
If you're looking for manga similar to Robot Keiji, you might like these titles.
In the futuristic city of Judoh, some dangers are too much for the police--they require Special Force agent Daisuke Aurora and his robot partner J! When the city's massive underworld is rocked by upheaval, Daisuke and J must struggle to contain gang bosses battling for supremacy. But is there more going on than meets the eye? Who is behind the sudden rise of a previously minor politican to the top of Judoh's underground? How are the mysterious Celestials, who watch Judoh from above, involved? And what secrets lie hidden in Daisuke's own past--and inside J's memory?
In the early part of the 21st century, clouds of toxic microbes cover most of the planet, forcing the citizens of Newport to wear masks when outside. In this harsh world, a single criminal's malicious deeds have incited the Japanese police to take to the street in Tanks! Having already stolen the experimental organism Greenpeace Crolis, Buaku and his henchmen Annapuma and Unipuma set their sights on bigger game including a prototype mega-tank and the governments only sand-crawler submarine. Join Leona Ozaki, Alcuad Solte, Charles Brenten, and the rest of the Newport Station Tank Police as they try to uncover the method behind the gangster's madness and catch him before his diabolical plan comes to fruition.
In a world where humans and androids co-exists, the human population is rapidly declining. As part of a plan to preserve the species, high school student Kotaro Shiga is placed into a state of suspended animation. Waking up a century later, he finds a very changed world where androids are in charge and humans are very scarce. The Androids, whose memories only extend back 22 years, have rewritten history and believe it is they who created humans. With the help of an exiled human prince and an android distressed by his own limited memory, Kotaro is out to awaken his fellow "sleepers" and teach the world its true history.
Brian, a robot made at the same time as Biker and Walter of the Tokkei Winspector task force, has been brainwashed by a renegade scientist by the name of Professor Hirosaki. Can the members of Tokkei Winspector beat the brainwashed Brian, or will he destroy all the motorbikes in the world? Only time will tell.
In this prequel to the hit science fiction crime drama anime series, Psycho-Pass: Inspector Shinya Kogami reveals how the legendary Enforcer was once an ace detective! Working within the city-regulating Sybil System, Inspectors must fight crime in a future where a single number measures your criminal tendencies and determines if you are useful to society! An artificial organ with a numbered brand is the key piece of evidence that leads Section 3 to a network of organ smuggling! They must set up a complicated trap in order to catch the culprit! However the real perpetrator may not be who they think it is...
A woman's young son is kidnapped and the only clue to his disappearance is a note starting with the words "This is a quiz." What follows is a fast-paced and stylish whodunnit which leads chief investigator Kaoru Kiriko of the Special Investigation Team down a trail of increasingly perplexing riddles that all the while seem to mock the efforts of the police. Street-smart Kaoru may be the kidnapper's intellectual match, but as she gets closer to her mark, she finds herself becoming the hunted rather than the hunter.
Pullan Gwen is an engineer framed as a traitor after an energy crisis. In order to prove his innocence, he flees and comes across a mysterious mech. The journey of Pullan Gwen as he goes from place to place gathering allies and enemies.
When freelance reporter Sybel finds out about a potentially hot scoop involving a crashed military plane, she has no idea what she is about to get herself into. The plane, she discovers, was carrying two top-secret prototype robots known as M-66. The problem? The mission of these programmed killers is to assassinate the granddaughter of their creator. Now, Sybel must race against the clock to help save this innocent girl's life, while protecting her own...