Space Brothers

239
"A big brother must always stay ahead of his younger brother. That is my responsibility as the older sibling"—these are the words that have always motivated Mutta Nanba to try his best when it came to his younger brother Hibito. So naturally, in the summer of 2006 when the Nanba brothers witness something strange in the night sky, Hibito declared that he would become an astronaut and travel to the Moon, while Mutta countered with the affirmation that he would go to Mars. That was the promise they made to each other. Now in 2025, while Hibito is working with NASA and preparing to become the first Japanese to land on the moon, Mutta has been fired from his job in an automotive development company. Having difficulty finding another job, Mutta is given a lifetime opportunity when he receives a letter from JAXA—the Japan Aerospace Exploration Agency—telling him that he's been accepted to participate in the next astronaut selection. As if fate has given him a chance to fulfill the promise he made all those years ago, Mutta undertakes the difficult challenge of going to space. [Written by MAL Rewrite]

Super Dragon Ball Heroes: Big Bang Mission!!!

7,574
The Prison Planet was only the beginning of Fu's experiments... Based on the experimental data collected at the Prison Planet, Fu finally begins his real experiment! What is Fu's real goal, and what is his real power? Goku and companions from and appear! An experiment involving the whole universe and space-time! (Source: Dragon Ball Wiki)

Star Wars: Leia, Princess of Alderaan

465
The never-before-told story of how young Leia Organa comes to join the rebellion against the evil Empire. A young Princess Leia spends her days learning the ways of politics, aiding those in need and preparing for the traditional ceremony in which she declares her intention to one day rule Alderaan. But as Leia prepares herself to be named the heir of the throne, she becomes aware of the growing distance between her and her parents, who behind closed doors are leaders of the newly formed rebellion. Upon learning her parents' secrets, Leia must now make a choice between her responsibility to the people of Alderaan and her responsibility to save a galaxy crushed by the rule of the Empire. (Source: Yen Press)

Jupiteria

151
The year is 2150, and humanity has entered the Space Age of Exploration. The largest planet in the solar system, Jupiter, in particular is a treasure trove of natural resources. Seeking those resources, humanity has built up numerous biospheres in its vicinity. Those who are born in zero gravity in the Jupiter Zone are known as "Jupiterians". Rico Alberoni is one such person. He lives on Callisto, Jupiter's fourth moon. For him each day was a torment — bullied at school for his peculiar Jupiterian constitution and poked and prodded like a guinea pig at the lab. Until one day he met a man who makes his living recovering wrecked spaceships, a "salvager" named Reiji... This is a story about a boy who couldn't seize today cutting his own path into the unknowable tomorrow. This is an outer space frontier tale for a new generation!

Sazan & Comet Girl

257
Sazan, a young man from Earth, works on other planets and has seen his share of galactic oddities. But when he meets Mina, a red-headed girl who zooms into his life on a space scooter, he knows he's run into someone special. Mina contains shocking power within her body—a power coveted by space pirates who hope to steal it from her. Mina zooms out of Sazan's life almost as quickly as she arrived, but Sazan is determined to find her again...no matter how far he has to chase her across the galaxy. (Source: Seven Seas Entertainment)

Norman

5
In 1968, appears in the sky a mysterious ghost moon. Five hundred million years before, on the moon, the Moko Empire is threatened by the Gerdans, a terrible warlike nation. Prince Norman then starts the search for beings with supernatural powers to help him fight his enemies. Taku, a young Japanese boy of our time, is then chosen and teleported at the prince's era to integrate a special fighting units. While our young hero realizes its growing psychic powers, the moon is under alert and the destiny of an empire and maybe...much more are in the hands of the chosen ones!

Kidou Senshi Z Gundam Define

193
Ensign Reccoa Londe has provided the AEUG with information regarding possible mobile suit development at the civilian colonies of Green Noa. Lieutenant Quattro (Char Aznable) with his wingmen Lieutenant JGs Apolly (Andy) and Roberto (Ricardo) head to the colony to investigate. On Green Noa 1, Kamille Bidan is rushing to the spaceport where the Temptation, a ship a former One Year War ace is on, is docking. He's hoping to get an autograph from the famed Captain Bright Noa. As Bright explains that he's on duty, Jerid and company interrupt the two. Jerid smacktalks Bright for receiving a two rank demotion upon refusing to join the Titans and grabs Kamille's photo saying he should sign it as an elite member of the Federation. The two get into a scuffle and Kamille is hauled off for questioning. Matosh questions Kamille about being an AEUG insider but just then he's freed after his story checks out. Just as the handcuffs come off, the Gundam MK-II crashes into the building... (Source: MU)

