If you're looking for anime similar to Hi no Tori 2772: Ai no CosmoZone, you might like these titles. All recommendations are made by Anime-Planet users like you!
Five hundred years ago, mankind abandoned Earth after the devastation it caused on her soil. For efficiency, and to make sure not to repeat the same mistakes, men are now grown in test tubes and have their minds reprogrammed at the tender age of fourteen, so that they may better function in society. The central computer known as Universal Control manages the system, destroying those that deviate. And amongst these humans is Jomy Marcus Shin, a young man who is about to be dubbed a traitor once they discover he is a Mu, a monster with telepathic powers that will disrupt their way of life...
If futuristic sci fi movies are your thing, Toward the Terra and Hi no Tori 2772 aim to please. I enjoyed HnT quite a bit more, but both have a very similar feel and style that you'll appreciate.
Old School sci-fi here. Toward the Terra is full of an ancient aura typical of all the anime of that time; it's the best companion for Hi No Tori 2772.
Metropolis is a grand high-tech city-state populated by humans and robots alike. It is in these streets that Detective Shunsaku Ban and his sidekick Kenichi search for the rebel scientist Dr. Laughton who unbenounced to them, is developing a super android named Tima as a tool for the Duke of Metropolis. What starts out as a normal case turns into mayhem as the scientist is murdered, and the true plans of the Duke are finally revealed...
I know what you are thinking... you think I recommended this because both were done by Tezuka, right? Wrong! While the artwork admittedly is the same, the sci fi feel (with the concept of robots being close to human) is VERY VERY similar, and I just know you'd like one if you liked the other.
Leaving the earth after marriage, a woman is left behind in space when her husband suddenly dies of a cosmic disease. Her friends on the Earth head for space to save the woman who was once everyone's ideal lady.
Both are 80's anime that are based on the works of Osamu Tezuka. While they have different plots, they are both sci-fi and they both have a similar vibe. I think Hi no Tori 2772 is the better of the two, but if you like one you will probably like the other.