Creator/OsamuTezuka's ''Astro Boy'', called ''Tetsuwan Atom'' ("Mighty Atom" or literally "Iron Arm Atom") in Japan, began life as a manga in 1952, and has been [[Anime/AstroBoy brought to television as an anime three times]], in 1963, 1980, and 2003. It's a historically significant series, as Tezuka's style defined the look of iconic anime and manga, and the English dub of the 60s show became one of the first popular animes in America.

In the [[{{Zeerust}} unimaginably distant future year of 2001]], Dr. Tenma, of the Institute of Science, loses his son in an accident. Half-mad with grief, the roboticist creates "Tetsuwan Atom," a rocket-powered android in his late son's image, and programs him to be a "good little boy." After a series of tragedies and misadventures, including abandonment by his "father," Atom is rescued and adopted by Dr. Ochanomizu, and decides to take up crime fighting. This decision soon leads him into all manner of danger and excitement, as he battles mad scientists, evil aliens and giant robots.

''Tetsuwan Atom''/''Astro Boy'' is something of a cultural phenomenon in Japan; the character is virtually a folk hero. For example, on April 7, 2003 - the date of Astro Boy's "birth" within the show - the third TV series debuted and celebrations were held all over the world. The largest, of course, were in Japan, but even across America and Europe Japanese neighborhoods threw parties to commemorate the event. A commemorative plaque stands in the Tokyo district that the manga identifies as Atom's birthplace.

The third TV series inspired a video game, ''VideoGame/AstroBoyOmegaFactor'', that is generally held to have avoided TheProblemWithLicensedGames; later a second game was released for the PS2 that unfortunately did ''not'' avoid TheProblemWithLicensedGames. A [[WesternAnimation/AstroBoy CGI movie produced by Imagi Animation Studios]] was released in October 2009, also bringing to the table a mediocre movie-based game that spanned several consoles. In early 2011, an iPhone/iPod game called ''Astro Boy: Tap Tap Rush'' was released, first in Japan and then later in the US. For a video game series that was directly inspired by this franchise, ([[DivorcedInstallment and was in fact going to be an adaptation before the company lost the license]]) see ''VideoGame/MegaManClassic''.
!!The ''Astro Boy'' manga provides examples of the following tropes:

* AbusiveParents: [[spoiler:Dr. Tenma]] is an early {{manga}} example. After [[spoiler:he lost his son in a traffic accident]], he [[spoiler:built Astro Boy as a ReplacementGoldfish]]. Shortly afterwards, he [[spoiler:realized a ReplacementGoldfish is not a substitute for the original thing]], and he began to berate and scorn [[spoiler:Astroboy]] constantly, yelling him for such a nefarious crimes like being [[spoiler:unable to grow up]]. Finally he got fed up with him and [[spoiler:[[MoralEventHorizon sold him in slavery.]]]] Thank God that [[spoiler:Astro Boy was programmed to be a "good boy" and was taken in by Dr. Ochanomizu, who was an altruistic, kind man instilled and nurtured those traits in Astro Boy, or maybe he could have become a WoobieDestroyerOfWorlds.]]
* AllAnimeIsNaughtyTentacles: A DiscussedTrope. In the introduction to ''Count Bat'', Tezuka discusses the different attitudes toward sex and violence in Japanese and American cartoons and how it's helped to shape these cultures' perceptions of each other.
%% * AnyoneCanDie: Yes, we do mean ''anyone.''
* AssKicksYou: He has dual machine guns in his butt. Which, coupled by the fact he's half naked all the time is the [[ValuesDissonance main reason]] [[WidgetSeries Western audiences find Astro Boy strange]]. Or hilarious. Or [[BreadEggsBreadedEggs strangely hilarious.]] (This has been debated constantly, though. Some think the machine guns are in his hips, and with Tezuka's simplistic drawing style at the time, you could probably see why.)
* AuthorAvatar: The collected editions have introductions in comic-strip form, showing Tezuka in his studio talking "to camera" about the stories (and sometimes being visited by the characters, who suggest things for him to explain to the audience).
* BadassAdorable: Whatever else he may be, Astro is ''always'' this. May be the earliest example, and certainly the earliest in anime. (Of course, Astro is the earliest for a ''lot'' of things in anime.)
* BlueAndOrangeMorality: One story had Astro encounter an alien who had assisted in humanity's evolution. Said alien, having seen what has become of the human race, decides to destroy if in order to put Earth out of its misery. When Astro counters that there are good humans, the alien simply retorts that "Good" and "Evil" are strictly human concepts; as far as the rest of the universe is concerned, "All humans are worthless!"
* CombiningMecha:
** Gadem, a group of 47 androids who combind to form a giant centipede.
** One story had Astro himself becoming part of a combiner made up of other humanoid robots in order to fight a giant snow leopard who was actually a combination of billions of electricity eating space amoebas.
