Megazone 23

Megazone 23 (メガゾーン23, Megazōn Tsū Surī) is a four-part original video animation created by AIC, written by Hiroyuki Hoshiyama, and directed by Noboru Ishiguro, Ichiro Itano, Kenichi Yatagai and Shinji Aramaki. The series debuted in 1985. It was originally titled Omega Zone 23 (オメガゾーン23, Omega Zōn Tsū Surī) but the title was changed just before release.

Plot
Megazone 23's story is set in the far future of the human race, after, in the early 24th century, various environmental issues rendered Earth uninhabitable, forcing humanity to leave in several massive colony ships, the titular Megazones. The story itself follows the population of Megazone Two Three, based on an unnamed part of Japan.