Fujiko, Fujio F.

Doraemon is cat shaped robot from the future traveling all the way back to the 20th century in order to help Nobi Nobita, a lazy kid with nothing really going for him. Nobi is bad at sports, his grades are terrible, he can't even win a match of rock-paper-scissors. Doraemon has a hard task ahead of him but he is well prepared with a huge arsenal of the most inventive and funny gadgets available. The problem is he's not the most competent robot cat helper out there either and the pair gets in constant trouble because of it. Thus begins one of the most interesting friendships ever to appear in a manga series.

Doraemon

ドラえもん

Gatou, Shouji

Shiki, Douji

Jindai High School was a relatively safe place, right up until Sousuke Sagara transferred there. A total nut, he wreaks havoc on the school's student body and gets into a world of trouble with the teachers! But there's more to Sousuke than meets the eye—not just a hell-raising student, he's actually a member of an elite military unit, on an undercover mission to protect the beautiful schoolgirl Kaname Chidori from the KGB.

(Source: TokyoPop)

Full Metal Panic!

フルメタル・パニック!

Kawakami, Minoru

Satoyasu

The story is set in a distant future where Japan is divided into feudal territories and conquered by other countries. There is a floating city named Musashi that is composed of eight ships in the skies. A war that will determine the fate of the world will be fought by students on the Musashi.

In the far future, humans abandon the devastated Earth and move to the upper world "Tenjou." But Tenjou and the law of causation collapse due to a war and humans are forced to return to the Earth, which has turned into an inhabitable planet except for Shinshuu area in the Far East. Shinshuu is too small to accommodate all the humans, so they duplicate the area and create "Juusou Sekai" in a parallel world. In order to rebuild Tenjou and the law of causation, the returned humans start reproduction of the history from B.C. 10,000. When the reproduction proceeds to A.D. 1413, a war breaks out in Shinshuu and Juusou Sekai falls onto the original world. The humans living in Juusou Sekai lose their land and invade the original world. People in Shinshuu surrender and the land is divided by the invaders from Juusou Sekai. They try to resume the history reproduction from A.D.1457, but the update of the history terminates in A.D.1648. A rumor of apocalypse begins to spread the world.

Kyoukaisenjou no Horizon

境界線上のホライゾン

Suzuki, Julietta

Odette is an android created by the young talented scientist Dr. Yoshizawa. Wanting to find the ultimate difference between humans and his android, Odette decides to persuade Dr. Yoshizawa to enroll her in a local high school. Follow Odette's adventures as she ventures through high school, in search of the true meaning of being a human.

(Source: Tokyopop)

Karakuri Odette

カラクリオデット

Sorachi, Hideaki

During the Edo period, Japan is suddenly invaded by alien creatures known as the Amanto. Despite the samurai's attempts to combat the extraterrestrial menace, the Shogun soon realizes that their efforts are futile and decides to surrender. This marks the beginning of an uneasy agreement between the Shogunate and Amanto, one that results in a countrywide sword ban and the disappearance of the samurai spirit.

However, there exists one eccentric individual who wields a wooden sword and refuses to let his samurai status die. Now that his kind is no longer needed, Gintoki Sakata performs various odd jobs around town in order to make ends meet. Joined by his self-proclaimed disciple Shinpachi Shimura, the fearsome alien Kagura, and a giant dog named Sadaharu, they run the business known as Yorozuya, often getting caught up in all sorts of crazy and hilarious shenanigans.

[Written by MAL Rewrite]

Included one-shots:
Volume 1: Dandelion
Volume 2: Shirokuro (Black and White)
Volume 24: 13
Volume 38: Bankara-san ga Tooru

Gintama

Gin Tama

銀魂

Oosaki, Tomohito

Novel of the second Gintama movie, written by Oosaki Tomohito, the same author of Ginpachi-sensei.

What would have happened if the Shiroyasha never existed?

Edo is thrown to chaos by a mysterious cause. Sakata Gintoki, now lives in a world where the future has changed, without him. What has happened to the Yorozuya?

Gintoki, who is now a ghost of the past, must once again carry the burden in order to save his friends. He must finish the biggest job ever, which may be the final job of Yorozuya.

