15-year-old country girl, Suzume Yosano, has to move to Tokyo to live with her uncle due to her father's transfer. She bumps into a mysterious man who ends up taking her to her uncle's place after she gets lost. Turns out, Suzume will be seeing him a lot more often once she starts school because... he's her homeroom teacher!?

Included in the manga is a oneshot story called Tsuyu Kaoru (A Love Story in Moist Rainy Days) in volume six:
A romantic and melancholic love story behind a red umbrella.

Nanase Haruka is a sixth-grade elementary school student who loves connecting with the water and feeling the water as he swims, and he attends a local swim club together with his childhood best friend Tachibana Makoto and Hazuki Nagisa, one year younger than the both of them. Then, one winter’s day as graduation draws near, Matsuoka Rin transfers into Haruka and the others’ school from another swim club. Through swimming, Haruka strengthens his bonds with Makoto and Nagisa, as well as with Rin–at which point Rin, with his passion for the medley relay, suggests they form a team together and enter a tournament.

This is the novel that the anime Free! is based on in manga form at last! (September Scans)

The "after school love comedy" story follows Hana, a small, quiet girl who attends a discipline training all-girls school because she was attracted to the cute uniform. She secretly works at a fancy shop as a part-timer, and one day Hina, the school's super-slender beauty, joins as a new employee.

On the far northern island of Hokkaido, Saichi Sugimoto, a veteran of the Russo-Japanese war nicknamed "Sugimoto the Immortal", seeks the riches promised by the Hokkaido gold rush in hopes of saving the widowed wife of his deceased comrade. When he comes upon information about a massive lode of stolen gold hidden in a location known only to a wily band of criminals, he teams up with a resourceful Ainu girl who saves his life from the harsh northern wilderness and together they set out on a race against the bandits and other forces trying to get to the gold first.

Note: Won the 9th Manga Taisho Award in 2016. Was nominated for the 20th and 21st Tezuka Osamu Cultural Prize and the 40th Kodansha Manga Awards in 2016.

Sequel of Endou-kun no Kansatsu Nikki.

So there's this guy, right? His name's, like, Masato or something. He's got bags the size of suitcases under his eyes. He wakes up one day to find that cloud/sheep things have gone and kidnapped everybody. He also meets this boy/girl/sheep named Dori that's all sunshine and rainbows and stuff. They go around looking for people that haven't been taken by the sheep, with Masato beating sheep along the way with the power of beauty-sleep or something because of a promise he made to his dying mother. How's that for weird?

Kenji Sakuragi is a poor lawyer and ex-motorcycle gang member looking for an opportunity to boost his career. His chance finally comes with the nearly bankrupt and notorious Ryuuzan High School, referred to as "baka gakkou" (stupid school) by some. There, he sets up a special class that aims to prepare students to take and pass the entrance exam of Toudai.

Won the Kodansha Manga Award for General Manga in 2005.

Miyahara Chiko is a mysterious girl who never seems to talk to anyone and always wears a pair of headphones and a scarf. But what is she hiding behind that silent facade?

From MangaProject:
Karigari Hiroshi is a total robotics geek/genius who really likes this one girl, Marie. He's too shy to ask her out, so he becomes obsessed with creating a perfect android copy of Marie. He succeeds perfectly in creating Marie, an android with the intelligence and heart/emotions of a human and who looks just like Mari (though with different colored hair). Of course, Karigari never really considered the implications of such a thing.

Can the world change through the power of imagination!? Daisuke Yamomoto is an 8th grader who has Chuunibyou syndrome, but things get little bit out of hand as he was bullied and almost forced to commit suicide. He didn't do so in the end and discovered an app called "Arcana." Afterwards the mysterious figure from his imagination appears, and his imaginary world turns into reality.
[Batoto]

Official Webcomic

It's about the married life between a newlywed working otaku and his pregnant wife.

From MangaHelpers:

Ignacio DaSilva is a world famous Brazilian karate expert turned soccer player who has been making headlines. His giant body and unusual speed has made him the number one player in the world by far. During his post game interview, he stated that there was someone with more talent than him and that he was coming back from Brazil any time soon. This left the media in a frenzy to find who this player was that was better than the great Ignacio.

Kensho is the son of a karate master who grew up with his next door neighbor, Satsuka, who was the daughter of a soccer coach. As fate may have it, Kensho became a great soccer player and moved to Brazil for 3 years while Satsuka stayed in Japan and became the scholastic champion in her division. Kensho comes back to Japan and attends the same high school as Satsuka. Little does the world know about the tornado that was about to hit the soccer community with the return of Kensho. [vyc]

From Aerandria Scans:
Souta, who's attending a confectionary school, is in a relationship with Saeko, a girl one year older than him. He fell in love at first sight with her four years ago, and right before Christmas last year, they finally had their first kiss. Because his girlfriend really loves chocolate, every day, Souta tries to polish his chocolate-making skills. Even when his girlfriend smells like cigarettes although she doesn't smoke, even when she turns down his invitation to a date on Valentine's day, he's still not broken-hearted at all, and he still continues to love her.

Note: Won the 2012 Kodansha Manga Awards in the Shoujo category and was nominated for the 4th Manga Taisho Awards in 2011.

[Read from RIGHT to LEFT] (Pre-Timeskip:) Iohime, the youngest sister to the Kazane siblings, finally joins them for training away from home. But much to unwanted attentions, she gets kidnapped on the first night she stays with them! (Post-Timeskip:) Iohime goes out to explore and have a fateful re-encounter, while Izumi is left all alone... that is, until he comes home!? Genres: Action, Drama, Historical, Humor, Romance, Slice of Life Demographic Label: Shoujo [There will be multiple pairs!]

Original Webcomic at Lezhin

A new legend begins about exploding whales and general destruction

Mutou Yugi defeated Pegasus at Duelist Kingdom. Now Pegasus's heir, Tenma Yakou, wants revenge. He takes over Kaiba Corporation while Kaiba Seto is in America. He challenges Yugi to a duel and wins using a spectacular but mysterious god card, and then kidnaps Anzu! Thus, Yugi has no choice but to accept Tenma's challenge. He must duel against and pass thirteen duel professors at KC to reach Tenma and beat him.

The story begins with a scientist, Dr. Yorkshire Bell, noting that dinosaurs flourished and became extinct when they advanced beyond their ability to adapt to change. Giant mammals, such as the saber-toothed tiger and the mammoth, came and went the same way

One day, Yasuke was working up the courage to confess his feelings for his childhood friend Akari. It was the perfect opportunity, since the two of them were going to eat dinner alone together at his family's shrine. Before dinner, he rushes through the daily shrine rituals and accidentally breaks a sacred mirror.
A goddess, who looks like a cute girl, curses him for it, and now he will die if he's ever separated from her. All too late, he learns that she's a goddess of misfortune, and horrible things happen around her whenever she's upset. Will he be able to get the goddess to lift the curse? And how will he ever explain this to Akari?

In a post-apocalyptic world, a girl fears the uncertainty of moving forward.