Tanaka, Yoshiki

Katou, Naoyuki

Kamoshita, Yukihisa

In the far future, two young military leaders rise above their peers. The invincible genius Reinhard von Lohengramm is matched only by the unbeatable magician Yang Wen-li; though the two share a profound respect for each other, they meet on the battlefield not as comrades but as bitter adversaries. Commanding thousands of warships and millions of soldiers, they lead giant space fleets into battle on behalf of the two interstellar states that have wrested for control of the Milky Way for over a century and a half. 

The Galactic Empire, an absolute monarchy ruled by Kaiser Friedrich von Goldenbaum IV and an entrenched nobility, seeks to suppress the rebels daring to oppose the inviolable crown. The Free Planets Alliance, a representative democracy led by a corrupt High Council, degenerates as its elected leaders⁠ use war and conflict as a way to win popular support. Reinhard is a minor noble who became a High Admiral through his strategic brilliance and his sister's position as the favored concubine of the Kaiser, while Yang is an avid historian and reluctant commodore hailed as a hero despite only using his tactical prowess to navigate around his leaders' incompetence. On opposite sides of the galaxy, the two men have wildly different visions for the future: Reinhard dreams of uniting mankind under his iron fist, while Yang wants only to carve a path to lasting peace. As the war rages on, Reinhard and Yang each strive for their ideals and secure their place among the stars as the leaders of a new era of galactic heroes.

[Written by MAL Rewrite]

Ginga Eiyuu Densetsu

Legend of the Galactic Heroes

銀河英雄伝説

Nagai, Go

Soft-hearted Akira Fudou has always been somewhat of a pushover. When he reunites with his childhood friend, Ryou Asuka, in a fateful encounter, Ryou reveals to him the terrifying reality of his father's research: demons exist and are planning to claim possession of the earth once again.

Eager to help his friend save humanity, Akira agrees to attend Black Sabbath, a party filled with depravity and corruption, to attempt to merge with a demon. A near-death encounter causes him to unify with Amon, a demon feared amongst even his own kind. Together they form Devilman, a combination of Amon's strength and Akira's pure heart.

After uniting with Amon, Akira begins to fight against the demons with his newfound power, desperate to stop the downfall of all human civilization.

[Written by MAL Rewrite]

Devilman

デビルマン

Takaya, Yoshiki

Sho and his friend, Tetsuro, stumble upon a strange orb-like mechanism, the Guyver Unit, in the woods. It physically bonds with Sho and turns him into the alien soldier, Guyver. His mission is to protect the Guyver Unit from the Japanese corporation known as Chronos. They are after it and two other units just like it. To retrieve the object, they send out vicious monsters known as Zoanoids. So no one is safe in Sho's life; not even himself.

Kyoushoku Soukou Guyver

Bio-Booster Armor Guyver

強殖装甲ガイバー

Ishinomori, Shoutarou

Cyborg 009 is the story of a half-Japanese juvenile delinquent, Shimamura Joe AKA 'Cyborg 009.' 'Black Ghost,' a top-secret organization bent on promoting global warfare, kidnaps Joe along with eight other unwanted members of society from the four corners of the world and turns them into cyborgs. Though the organization intends to turn the group into super-powered killing machines, it's not long before Joe and his new companions rebel against Black Ghost and make their escape with the help of an old scientist.

Once Joe and friends have freed themselves, Black Ghost sends a series of other cyborgs and giant robots in hot pursuit. Using their new powers and abilities, our heroes stay one step ahead of Black Ghost and its evil machinations, but can they save the world from its diabolical scheme?

(Source: Tokyopop)

Cyborg 009

サイボーグ009

Otomo, Katsuhiro

Nagayasu, Takumi

Orbiting serenely above a long-ago poisoned earth, the last bastion of human civilization is the space colonies. After a terrorist attack, the colonists are forced into exile on the blighted planet below. In the confusion, a young mother is separated from her family and is flung into a bleak, uncertain future... But Sarah will not rest until she finds her children.

