“Maou Army’s strongest magician” I’m called. Ike, a demon capable of capturing a fort alone. Clearing away enemies with immense magic, he is without a doubt a monster awed by friend and foe. However, he has a secret he can’t tell other demons. “I, actually I’m human you know.” Using modern knowledge to keep his secret, he became treated as a great commander and the driving force of the Maou’s army.

Akira Kudo, a high school student who can freely travel back and forth between Japan and another world, Do Merta. With no goals in mind, he spends his time after school enjoying life in another world as he is!

As an adventurer, he gets teased by the guild's receptionist, receives "rewards" from his magic master, and has fun with the girl he helped...!?

"I hate pain! I don't care about ranking up! Guild requests are also troublesome!"

A leisurely labyrinth exploration fantasy just for after school!

An ordinary office worker should have died in a traffic accident, but when he awoke he became a goblin. Goblins have a lifespan of only seven days. However, the hero who has been given the skill "Human 80 years" takes advantage of his longevity and takes over the skills of many goblins and even the demon king who is on the verge of destined life, and stands out in a different world. Weakest Race x Strongest Skill = The strongest fantasy is incomparable!

Saeki Kanji, 32 years old and still single, is living in the Japanese countryside, which is in decline. After graduating from university with a degree in economics he took a job as a salary man in a leading company in Tokyo, but retired when he inherited the family farm in Miyama village when his parents passed on. He soon took to the life of a simple farmer.

One day a beautiful woman wearing full body armor came to his door begging to stay the night. She claimed to be royalty from another world and is unable to return there. She ends up living with Kanji and helping out the local agriculture situation.

From MangaHelpers:

After a god screws up and accidentally takes high schooler Shou's life, he offers him reincarnation with a gift to make up for it. Shou asks to retain all his old memories for the new life. Shou is reborn as Will, a noble's son in a world where magic use is common and involves knowledge of kanji characters. With all his memories, he's a brilliant toddler, and when he experiments with magic, he finds that he has an amazing talent for it! What's more, though he was smart but unloved in his old life, in his new life he has a mother and a father who both love him deeply. His future as Will is looking very bright! [tethysdust]

Hit by a truck and reincarnated in a different world, then a beautiful woman greets me "Long time no see Master"

Restart in Easy mode from level 1 in the peaceful world that I once saved!
Follow the world's strongest sage maid, train slave girl to be strong, convert thief girl, get more friends! Even the luxurious residence and the strongest equipment remain as you wish!

Be the most powerful in this new game!

Shiori was a veterinarian who died in a traffic accident and was reincarnated as the daughter of the Duke, Luna. She learned that there were animals in this new world that couldn't be found in her original world and dreamed of meeting them someday. However, her engagement was suddenly annulled one day and she was banished from the country. With that, she decided to embark on a journey to meet new Mofumofu! "Wait for me, my beloved Mofumofu!" Luna's love for Mofumofu explodes!

A man tried hard living up to his motto "I don't want to work" - Ninomiya Kinja, was summoned to a different world and forced to work in harsh environments with low wages, and long hours

Masaru is an ordinary middle-aged guy who does construction work on convenience stores and home centers and whatnot.

Do I really need to give you the rest? Reincarnated in a young body, bunch of low-quality skills but are good for his own profession, decides to do construction again, girls with rabbit ears, slow life. You know what you were getting into the minute you saw “Home Center Isekai” in the title, so why are you still reading this and forcing me to write another synopsis for an isekai with the same plot beats as the last three?

One day, Kijou Haruto was forcefully transmigrated and cursed by a god from another world. A world of swords and magic. In this world, you get stronger by increasing your battle levels. But due to a curse, Haruto is unable to gain levels. However, due to a mistake by the Evil God, Haruto was able to obtain an inexhaustible supply of magic...

Paw pads wrapped in white fur. Fluffiness around the neck. A bushy tail. A rounded figure that was the very definition of fur ball! ――A certain Japanese girl had been reincarnated into such a fox cub; Milfiria.
Milfiria was told to watch the house by her mother, as the mother left for the capital. However, unable to bear with the loneliness and deciding to chase her mother to the capital, Milfiria became lost in a fort protected by strong knights.

The battle between the Demon King and the Hero will decide the fate of the world.

