A collection of nine surreal short stories sharing a theme of water. 
Chapter 1, Bon: A young boy ponders family affairs around Bon.
Chapter 2, We’re Still on Our Way: An astronaut cadet must figure out his motivation if he is to succeed and go into space.
Chapter 3, Fusion: When the ultimate form of love is fusion, the government must work to stop a declining population.
Chapter 4, Such Sorrowful Stars: In a near-death experience, a man meets a solitary girl running endlessly.
Chapter 5, Salt Damage Season: A young woman is captivated by marine “vortexes”.
Chapter 6, Sea Weather: A girl follows a schoolmate home only to realize she lives under the sea.
Chapter 7, Squish: A girl can see things she calls “squishes”, transparent blobs all around us.
Chapter 8, Meltism: If we are the same as the planet, what separates us?
Chapter 9, Season・Time・Water: The world adapts to the changing of the seasons.

It began with first contact. In a dystopian world, a silent "watchman" follows and evaluates a gifted young woman.

From DrMaster:
Yuji Midorikawa is your typical high school student whose has a secret identity: He is "Green" in the high school battalion unit, Gakusei 5 (G5 for short). G5 is the special unit trained to fight and protect Earth against the invasion of the dreaded Galactic force "Gurdark" and its sexy queen Mayura. But Green has a problem. He really can't fight, and always ends up hiding behind his other team mates. What ensues is a witty and wild ride as our "Imperfect Hero" struggles to maintain his reputation as a "guardian of earth" while keeping up his grade point average in school!

A parasite keeps a house of mysteries that is full of twisted exhibits. Another kills an entire family, only to get stuck infecting a teenage daughter obsessed with fairy tale romance manga. These and 13 more stories, from some of the greatest shojo manga artists alive today, make up a chilling, funny, and entertaining tribute to an all-time classic series.

A girl after falling through a hole in the floor of her school discovers a robot. How will this girl and the robot interact?

A mysterious mastermind single-handedly releases 206 of the most dangerous prisoners around the states. When the prisoners rampage New York City, the police helplessly watch as a young boy with a katana appears. His mechanical arm has a countdown from 206; what is his purpose?

Who's the most popular of all the Tenchi girls? That's an easy question to answer. It's sweet li'l Sasami, of course! She's the cutest and best loved and, without a doubt, the most accomplished cook of the bunch. Whether she's thwarting evil space invaders or simply negotiating peace among her bickering housemates, Sasami always has a big smile on her face.

Youko gets a visit by a girl from the future who needs to have sex with her because she wants her egg cells.

Itsuki Minami needs no introduction – everybody’s heard of the “Babyface” of the Eastside. He’s the toughest kid at Higashi Junior High School, easy on the eyes but dangerously tough when he needs to be. Plus, Itsuki lives with the mysterious and sexy Noyamano sisters. Life is never dull, but it becomes dangerous when Itsuki leads his school to victory over some vindictive Westside punks with gangster connections. Now he stands to lose his school, his friends, and everything he cares about. But in his darkest hour, the Noyamano girls come to Itsuki’s aid. They can teach him a powerful skill that will save their school from the gangsters’ siege and introduce Itsuki to a thrilling and terrifying new world.

Note: Won the 2006 Kodansha Manga Award in the shōnen category. A new edition named Air Gear Unlimited was released in 2014. The format is bigger and it contains some coloured pages.

The Academy City on water, "Rikka". This city, otherwise known as 'Asterisk', was famous for being the world's largest stage for the integrated battle entertainment <Star Wars Festival>. The young boys and girls of the <Starpulse Generation> belonging to the six academies made their wishes with Shining Armaments in their hands, vying for supremacy -- Amagiri Ayato is one of them.

Ayato arrived at Rikka at the invitation of the Student Council President of the Seidoukan Academy, Claudia, and right after that he incurred the wrath of the <Petalblaze Witch> Julis, and ended up having to duel her.

Kidou Ryodan Hachifukujin is set in the near future where Japan has been subjugated by China and now fights against its former ally America under the Chinese banner. Fukujin, literally “luck god,” are advanced armor suits that are impervious to most conventional weapons. The story follows new recruits in the army of Japan, in a war-torn future.

An eccentric girl, a pacifistic guy, and the Fukujin figure in a story about war, violence, and militaristic subservience.

From Viz:

Are the woes of the present meant to be endured for the promise of a better future or to atone for past wrongs? In a captivating epic of love, fate, and faith, seven young people must struggle with this spiritual puzzle as their alien past lives threaten the future.

Kasagi-chan is an member of an alien race of females called the Arume. She spends her time playing matchmaker for unsuspecting cute Earthling girls.

Collection of oneshots published between 2011 and 2014.

From Dark Horse:

In a strange future where gifted, "hybrid" humans police the planet, Mina is a likeable tomboy with growing psychic powers. When a young boy falls into a coma after gazing into her eyes, it's clear that there's more to Mina than her pretty looks. This young boy, Inchang, grows up to be quite a daredevil, and his awkward, secret love for Mina fuels his protective fire when mysterious men arrive, bringing the violence of the "hybrid" world with them!

Collection of short stories, including;

- Flower
- Memories
- SOUND OF SAND
- Farewell To Weapons
- Hair
- Electric Bird Land
- MINOR SWING
- Chronicle of The Planet TAKO
- Chronicle of The Planet TAKO, Chapter of Dawnlight
- Fire-ball
- That's Amazing World - Magic pot of Aladdin
- That's Amazing World - Noah's Ark
- That's Amazing World - old man and sea
- That's Amazing World - Knights of The Round Table

Collection of short stories.

Angel
A oneshot Kuroda drew to celebrate the release of the Nasu anime.

In this story, the world is in chaos, thanks to Washu. Now in order to save it, Tenchi Masaki must go undercover as a student teacher at an all-girls school. Unfortunately for him, trouble always comes his way as he has a hard time to deal with the hijinks of his new students.

Lelouch, Suzaku and other young warriors battle in the late Tokugawa Shogunate era, where the power of Geass forced Japan to falsely open up their ports!!

The curtain rises on an alternate world tale of Code Geass!!

(Taken from Bandai Entertainment)