Science fiction opens doors to all kinds of fascinating speculative scenarios that explore futuristic technologies, alternative sociopolitical systems, and scientific theories that are only distant possibilities in the modern world. However, in anime, sci-fi often functions more as a magical genre than something concerned with realism in its depictions of the future.
On the opposite end of the spectrum from the countless science-fantasy stories anime favors is hard sci-fi – a subgenre that prioritizes scientific accuracy and logic when developing futuristic scenarios. While hard sci-fi is rather hard to come by in anime, these series excel at depicting imaginary technological wonders as if they could truly be possible in reality.
Moonlight Mile Honestly Portrays the Plights of Reaching for the Stars
The protagonists of Moonlight Mile, Gorou Saruwatari and Jack “Lostman” Woodbridge, begin as mountain climbers accomplished enough to scale Mount Everest. At its summit, however, a new dream literally rises before their eyes: spotting the International Space Station inspires them to reach for the stars.
From there, Gorou and Lostman take different paths to join the ISA’s newest program, Nexus, which researches a new energy source discovered on the Moon. Moonlight Mile does not depict a distant, impossible future, but focuses on realistic plausibilities, astrophysics, and existing spacefaring practices, exploring grounded space travel mechanics and the political aspects of the space race, all flavored with mature interpersonal drama that prevents the story from feeling too rigid.
Rocket Girls Is Both Comedic & Surprisingly Committed to Scientific Realism
An eccentric mix of humor, CGDCT antics, and hard science fiction, Rocket Girls begins with a high school girl, Yukari, searching for clues to her father’s disappearance. However, she receives a surprising deal from a private space agency that agrees to help her if she takes part in their new experimental program requiring lightweight pilots.
The absurdity of Rocket Girls stops at its whimsical premise; from there, the show commits fully to realistic space science developed with assistance from Japan’s national space institute, JAXA. The complex scientific aspects of the show, however, are balanced by endearing character moments between Yukari and her fellow recruits, creating a well-rounded hard sci-fi comedy.
Starship Operators Turns Space Warfare Into High-Stakes Reality TV
Starship Operators opens with a rather unique premise: discovering their small home planet has been conquered, a group of Defense University cadets decide to fight a war for liberation with a single ship, Amaterasu. However, interstellar warfare is a rather costly endeavor, so they strike a deal with a TV network to turn their fight for freedom into a reality TV show.
While the concept of Starship Operators seems suited for a goofy sci-fi comedy, the actual show is rather dramatic, high-stakes, and surprisingly science-based in its depictions of space combat. The combatants’ decisions are supported by logic and rely on intelligent tactics, while the mechanics of how weaponry works in space follow clear, realistic rules instead of fantastical cop-outs.
Knights of Sidonia Realistically Portrays Survival in Space
In the futuristic world of Knights of Sidonia, the remnants of humanity travel space in search of a new home while fleeing from Earth’s destroyers, the shapeshifting Gauna aliens. The series’ setting is in no way grounded, leaning towards the space opera genre, and the show also features giant mechs, which usually disqualifies most shows from being considered hard sci-fi.
Nonetheless, Knights of Sidonia takes a very realistic approach to depicting survival in space. It pays attention to astrophysics and bioengineering, as well as openly acknowledges the challenges humanity would realistically face surviving on a colony ship. At the same time, Knights of Sidonia incorporates some soft sci-fi elements, like mysterious aliens and giant robot battles, resulting in a multifaceted and entertaining experience.
Crest of the Stars Is an Awe-Inspiringly Nuanced Space Opera
Space operas in anime hardly ever prioritize realism, which makes Crest of the Stars, a staple of ‘90s military sci-fi, stand out due to its meticulousness and lack of logical fallacies. The story takes place in a grand spacefaring world and followsJinto, whose home was annexed by the powerful Abh Empire, Lafiel, a princess he meets at the Abh military academy, and the grand war into which they are accidentally drawn.