Space Traveller Robo & Usakichi

153
Beyond the solar system, there is a small planet where a young boy named Robo lives. He hoped that his wish for a friend would come to pass with every day that goes by. One day a mysterious rabbit humanoid, Usakichi, falls from the sky. Usakichi is a fugitive on the run from the army and befriends Robo to get a spaceship. However, the army catches up with Usakichi. Wanting to protect his first friend, Robo uses the item that his late father forbade him to use. After saving his Usakichi, Robo finds out that this item has the power to destroy planets. The space road movie adventure starts. (Source: Sweet Indulgent)

Mobile Suit Gundam Valpurgis

417
The story takes place in Universal Century 0089. The magazine describes the manga's protagonist Mashiro Oaks as a high school student on Side 2 Colony "Olympus." He gets the high score on a game titled "Walpurgis Night" and, by distributing the video on an underground network, he gets noticed. The tagline reads, "Young Man, defy your cursed fate!!" (Source: ANN)

Astro

524
Five years ago, a powerful meteor shower rained down on the moon's Lunar Observatory Colony and slaughtered its three ill-fated astronauts. Below on Earth, the space company NAXA faced severe criticism for their failure to protect them. In the present day, astronauts Plato, Abbot, and Tycho land on the moon for the first time since the tragedy. Their task is to repair the ruined colony—but life-threatening circumstances and twisted resolves threaten to add this mission to the list of space disasters. [Written by MAL Rewrite]

Agravity Boys

739
The year 2118... Four young astronauts head out to the stars to find humanity's new frontier...or so they thought! Two days after they depart, earth is devoured by a black hole! Plunged into a destiny they cannot escape, these unique young men reach their destination of Alpha Jumbro and plan to live out the rest of their lives there. How will humanity survive in this wacky space-survival comedy?! (Source: MANGA Plus)

élDLIVE

26
For as long as he can remember, 14-year-old Chuuta Kokonose has been pestered by a mysterious voice in his head. Due to this, his unknowing classmates tease him for having an odd habit of talking to himself. One day, Chuuta is followed home by a three-eyed, jellyfish-like creature who abruptly shoots him with a beam of light. He suddenly finds himself in a room filled with even more strange-looking creatures—in a place he soon discovers to be a space police station. There, he is told by Laine Brick, the chief of the solar system bureau, that he has been selected as a suitable candidate to join their agency ēlDLIVE. But Misuzu Sonokata—Chuuta's classmate and crush who turns out to be an ēlDLIVE member—is opposed to him joining, arguing that he does not have the qualities of an officer. Provoked by Misuzu's remarks and at the insistence of the voice in his head, Chuuta decides to take the qualifying exam to join the agency. However, the exam leads to him discovering that the identity of the strange voice in his head was an alien living in his body all along. follows Chuuta, Misuzu, and the rest of the solar system bureau as they endeavor to protect the citizens and the public order of the universe. [Written by MAL Rewrite]

Legend of the Galactic Heroes (New adaptation)

954
In humanity's distant future, two interstellar states—the monarchic Galactic Empire and the democratic Free Planets Alliance—are embroiled in a never-ending war. The story focuses on the exploits of rivals Reinhard von Müsel and Yang Wen Li as they rise to power and fame in the Galactic Empire and the Free Planets Alliance. (Source: Wikipedia)

Captain Harlock Space Pirate: Dimensional Voyage

201
When Tadashi Daiba's father is murdered by invaders known as the Mazon, he becomes frustrated in the face of the Earth government's flippant attitude. Landing himself in prison, Tadashi finds himself invited aboard the battleship Arcadia, controlled by none other than the legendary Captain Herlock. Joining his crew on their journey through space, Tadashi's future will lead him to confront not only the Mazon, but the many other forces across the universe threatening humanity's very existence. (Source: Seven Seas Entertainment)

When I Woke Up, I Got the Strongest Equipment and a Starship, so I Went and Became a Mercenary in Order to Live as I Please while Aiming for a Detached House

7,447
Sato Takahiro was an ordinary office worker and hobbyist gamer until the day he woke up on a spaceship–one that strangely resembled a craft from a favorite space-shooter game. With a decked-out ship, a crew full of babes, and a fantastic universe to explore, he’s going to make the most of his good luck and create the life he’s always dreamed of! (Source: Seven Seas Entertainment)

Outlaw Star

205
Gene dreams of life as an Outlaw, and fate smiles on him as he seems to suddenly wind up with a great job. But as things go awry, and he finds himself the new owner of the fastest, most technologically advanced space ship in the galaxy. Unfortunately, it's stolen and the owners want it back... Along with his partner Jim and the lovely Melfina, Gene must fight his way across the galaxy battling pirates, aliens, and assassins as he attempts to discover the secrets of the Outlaw Star. (Source: ANN)
Total: 32 stories
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