From Watase's Sorai:

This story is about "Yusura" who was left under a cherry tree 15 years ago. She grew up as a daughter of a pharmacist and works as a "Hikeshiya", who can erase sadness from people by using the Kongoumaru, which turns blue as it absorbs people's sorrows, then sends it back to the person guilty of causing the sorrow

From Esthetique:
As Yusura grew older, she acquired a reputation as the "Hikeshiya". Using her Kongoumaru, Yusura would eliminate sorrow from those who were suffering. Literally. One day, a nearsighted young man was being chased by several villainous looking fellows, so Yusura helped him. She took him back to her home,where she learned his name was Samon. Samon was the Daimyou of Sagami. Samon and Yusura have many interesting experiences in Edo Japan. The two run across many unique characters and with their aid have even more unique and exciting adventures.

A love story between two dancers: Junaque, a relative of the Belgian royal family and Shara, a Japanese transfer student. The story begins at St. Maria's, a private Catholic school in Belgium, but later the action switches to the show business life in New York.

A collection of one-shots publlished between 2007-2008 published on various magazines and the Nisekoi pilot chapter:

1. Island (2007, Akamaru Jump)
For the last 400 years, an island has been completely surrounded by walls, isolated from the rest of the world. Aira and Marue have always dreamed of voyaging outside the walls, where lies a devastating truth unbeknownst to them.

2. Koi no Kami-sama (2007, Weekly Shonen Jump)
Tsuchibe Taichi, a boy who loves shoujo manga and believes in love above all else, ironically has the worst luck in love. His latest attempt in love is at the new transfer student, but a strange otherworldly force seems to be repelling him from her.

3. Williams (2007, Weekly Shonen Jump)
William is a young boy who idolizes Aradoff, a character from a popular novel which told Aradoff's adventures, and always dreams of having a grand adventure on his own. William's meeting with the novel author finally puts him on an adventure to prove that the novel is not merely a fiction.

4. Personant (2008, Jump SQ)
In the year 3333, everyone wears personants, technologically advanced masks, to maintain equality and peace, because they eliminate the "differences" in people that lead to discrimination and conflict. It has been 100 years since the government implemented this "personant system," so society has adapted. Yet one man exists as the only one in the world without a personant: the wanted criminal Damore!

5. Apple (2008, Young Magazine)
The main character (the blond ponytailed guy - yeah, guy) is Aramiya Satoshi, whose main ability is shape-shifting into any animal... though at some point he has plants growing out of him, so he is able shape-shift into any living thing. I'm not sure if he was naturally born that way or if he was a biological experiment. Anyway, he's a pretty easy-going guy who just wants to be left alone to enjoy his solitary life in the middle of a junkyard, but apparently some army or another is always after him because of his ability. Luckily, he is able to fight off entire tank battalions before breakfast.

6. Nisekoi (pilot chapter - 2011, Jump Next!)

The young sorcerer, Sano, attempts to fulfill his destiny as savior of the world as he struggles to solve the mystery behind his father’s death and research on the incredible source of power that is Apple Black.

From Lililicious:

Four-panel comic. Many boob jokes.

N/A

Oneshot about a Tea Fairy with the mission of giving a better taste to the tea.

Unfinished space science-fiction manga by Otomo Katsuhiro.

A collection of short stories:

#1: Ringo Hoppe no Koi
Takami has a HUGE problem! She blushes at the drop of a hat, so everyone knows what she is thinking! She finally makes a decision to stop letting her fear of embarrassment control her -- she gets a job where her crush is working so that she can confess her feelings to him... but then things go awry in an unexpected way!

#2: Hinatabokko no Heya
Tomo and Daisuke have been childhood friends for ten years. Whenever something goes wrong with Daisuke, he finds refuge in Tomo's sunshine-abundant room. When Tomo asks Daisuke for a 'date' with him as her birthday present, will the equations of their relationship change?

#3: 24 Ko no Kurisumasu (24 Pieces of Christmas)
Rio met Ian, the son of her father's friend, during Christmas when she was in the third grade. Ian turned out to be a devil with an angelic smile. That Christmas remains as an irritating memory for Rio, considering how Ian played multiple pranks on her and bullied her throughout the day. After that Christmas, Ian's family moved away to England and she didn't get to see him since then. But Ian sends Christmas cards for her every year. Years later, during Rio's 17th Christmas, Ian is back in Japan......planning some new pranks?

In an experimental school in Japan students are instructed to download a mobile app named TROIA designed to improve their education, enhance their interpersonal skills and encourage social activities by completing 'Quests' that are randomly sent to each student.

Sounds like a bit of fun but there is a catch, the bottom ranking student each week gets expelled and soon students find out that the 'Quests' are not as innocent as they appear nor strictly bound by rules.

Friendship, trust, respect, knowledge, skills, every student will be tested to their limit as failure is not an option!

From Tapastic: A story about me, my life, my family. Life is full of regrets, but what if I try to redo them, would I regret my regrets?

Iori always liked Naoto, even though Naoto cannot accept the fact than someone from the same sex is in love with him. But seeing the sad expression on Iori´s face, he can no longer refuse Iori´s feelings...

This is the continuation of the younger brother story from Self Portrait...

5 years ago, Haruki's brother Hiroki was swept away by the raging river when the bridge Haruki had built broke, and Haruki believes he is responsible for his death.

From Hochuuami: When Shirakawa gets fired from his job, his future is looking bleak. Yamato, his junior from college, suggests that he take a turn at being his housewife. Can Shirakawa make a succesful move from boardroom to the kitchen?

From Tokyopop:

After 150 years of terraforming, Aqua, the planet formerly known as Mars, now has over 90% of its surface covered by water. A young girl named Akari Mizunashi arrives at the city of Neo-Venezia, an exact replica of the old Italian city of Venice, hoping to become an Undine, the most coveted job on Aqua. Follow Akari's adventures as she discovers the wonders of Aria in this prequel to the popular Aria anime and manga series.

Mizu Wakusei Nendaiki (Aqua Planet Chronicle) series.

A short oneshot about the idols Koyori and Yuwa, whose relationship isn?t quite like what it appears.

Tastumi is a normal boy going to school and living with his strict older brother. Orphaned at a young age, his brother has been both a mother and a father to him. One day, he and his friends are about to rescue a beautiful girl from being harrassed when she beats them up herself. When she sees Tatsumi, she suddenly calls him "Rui". What does this mean? Who is the girl? Why are there strange men attacking him all of a sudden? And why is his brother suddenly so different??

From the days of housekeeping, Jung Hyoon had promised Yoon Su that he will marry her. For 3 years Yoon Su has been preparing meals for Jung Hyoon before he takes his test believing in the promise made to her. But Yoon Su’ s goal of life had suddenly changed and disappeared after rushing out of her SAT testing room. While daydreaming, she had nowhere to go. Coincidentally she met her old optimistic friend Tae-Kyung who is also taking the SAT test.

12.000 years after the events of Sousei no Aquarion, mankind is threatened by a new enemy from other dimension labeled "Abductors", who just like the Shadow Angels, invade the human cities to kidnap its inhabitants. To defend humanity from this invasion, the Neo-DEAVA organization establish two teams, one composed of only males and other of only females, each one piloting their own giant machines called "Aquaria". To protect his new friend Mikono, teenager Amata Sora decided to use the powers he has kept secret his entire life and by combining Vectors with male and female pilots into one single robot, the legendary giant Aquarion is reborn once more.