The series stars Hat, the descendant of a hero who fought an evil king and sealed Devildom. Hat falls into Devildom and finds he has to defeat the evil king. 
(Source: AniDB)

When Harimanada makes his grand entrance into the world of Sumo, he causes complete uproar throughout the entire arena. The novelty headmask is clearly not a good idea but not content with just ruffling the feathers of all the spectators, he sends the the entire Sumo Association into a frenzy when he arrogantly declares that he will surpass the legendary Futabayama's consecutive run of 69 victories. Should he fail to achieve such a feat, he will immediately retire all together. 
Harimanada's impudent remarks cause a huge backlash as every high-ranking Yokuzuna wants the chance to knock him down and humiliate him for showing such arrogance. 
Thus begins Harimanada's journey to the top as he battles to topple the entire Sumo hierarchy!

Hyoi and Ryoi, two brothers with the power to take the form of cats, must unravel the mystery of a creeping, tenticled, demon plauge before it consumes them and their classmates. Ultimately, they must confront their old Dark Cat master Jukokubo, though whether they can put an end to the evil he has released remains a mystery. 
(Source: Anime News Network)

Rai is a space opera that fuses feudal Chinese and Japanese customs with vast galaxy spanning empires and space-going societies. The story follows the life and times of the samurai Rai, and the quest of several spacefaring factions for control of territory and, of course, the Empire.

Our story is set in another world, parallel to ours. We meet Pastel, an orphan girl, 18 years old, who lives with a group of adventurers in a small house. Pastel works as a writer and also a "mapper", charting towns, the countryside, rivers and mountains with sketches and illustrations. 
She is highly respected by her friends as her intelligence and honesty are extraordinary. Living in the house with Pastel, we meet Clay, a young swordsman; Trapp, the son of a bandit chieftain; Kitton, literally a working dictionary and a descendant of the Family Kittons; Knoll, a big guy a with tender heart; Whitey, a baby dragon; and Rumy, an infant sorcerer of the tribe "Elf." Together this odd group become involved in many mysterious adventures from treasure hunting, to searching for a missing person, to challenging a riddle, to many more unexpected quests. 
(Source: enokifilmsusa)

Based on the erotic game by Anim. 
 
You wouldn't think that a hospital would be the setting for a series of erotic adventures, but when a new crop of nurses' aides reports for duty, they're confronted by an erotic lesson plan that pushes them to the brink of ecstacy... and sanity.

During the Edo Period, 3 mysterious space capsules were sent down to earth. Fear that it might bring chaos to the earth, the humans at that time buried these 3 objects down beneath the ground and entrusted a piece of descriptive map to the Kamui family. Today, these 3 objects were awaken one by one. The first to awaken, Tri-Zenon, one of the Zenon Guardians is now driven by the descendant of the Kamui family, Akira Kamui, his brother Ai Kamui and his friend Kanna. Aliens who descend to earth with a purpose will now have to face Tri-Zenon.

A big transatlantic ship, full of rich and important people for international business, has been taken by a group of terrorists. The only hope for their rescue is in the hands of a Japanese man known as Japa, but first, he must hire seven companions to help him, and together they will be the Wild Seven. The main plot occurs in the waters of Nicaragua's Canal.
 
(Source: Anime News Network)

In the distant future, monsters and inhumans roam the land, and the ruling Evil King seeks a human woman to bear him powerful, force-adept heirs. Non offers herself to the Evil King in order to save her village from Ape Clan raiders, and gives him twin sons, Loof and Jin. She and her sons are exiled by the ungrateful villagers, however, and Non's companion Nue (a Demon Clan member changed into a wolf for disobedience) takes Loof to be raised by his father, the Evil King. The Evil One's Queen Parome despises humans, however, and her malevolence towards Loof deepens... 
(Source: AnimeNfo)

Takeshi Kido and Kentaro Shiratori are a pair of friends who have been together for almost their entire life. One night, a strange being comes out from the lake and starts attacking them. When Takeshi and Kentaro are almost eliminated, a strange being named Kopu calls them and tells them that they are the chosen ones to inherit the power to protect the world from an evil being named Goumon. Now, they join their hands to transform into Barom One, a being with superior skills, who will fight to protect the city. 
(Source: Anime News Network)

Millie Nocturne has one great goal in life: to be the best in the universe - at absolutely everything! But when she tries her hand at being the "best detective," she ends up an unwilling partner with two people who will change her life forever: Kane Blueriver, the psi-blade-wielding master of the starship Swordbreaker, and Canal, the smart-mouthed holographic image of the ship's computer. 
Join this unlikely trio on their adventures as they hurtle through space facing off against intergalactic crime lords, rogue starships, and hijackers dressed as chickens... and that's just the tip of the asteroid! 
(Source: RightStuf)

In search of fame, fortune, and foreign food, Lina Inverse sets sail on a collision course for the new world! What she finds there are vengeful enemies, a bunch of high-and-mighty dragon lords, and a new quest to save the world from destruction. What’s a girl gotta do for a little vacation? 
 
(Source: Software Sculptors)

Let the forces of evil tremble in fear (along with wealthy merchants and innocent bystanders)... THE SLAYERS ARE BACK! Join the not-so-heroic adventures of Lina Inverse--the super-cute sorceress who steals from the rich and keeps it for herself! Along with her sword-swinging (but dumber than dirt) sidekick, Gourry, her hyper-enthusiastic protégé, Amelia, and the tormented and overly-serious golem, Zelgadis, there's nothing Lina can't do! 
 
(Source: Software Sculptors)

Welcome to a world where magic reigns and monsters lurk behind every corner. Into his land of deadly dragons and menacing magicians comes our heroine -- Lina Inverse, a cute, fireball-throwing sorceress who steals from the wicked and gives to herself! Along with Gourry, a handsome but dumb-as-a-rock swordsman, Lina challenges the forces of not-so-goodness as she seeks truth, justice, fame and gold! Well, mostly fame and gold... Grab your pack and join the wackiest bunch of misfits ever to embark on a quest! 
 
(Source: Software Sculptors)

Tomoya Mikami's life changed one day when his girlfriend Ayaka was hit by a car and killed on her way to meet Tomoya. He blamed himself for her death and never was the same after the accident. He began acting callously towards Yue and his other friends. Furthermore, every time Tomoya gets involved with a new girl, he sees images of Ayaka in his dreams. He decides he needs to find a way to say goodbye to his lost love once and for all, while dealing with several side romances at the same time.
 
(Source: Anime News Network)

Insecure Ai Shiomi begins attending the prestigous Psychic Academy for psychically gifted students, following in the footsteps of his legendary older brother.
 
(Source: Anime News Network)

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