* CompletelyDifferentTitle: ''Tetsuwan Atom'' (which means "The Mighty Atom") became ''Astro Boy'' in English. This is possibly because there is already a character with that name in the USA.
* CompulsorySchoolAge: Astro Boy is sent to grade school with human children of his apparent age despite being a robot with a super-advanced AI. Sometimes this is explicitly said to be for the purpose of socialization, sometimes not. Subverted with Astro's robot "parents", who are also sent to school in a lower grade because they're actually younger than him.
* ContinuitySnarl: Dear lord, ''so very many of them''. Try to put the stories into a continuous timeline and the only thing you'll end up with is a headache.
* CyberneticsEatYourSoul: Averted. In one story, a terrorist organization [[spoiler:steals dogs and grafts their brains in mechanical, humanoid bodies]] in order to create loyal and utterly obedient soldiers. However, in the prologue of the story, Creator/OsamuTezuka argued as far as he was concerned, the soul or spirit of the being always endures, even it if is mechanized.
* DealWithTheDevil: Subverted in the retelling of Astro's origin in the Scara time travel arc. A suspicious-looking Japanese-American businessman offers to fund Dr. Tenma's project to create a [[ReplacementGoldfish robot boy]], ''if'' Tenma will let the man borrow the robot for ''one day''. [[spoiler:The man turns out to be a civil rights activist who only shows Astro how badly robots need rights themselves.]]
* DetectEvil: Astro's incorruptible heart is advanced enough to tell if someone is evil or a complete jerk.
* DrowningMySorrows: Volume 5 of the collected editions has an intro comic in which Osamu Tezuka talks about where he gets his characters from. Lampe and Kim san Kaku go out and get plastered at the end after they learn they were both designed after Tezuka's dorky elementary school classmates.
* EverybodyHatesHades: A major adversary, with a frightening horned appearance, is given the name Pluto.
%% * EvilCounterpart
%% * EvilutionaryBiologist
* FantasticDrug: In one issue, there was a drug called Yellow Horse which made the people who took it dance crazily.
* FantasticRacism: A major recurring theme. Humans in this future choose robots as scapegoats to society's problems.
%% * FluffyTamer: Uran
* FourFingeredHands: Since Tezuka's art style is influenced by Western Animation, Astro has four-fingered hands -- except when he doesn't. One of the volumes of the collected editions has a foreword in which Tezuka acknowledges and discusses the fact that he's been inconsistent on this point.
* TheHeroDies: [[spoiler:In the Scara arc, we see Astro's demise - which is directly linked to his birth.]]
* HugeGuyTinyGirl: The closest thing Uran ever got to a love interest was Pluto, who's at least two stories tall.
* HumongousMecha: While not a piloted mecha, Pluto comes close to being one.
%% * JustAMachine
* {{McNinja}}: A gag panel from the "World's Strongest Robot" arc. Mustachio asks why the Middle-Eastern villain's HyperCompetentSidekick dresses in black all-concealing robes, and he responds by producing a couple of throwing stars and announcing that he's really a ninja! Then the author steps in to announce that it's just a joke, and the story continues as if nothing had happened.
%% * MiniMecha: Lots of them!
%% * MoodWhiplash: Oh good golly, people and robots ''died'' in this manga. Usually on camera.
* MotherlyScientist: Dr. Ochanomizu is a Fatherly Scientist, who treats Astro as a human being and not just as an impressive bit of machinery.
* NeverSayDie: variation: Tezuka and co. had faith that kids could handle such heavy concepts as death, but ExecutiveMeddling on both sides of the Pacific forced them to tone it down. He does kill humans a few times in the manga, though, including an eco-terrorist about to throw a bomb into a room full of hostages & scads of American soldiers about to bomb a village full of innocent civilians during a time travel incident that put him smack-dab in the middle of UsefulNotes/TheVietnamWar.
* NoNewFashionsInTheFuture: The series is set in the early 2000s, but clothing hasn't changed much since the 50s (or, later on, the 80s).
%% * NotSoDifferent: You have human-hating robots and robot-hating humans.
* OmnidisciplinaryScientist: Dr. Ochanomizu, whose main background is in robotics, also comes up with inventions like a bomb that flash-freezes everything for miles around and even a device that can read minds (although considering he's the head of the Ministry of Science he may have had some help with these).
* OnlyOneMeAllowedRightNow: In the Scara time travel arc, Astro[[spoiler:'s lifeless body]] still exists by the time Dr. Tenma originally constructs him, and the newborn Astro can't be activated until [[spoiler:the older Astro is destroyed]].