While Crest of the Stars is certainly fantastical, it makes a point of explaining all its futuristic concepts, from superluminal travel to spacecraft and weaponry, in a way that feels realistic and surprisingly plausible. The world and characters of the show are developed with the same painstaking attention to detail, satisfying both hard sci-fi fans and those fond of engrossing, character-driven space operas.
Twin Spica Combines Space Travel Themes With Grounded Coming-of-Age
While sci-fi is usually associated with grand, epic adventures, it also has a place for more intimate slice-of-life stories likeTwin Spica. In the alternate history the series develops, Japan’s first manned spaceflight ended in a tragedy that took many lives, including that of Asumi Kamogawa’s mother. Despite the trauma, Asumi grows up wanting to become an astronaut, and the show follows her journey as a student at Tokyo Space Academy.
While mostly focused on coming-of-age and grounded themes, Twin Spica pays close attention to developing the sci-fi angle of its story. The astronaut training is depicted as extremely thorough and realistic, and the technology in the series doesn’t require audiences to suspend their disbelief. The only fantastical part of Twin Spica is Asumi’s companion – a supportive ghost, Mr. Lion.
Armored Trooper VOTOMS Has a Realistic Approach to Mecha Combat
Even “real robot” mecha anime usually feature some degree of fantasy and speculative science to make giant robot fights plausible in the first place. The 1983 classic Armored Trooper VOTOMS, however, is a rare mecha show that falls distinctly into the hard sci-fi category thanks to its realistic approach to military science fiction and grounded, gritty, mass-produced mechs.
The protagonist of the series is an Armored Trooper pilot, Chirico Cuvie, who, after being framed by his own superiors, fights for survival amidst galactic war and political conspiracies. Combat in Armored Trooper VOTOMS, despite its futuristic setting, feels bleak and grounded, with mechs acting as realistic combat suits instead of the typical blend of mysticism and machinery.
Space Brothers Follows Two Brothers’ Journey to Fulfill Their Dream of Spacefaring
Space Brothers is a hard sci-fi anime that feels so grounded, many don’t regard it as a slice-of-life drama instead of sci-fi. The show revolves around two brothers, Hibito and Mutta, who both dreamed of space from a young age. However, only Hibito ends up achieving his ambitions as an adult, and, with his brother about to go to the Moon, Mutta recalls his past aspirations and sets his eyes on Mars.
The only fictional part of Space Brothers is, fairly, JAXA sending astronauts to the Moon and manned spaceflight to Mars being a possibility. Other than that, Space Brothers sticks to reality, depicting the vigorous training program for new astronauts and psychics of space exploration with a heartfelt story of pursuing one’s dreams at its heart.
Ghost in the Shell Explores the Social & Psychological Hurdles of Technological Advancement
While Ghost in the Shell is arguably more cyberpunk than hard sci-fi, it definitely takes scientific logic and realism more seriously than most similar titles. Set in a futuristic dystopia where rapid technological advancement has led cybercrime to spike, most entries in the series follow a counter-cyberterrorist unit, Public Security Section 9, and its leader, Major Motoko Kusanagi, a cyborg with a fully prosthetic body.
The technology in Ghost in the Shell is unimaginably advanced, yet the show makes an effort to justify it scientifically, with the original manga going particularly in-depth about futuristic science. On top of technical explanations, Ghost in the Shell is concerned with the psychological ramifications of living in an advanced dystopia and how things like cyberization affect people’s sense of self.
Planetes Focuses on the Mundane Struggles of Space Garbage Collectors
The favorite anime of all hard sci-fi fans, Planetes follows not heroic space warriors or brilliant engineers but a much less glorified group of cosmic travelers – a team of garbage collectors cleaning up space junk at the orbital Debris Section. Thanks to its grounded premise, Planetes doesn’t feature any technology that feels out of reach, yet pays attention to making the mundanity of space life as realistic as possible.
It’s hard not to take Planetes’ meticulous worldbuilding seriously when the story explains every small detail of its heroes’ unusual lives and work so attentively. No sci-fi concept in Planetes feels unattainable in the not-so-distant future, and a similar level of realism applies to how the series develops its characters’ relationships, struggles, and circumstances of their job.