(Source: ANN)

Sarah: The Legend of Mother Sarah

The Legend of Mother Sarah

沙流羅 -The Legend of Mother Sarah-

Matsumoto, Leiji

In the future, humanity has achieved a vast starfaring civilization, but is slowly and steadily succumbing to ennui or despair, often due to defeat and subjugation by a foreign invader. Rising against the general apathy, Herlock denies defeat and leads an outlaw crew aboard his starship Arcadia to undertake daring raids against Earth's oppressors. Their primary oppressors are the Mazone, a race of organic plant-based alien women who explored Earth in the mythic past and are now back to reclaim it.

(Source: Wikipedia)

Uchuu Kaizoku Captain Herlock

Captain Harlock

宇宙海賊キャプテンハーロック

Adachi, Mitsuru

The story is set in a place very similar in appearance to Earth in the Edo period. However, Adachi (the mangaka) regularly reminds the reader all throughout the series that the setting is another planet in the distant future which just happens to look like Earth.

After the death of his mother, Shichimi sets out to join his step-brothers and -sister who live together in Karakuri Tenement, a place provided by the father they have never met. He finds out that each of them had different mothers (all of whom have died), but were fathered by the same man. Not long after Shichimi's arrival, the siblings decide to journey to visit the graves of each of their mothers. On this journey, they encounter many dangers.

(Source: Wikipedia)

Nijiiro Tougarashi

虹色とうがらし

Manabe, Jouji

It`s face-to-face confrontation when Kahm stares down her father and refuses to end her relationship with Tetsuya. In retaliation, her father sends a punitive fleet to Earth -- with orders not only to crush the rebellion but to annihilate the entire solar system!

(Source: Amazon)

Outlanders

アウトランダーズ

Ryuu stows away on a space vessel, only to be found by the crew when it's far to late to return to Earth. So they stick him in a spare sleep capsule instead. Things take a turn for the unexpected, however, when Ryuu wakes up to find himself the sole survivor of the expedition, the spaceship having crash landed on a grossly mutated and wholly unfamiliar Earth.

Joining forces with fellow survivors from a different crash, Ryuu and his comrades fight to survive on this new and deadly Earth as they search for any humans that might have made it through the mysterious apocalypse.

(Source: MU)

Ryuu no Michi

リュウの道

Michihara, Katsumi

Faithful to the novels aside for some changes that may be considered major e.g. characters changed from male to female.

Emeraldas navigates the sea of stars—and swears to do so until the flame of her life is extinguished. Aboard her ship, the Queen Emeraldas, she sails in search of a certain object, and along the way encounters the passions and tragedies of those who dare brave the infinite reaches of space. 

(Source: Kodansha Comics USA)

Included one-shot:
Volume 4: Emeraldus Versus Herlock

Queen Emeraldas

クィーン・エメラルダス

Yokoyama, Mitsuteru

Dr. Kaneda was developing experimental giant robot warriors to fight the allies during the Second World War, but before his creations could see action, Allied bombs destroyed the facility and killed him. A decade later criminals discovered two of the surviving prototypes, #26 and 27 in the series, and used the remote controlled robots to commit a number of crimes. Young Shotaro Kaneda, the twelve year old son of Dr. Kaneda, did some investigating and discovered that the mob were hunting for the twenty-eighth robot in the series, rumoured to be the most powerful of them all. Racing the villains, Shotaro discovers the robot first, along with Dr. Shikishima, a colleague of his father who was also believed to be killed by the Allied bombing. Together the two prevent Tetsujin 28-go (the robot's official designation) from falling into the hands of the bad guys and decide to dedicate him to peace rather than war.

Manga Like Akeboshi no Jenny

Ginga Eiyuu Densetsu

Devilman

Kyoushoku Soukou Guyver

Cyborg 009

Sarah: The Legend of Mother Sarah

Uchuu Kaizoku Captain Herlock

Nijiiro Tougarashi

Outlanders

Ryuu no Michi

Ginga Eiyuu Densetsu

Queen Emeraldas

Tetsujin 28-gou