* OurHeroIsDead: The "Blue Knight" saga ended with Astro losing his head and half his upper torso in a HeroicSacrifice to protect the evil Count Burg from being killed by the Blue Knight's final desperation attack in his own death-throes. The subsequent "Astro Reborn" arc had several failed attempts to revive him before Dr. Tenma finally resurfaced and pulled it off, but with Astro losing all his memories and briefly doing a FaceHeelTurn.
* ParentalAbandonment: Seeing that Astro was not physically growing, Tenma cruelly tells him he's not his son and sells him to the Robot Circus. But of course, Tenma was mentally unstable to begin with.
* PinocchioSyndrome: Astro constantly questions the humanity he protects to the point of being completely bewildered by their hostile actions to one another.
* PintsizedPowerhouse: Next to Pluto, Astro's quite possibly the most powerful robot on Earth.
* PowerLevels: Astro's power is measured in horsepower, possessing in essence a 100,000 limit.
* TheProfessor: Astro's mentor, Ochanomizu, is an OmnidisciplinaryScientist and the head of the national Ministry of Science. He acts as a source of useful knowledge and inventions throughout the series.
* RageAgainstTheAuthor: In the collected reprints, Tezuka added several introduction comics featuring him discussing various things related to the story and sometimes interacting with the characters. As a result he gets chewed out by Uran for not giving her a proper origin story, Lampe for giving him a deformed skull, and Mr. Mustachio for making the supposedly futuristic world of ''Astro Boy'' so darned mundane.
%% * RecycledInSpace: It's ''Pinocchio'' WITH ROBOTS!
* ReplacementGoldfish:
** Astro Boy himself is a replacement for the son Doctor Tenma lost, who died in a car accident playing with a robotic car that Doctor Tenma gave him to make up for the fact that he was so obsessed with developing a super-robot that he forgot to pay attention to his son.
** The story "Memory Day" features a national holiday in which people are visited by robot duplicates of lost family members.
* ReusedCharacterDesign: As usual for Tezuka, many of the supporting characters are drawn from his "Star System" of recurring character designs. Played with in one story where Astro is approached by a sinister-seeming businessman who turns out to have altruistic motives; for Tezuka fans, the initial distrust is enhanced by the businessman's character design, which Tezuka had previously only used for villains.
* RidiculouslyHumanRobots: Astro and Uran fit this to a T. Other machine characters look less human, even other androids like Astro and his sister aren't that perfect.
* RoboFamily: One of the first examples (if not ''the'' first), Astro has his sister Uran, a couple of brothers (who don't appear in most adaptations for reasons of AdaptationDistillation), and his robot parents, all created after him to remedy his lack of a real family; as well as his other sibling [[spoiler:Atlas]].
%% * RobotBuddy
%% * RobotGirl: Uran.
* RobotKid:
** Astro himself, created in imitation of Dr. Tenma's son.
** Uran and Cobalt, created to be siblings for Astro.
%% * {{Sentai}}
* TheSlowPath: After he's sent to the past in the Scara arc, Astro has to live through the time until his present.
* SuperPoweredRobotMeterMaids: Astro Boy was built to replace a grieving scientist's young son, and is equipped with a 100,000-horsepower engine, rocket feet, and a machine gun that comes out of his butt, among other things. Hand-waved by having Dr. Tenma simply retool an existing "ultimate robot" model to look like his son, or claim that he will not only make his son a robot, but the "best robot ever".
%% * ThoseTwoGuys
* TimeTravel: The Scara arc has the explosion of an alien spaceship send Astro back to 1969. Several other stories contain time travel as well.
%% * TimeyWimeyBall
* TransformingMecha:
** Pook, a robot kid who could turn into a variety of animals before his transformation system was destroyed by trying to change into too many things too fast.
** Odette, a robot ballet dancer who turns into a swan who was created for a fairytale theme park attraction based on ''Swan Lake''.
* TwentyMinutesIntoTheFuture: The original manga was written in the 50s and set in the early 2000s.
* UnbuiltTrope: As explained in the description of the trope page, this manga utterly deconstructed the ReplacementGoldfish trope through the horrible way that Dr. Tenma treated his replacement "son."
* UnderwearOfPower: Astro frequently fights wearing only his briefs and his boots, which may be part of his body.
* {{Utopia}}: Astro's world is a more hopeful vision of the future, with all the cliches seen today: high-rise buildings stretching into the sky, robots everywhere, flying cars, and world peace. In the manga, the only country that wages war is Pekoku (Peacock). Tezuka lived in a time where nuclear war seemed a great possibility and as such the manga was a positive look on the use of atomic power.
* WarringNatures: In one story, there was a cyborg (half human, half robot) that was detested by both the robots and the humans, back when they weren't on so good terms. He resented that, and plotted revenge.
%% * WhatMeasureIsANonHuman: Deconstructed.
* {{Zeerust}}: For one thing, robots in the future still run on vacuum tubes. And atomic power is still considered a viable energy source for a portable generator. Later incarnations rectify this, though.