Gekijouban Gintama: Kanketsu-hen - Yorozuya yo Eien Nare

劇場版 銀魂 完結篇 万事屋よ永遠なれ

Collection of unpublished stories from Doraemon.

Doraemon Plus

ドラえもん プラス

Hayashida, Q

Zaha Sanko's body has great and terrible powers–they say that possessing his bones will grant you any wish, even the desire to become ruler of the universe. But Sanko is still a teenage dude with his own life, and he isn't about to let every monstrous lowlife in the galaxy rip him limb from limb. He and his skeletal buddy Avakian will use their dark powers to fend off any murder attempts while they search space for whomever put this curse on Sanko's bones...because killing them might end the madness. (And then Sanko can celebrate with his favorite spaghetti.)

(Source: Seven Seas Entertainment)

Dai Dark

大ダーク

Takahashi, Rumiko

What would you do if a tiger skin bikini-clad alien followed you to school every day? Poor Ataru's life has never returned to normal since volatile extraterrestrial princess Lum fell for him. Now an excruciatingly wealthy and genteel rival, Mendo, adds to Ataru's torment. Not to mention an unending stream of extraordinary classroom visitors and educational materials including incompetent cherry blossom spirits, a legendary nightmare-eating tapir, and a fourth-dimensional camera that breaches alternate realities.  

(Source: VIZ Media)

Urusei Yatsura

Lum*Urusei Yatsura

うる星やつら

Nightow, Yasuhiro

Much of the damage attributed to "Vash" is caused by the activities of bounty hunters who are after the 60,000,000,000$$ (sixty billion "double dollars") reward on Vash's head for the destruction of a city called July. Vash does not clearly remember the destruction of July, and only wants "love and peace," as he puts it; though he is a gunfighter of inhuman skill, he uses his weapons only to save lives wherever he can.

As the series progresses, more is gradually learned about Vash's mysterious history and the history of the human civilization on Gunsmoke, the desert planet the series is set on. The series is often humorous in tone, but at the same time it involves very serious character development and especially in later episodes it becomes quite emotionally intense. Vash is occasionally joined by a priest, Nicholas D. Wolfwood, who is almost as good a gunfighter as Vash himself, and later is targeted by a band of assassins known as the Gung-Ho Guns for reasons which are mysterious at first.

Trigun evolves into a very serious discussion of the nature of morality, posing questions such as: What is the nature of morality? Can we judge different moral codes? If a person is forced to betray their moral code, does that betrayal invalidate that moral code, and can the person still try to live up to that moral code? Can the person find redemption from their wrongs, and if so, how?

(Source: Wikipedia)

Included one-shot:
Volume 2: Trigun (pilot)

Trigun

トライガン

Tanigawa, Nagaru

Tsugano, Gaku

Kyon is your ordinary high school freshman who has long given up on his childhood dreams of encountering the fantastic and supernatural…or so he thought. From the very first day of school, his classmate–the beautiful but eccentric Haruhi Suzumiya–makes it very clear that her only desire is to meet aliens, time travelers, and psychics! A chance conversation between the two inspires Haruhi to form the SOS Brigade, a school club created for the sole purpose of getting these supernatural beings together. The initial members consist of the mute bookworm Yuki Nagato, the timid but voluptuous Mikuru Asahina, and the polite and ever-smiling Itsuki Koizumi. By the end of this first volume, Kyon quickly finds out that these seemingly "helpless victims" of Haruhi's are actually members of secret organizations–both futuristic and alien–keeping watch over Haruhi as she is the pinnacle of some major calamity on the horizon…

(Source: Yen Press)

Suzumiya Haruhi no Yuuutsu

The Melancholy of Haruhi Suzumiya

涼宮ハルヒの憂鬱

Imaishi, Hiroyuki

Enokido, Youji

Tsurumaki, Kazuya

Naota's life is not simple. He lives with his eccentric father and grandfather in a city distinguished by a gigantic hand-iron shaped factory perched on a hill. His brother's ex-girlfriend makes passes at him. And to top it all off, an impish, playful alien has run him over with her Vespa and smacked him in the head with a bass guitar! Little does he know that this is only the beginning of his involvement in an interplanetary ideological war.

(Source: Tokyopop)

12 Manga Like Ai Tenchi Muyou!