In the distant year 2003, Japan is a technological utopia, and robots are everywhere. One such robot, Tobio, was built by the brilliant Dr. Tenma to replace his dead son. But when it soon becomes apparent that Tobio is an imperfect copy of his departed child, Dr. Tenma throws him out. He is rescued from the scrap heap by the benevolent Professor Ochanomizu, a crusader for robot civil rights. Now the little robot, renamed Astro Boy, is given a mission to defend Japan and the world from all manner of sinister threats. Using his seven super-abilities and 100,000 horsepower worth of strength to battle evil, Astro hopes to set an example to the world of the good which all robots are capable of. 

Atom is a robotic boy that posses super human powers and an artificial intelligence system that is unparalleled to any robot. His creator, Dr. Tenma, created him to replace his late son, Tobio. Dr. Tenma soon destroys his laboratory, after the creation of Atom, and shuts down Atom. Soon after, Dr. Ochanomizu, the head of the Ministry of Science revives Atom, and tries to give him a normal life as a 6th grade student that helps the police agency keep renegade robots and bigot humans from causing harm. Atom faces extreme racism for being a robot, and he must discover the truth about his creator Dr. Tenma.
 
(Source: Anime News Network)

Creating a robotic boy in the image of his recently deceased son Tobio, Professor Tenma thought nothing could go wrong now that his beloved child had been "reborn"... that is, until he comes to realize that this invention could never replace his son. Before long, however, the robot is kidnapped and spirited away to a robot circus in America, where he is soon rescued by Dr. Ochanomizu, and taken into his care. Tobio is given the new name Tetsuwan Atom, and transforms into Japan's crime-fighting hero, although his anti-violent pacifist views and overall childlike naivety tend to clash with his battles often. 
(Source: Anime News Network)

Doctor Tenma, chief of the Ministry of Science, brought a digital brain genome from an aircraft. Doctor Tenma begins a trip to Mars, then combines the genome with a robot. Doctor Tenma's son, Tobio, who had died in a traffic accident, has been revived. 
(Source: AstroBoy Online)

Astro Boy, helping Professor Ochinomizu with planetary exploration, discovers a trash star floating in space. On this star, robots that can no longer move have been thrown away stacked on top of each other. On this robot mountain, Astro saves a robot soldier, Bemu, that escaped from the verge of death and takes him back to Earth. 
"I'm tried of fighting!" "I feel the same." While Atom and Bemu are together, a warm friendship is born and goes on to deepen. However, one day, the trash star draws near to the Earth. If it hits, the Earth would have a huge explosion. The Earth is in chaos. As this happens, there is just one way to stop the crash into Earth. Only this is... What will Astro do. Will he be able to protect a peaceful Earth as well as his friendship with Bemu? 
(Source: Astro Boy Wiki)

Another Tetsuwan Atom Movie that was shown in the Tezuka Osamu World Cinema in Tokyo until it was closed in 2011. 
(Source: AniDB)

With no investor funding, Umatarou Tenma and Hiroshi Ochanomizu must turn to odd jobs to fund their project: to build a humanoid robot that thinks and feels like a human being. When the two geniuses succeed in building A106, they start experimenting with his emotional capabilities right away. As they test to see if they truly can build a sentient robot, one question remains: will this robot become a god or a friend? 
 
(Source: Sentai Filmworks)

From the TV series of "Astro Boy," three episodes were selected for theater re-edition, "Robot Rocket" (46th episode), "Earth Defense Troops" (56th episode) and "The Last Day of Earth" (71st episode). Of these three, "Earth Defense Troops" was the only one originally derived from Tezuka Osamu's story "Number 7." Its settings were diverted to the "Astro Boy" series. In this film, the whole scene of "Earth Defense Troops" and a part of "The Last Day of Earth" were reproduced in color for this theater version. 
(Source: Official site)

A special episode of Takehiko Maeda's world rivals where Atom and Hoshi compete in a baseball match. 
 
Notable for being one of the oldest anime crossover works in Japan.

Yawaraka Atom, a parody of Astro Boy (Atom) as a squishy tank, went to stop catastrophe and evil.

A murder occurs in an orderly world where robots are unable to kill humans. The robotic Europol investigator Gesicht takes the case, but the mystery deepens when he finds no trace of a human at the scene of the crime. As he pursues the truth, Gesicht uncovers the most evil manifestation of hate that history has ever seen, one that is bent on bringing destruction to the world ... 
 
(Source: Netflix)

In the short, Astro Boy gives his life to save a densely populated space colony from a collision with the sun. The doctor Black Jack saves him, reborn to a new identity as Neo Astro Boy. 
(Source: Anime News Network)

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