Verna, the son of a nobleman, who remembered that he was reincarnated in the world of an RPG game, he was originally a mob who died without a name. The reason is probably the attack on the royal capital by the Demon King's army. Judging that, Verna mobilizes all the knowledge and wisdom of his previous life to find a way to survive in order to avoid a tragedy.Train yourself with the knowledge of the game and become friends with the Hero Mazel. The game start event "Monster Runaway Stampede".

On the battlefield where the Hero is absent, Werner shows a lion-like performance by thwarting the aim of monsters that no one has noticed, and will change the history of the game!?

The full-fledged war fantasy of mob characters who struggle behind the legend begins here.

After regaining consciousness, your average high-schooler Asagaya Shin has become an AI for a space battleship. As if that wasn’t enough, the ship has been surrounded by enemies, and he himself has a damaged engine, putting him in a dire situation.

The warship commander had already died in combat, and taking the place of the temporary commander is a young girl of the imperial family, who had joined the ship out of courtesy. Shin had tried convincing himself that this was a dream, but being persuaded by the girl, he stands as a battleship.

After somehow crushing the enemy at point-blank range, the fleet’s fight is over, and the battle for the fate of the empire has ended in a crushing defeat. Shin gathers up the survivors and plans to escape the battleground, but there’s a large enemy fleet on the route to the empire. He makes a jump deep into the enemy territory on a slim chance, but —

Set 10,000 years in the future, a young boy has been turned into an incredibly powerful cheat AI and leads a small fleet to become peerless. There’s romantic comedy, imperial intrigue, ancient weapons, philosophy, and more!

“Hey, hurry up and massacre those bandits!”

“No way, I don’t want to work…”

Spending my daily life in leisure, that was my pastime—until I was summoned into another world and met a blonde loli introducing herself as Dungeon Core No. 695.

“Save my dungeon. By the way, if the dungeon core is destroyed, you’ll also go down with me as the dungeon master.”

A dungeon with a single room. Moreover, one already controlled by bandits. This is a [Checkmate] no matter how you look at it. Guess there’s nothing to do but somehow get out of this situation so that I can [Not Work]!!

Manga adaptation of LN 7 of Mushoku Tensei

Max-level internal arts, max-level external arts.

Jianghu, Murim’s famous and strongest, Cha Shin Hyeon.

I came back to Earth after reaching the peak of martial arts, but why has everything changed so much?

A world where monsters are coming out of dungeons, and hunters are leveling up via their status windows.

‘Start again from level one? That doesn’t phase me at all, since my martial arts are already at the max level.’

At the age of 6, Ed, a boy suddenly recalls that he is a reincarnated individual from modern Japan. However, his current life unfolds in the slums of another world! Struggling with a poverty-stricken existence in his daily life, he shares his living space with and eats with his childhood friend, a girl named Miinya. Their daily fare consists mainly of 'boiled beans.' Ed, drawing upon his knowledge from modern Japan, discovers edible wild plants and leaves suitable for making tea to improve their dietary situation. In pursuit of a slow life, Ed's life of gathering and hunting begins!

Iruma Takumi, a 40-year old salary man, was dragged into a hero summoning just like in a template. What was his fate? The Goddess sent him and the heroes to the other world separately.

With the Goddess’ overprotective support, he landed in a different world looking handsome, rejuvenated, and quite different from a Japanese.

Although he wanted a slow life while working in the manufacturing trade, that was not permitted by the Goddess’ special body and abilities.

Would Takumi be able to live a peaceful life in a different world?

Like in the famous Osamu Dazai's book "No Longer Human"/ "Disqualified From Being Human" (Ningen Shikkaku) , the protagonist of this story attempts a double suicide with his lover... except he gets hit by a truck and summoned to another world instead.
Now he wants to find his lover, so he can commit suicide with her.

From a young age, Minami Harusumi has had recurring dreams of Veronica, a princess whose kingdom is on the verge of destruction. He believes them to be recollections of his past life, and that he is her reincarnation. Because of this, he is ridiculed by his classmates. One day, when the mockery escalates into bullying, he rediscovers magic - something Veronica had studied and used. Reassured his past life is not merely a fantasy, Minami tries to learn more about his past memories and the reason behind them...