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.

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!!??

“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.

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!

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.

Satou Shiki, a university student, was suddenly stabbed by a slasher only to be reincarnated in Labyrinth City. In this other world, he who has awakened to [Appraisal] and [Healing Magic] does a lot of “things”.

In the second half of the 2nd century, Naru, a warrior from the state of Koryo, was sold as a gladiator-slave to the Roman Empire and waged a desperate struggle for freedom.

From Tokyopop:
After an imprisonment of five days in Heaven, which equals five years on Earth, Soma is sent to the human world to recover the lost sword. Under the supervision of the heavenly princess Aroomee, Soma must deal with the chaos that his deeds have produced.

This manga follows the adventures of a group of mercenaries: the barbarian Mocha (the main character), the rogue Buruman, and the mage Kiliman (Blue Mountain and Killie Mountain, respectively, are famous coffee brands in Japan).

Mocha and her gang belong to a dark mercenary guild. Mocha, being a barbarian, has great physical strength and, of course, she has no brain. Despite her very revealing suit, she is very innocent, pure and naive. The story starts when a light master seeks to hire some mercenaries, and the guild refuses to help him since he has no money with him. So the dark guild master sends Mocha, Buruman, and Kiliman to aid him. It's really not a great start but this is how everything begins.

The author's drawing dramatically improves after volume 5. The plot becomes much more refined as well. It can be considered a typical adventure story. However, this manga goes a little deeper than that.

After volume 10 or so, the plot becomes really profound and deep. Dragons are involved, and whole nations go to war. The scale becomes quite large. Really enjoyable manga.

In a world that always has 16 heros, Sion [Shion] is a hero of darkness and the strongest. But he has been tricked by his own companies. Being sucked power, He was teleported to a far place…

After the great war of the late 1990s as Japan begins construction on a new capital city, earthquakes cause massive destruction and rumors of demons have begun to emerge. The protagonist receives a warning and a demon summoning program.

In the region of Kalos, an old tale spoke of two legendary Pokemon, Xerneas and Yveltal, who were said to appear every 1000 years to clash with each other. The myth became a reality when the two showed up inVaniville Town one day, wrecking havoc to everything in the area.With their homes destroyed, X, a prodigy in battling who went into seclusion after an incident related to to the paparazzi, was forced to go on a journey with his childhood friends: Y, a Sky Trainer in training; Trevor the scholar-to-be; Tierno the dancing expert; and Shauna, who aspired to become a Furfrou Stylist. Under the constant threat of the ominous Team Flare, who was after X's mysterious Mega Ring, the five young trainers must stick together and depend on each other to weather through each challege and seek what they find, including an answer to the mystery of Mega Evolution...

The world’s first action game VRMMO FWO (Fantasy World Online). Our main character chose to become a Summoner. While not so much in particularly willing to go about aggressively capturing monsters or aim to be the strongest player. Just wanting to have an adventure to search for cute monsters and clothes’ material. Without noticing in the flow of one situation after another, he becomes the top ranking Summoner.

From DGM:
WITH LOVE, ANYTHING'S POSSIBLE
A little unicorn named Unico lives with his mistress Psyche, bringing her happiness and good fortune in return for her unconditional love. The goddess Venus, however, grows jealous of Psyche's legions of admirers and flings Unico across time and space! When he awakens, he's facing down mean buffalo in the American West, with no memory of Psyche or his past life.
It's the first of many exciting adventures that will bring Unico face to face with high society in Imperial Russia, characters from fairy tales and Shakespeare, and even an automated factory intent on blotting out the sun.

Midorimaru Matsunoki, the only son of lord Matsunoki Mumeharu, retainer of Hideyoshi Toyotomi, becomes involved in his father's secret plans about construction of a new castle. Soon after encounters a female peasant school teacher, Tae, who becomes his lover. Circumstances even come to affect the beautiful female noble Yayoi, who hates (and loves) him, and his beloved sensei, samurai Fujinosuke Murasaki, the main constructer of the castle, in ways no one would have anticipated...

This is a fast-paced story with overt characterization that reflects on the fairness of love and war.