Megazone 23 is a Japanese animated mecha cyberpunk film series created by Noboru Ishiguro, written by Hiroyuki Hoshiyama and Emu Arii, and directed by Ishiguro, Ichiro Itano, Kenichi Yatagai, and Shinji Aramaki. The three-part original video animation (OVA) series debuted in 1985. It was originally titled Omega Zone 23 but the title was changed just before release.