsuwa is a sly girl. Making an effort to make money even with a small body that looks like a child to Westerners!

Oh, my secrets are too dangerous, is that so? It’s all right, it’s fine! I’ll teleport away when push comes to shove!

It is the year 2025, and NASA has announced the crew members–including Japanese astronaut Hibito Namba –of the first mission to live on the moon for an extended period. Meanwhile, in Japan, Hibito’s auto designer older brother Mutta Numba is despondent after losing his job. Although the two brothers have followed vastly different paths, their respective destinies begin to move and merge as the result of a vow they exchanged as boys.

Note: Was nominated for the Manga Taishō in 2009 and 2010. Won the award for best general manga at the 56th Shogakukan Manga Awards and at the Kodansha Manga Award (shared with March Comes in Like a Lion) in 2011. Won the Reader Prize of the 18th Tezuka Osamu Cultural Prize 2014.

From Nyan-Nyan Rampage:

"The final arc of the story begins...

When Takao Osugi receives the mysterious "Universe of the Four Gods" book from his mentor, Einosuke Okuda, he does everything to keep it away from his young daughter, Suzuno. But when disaster strikes Tokyo, can he still protect her from her fate?

Shortly after the tragic finale of Genbu Kaiden, young Suzuno Osugi's tale as the Priestess of Byakko beings to unfold!"

The setting is a certain kingdom. In order to save the kidnapped princess of the kingdom, the Kingsguard squadron challenges the "Dragon Tower," a gigantic structure floating in the middle of the sky, but they are blocked by powerful demons.
A provocation is made by a neighboring village to replenish the injured personnel, and when a young man is sent to the tower, the wheel of fate begins to turn.

Tale of sword & sorcery and labyrinth exploration begins!

Chika Suzugamori, a rookie manga artist, has been getting rejected every time she submits a new draft.

On the verge of giving up, she suddenly gets the idea of going on a journey-

A journey that heals precisely because it's rough - the ultimate travel comic!

Beryl Gardernant is a humble sword master who runs a dojo in the Reveris Kingdom.

He had come to terms with the limits of his strength and was living a leisurely life in the countryside.

However, his life changes drastically when Alexia, one of his former students, suddenly visits him and tells him that she has recommended Beryl to be a special instructor within the nation’s Knight Order.

He is reunited with his former students who have become big-shots such as knight captains, top-ranking adventurers, and ace magicians, and he is kicked out of his family’s dojo.

Turbulent times were ahead of him.

Beryl was happy that his former disciples adore him, but he is also humble about the fact that he is not very strong.

However, while he wasn’t aware of it, he was the owner of an unparalleled talent.

Unconscious of his power, Beryl is surrounded by ex-disciples who know of his strength, and gradually makes himself known to the world, all the while remaining rather unaware of all of this.

A man was about to commit suicide and decides to search for a way to die in the internet, but then he found an odd site that asked a lot of questions and had a point based system that allows you to create skills and abilities for a character. He took interest in it and when he finished setting his character he was asked "You will now be transported to a world with the settings you choose, coming back is not possible, do you still accept?" Then without thinking much of it he pressed YES and found himself in another world with the skills and abilities he chose to have.

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/

This is the tale of a man who had mastered how to “parry.”

“I have no talent at all…”

At the age of 12, a young boy named Noru had decided to train himself in the mountains after being rejected by the capital’s official training centers for being “talentless.” He believed that, with enough hard work and effort, he could one day become like the protagonists that populate his childhood stories. Full of determination, he would practice every day with his makeshift wooden sword, endlessly repeating the only sword technique he knew—“parry.” The hours turned into days, the days turned into months, and the months turned into years. Eventually, he had trained this one skill to such an extreme that he could snap a thousand branches with it. However, no matter how hard he tried, he couldn’t get the desired result, he couldn’t learn any new skills required to become a real adventurer. It may be time to let go of his dream. But he couldn’t. Not just yet. Knowing this, he returned to the capital again.

This was a man of endless dedication, a man who used that dedication to become one of the strongest in the world. The only problem is, he didn’t know it yet.

Han Lee, a graduate student.

Born as the youngest member of a famous magic family in another world.

He vowed never to go to the place where the word 'school' was written.

The place where the resolution was headed to the colorless was the notorious magic school 'Einroguard'.

Self-sufficiency is the default, monster appearance is an option, and professors are all the same!

The salty school life that I have never seen before begins.

Can I... graduate safely?

Elven girl, "Aria" is an adventurer. A small beast with an adorable face embraces Aria's fruitful chest, she decides to keep it as a pet and names it "Tama". At first sight it's just an average cat, but Aria has yet to notice that Tama is a former Knight and that his identity is not a cat, but a young monster of the strongest class "Behemoth".

“You have been chosen as a player in the great game to select the next god’s successor, the Mission! Congratulations!”
Seonghoon has suddenly fallen into another world to participate in a game to become a god. This other world that is akin to that of a game contains players who cooperate and also kill each other in cold blood…!!
Seonghoon, a person without an ounce of talent, uses wicked and crude tricks to become an all-powerful player!

As a result of a large war, the world was eroded by a magical infection that distorted the time and space around it. Though magic has been outlawed since then, the effects of that war still remain. To uncover all the secrets of the world, "Lucky Solte," begins her adventure.