Gate Keepers
Japanese media franchise
Gate Keepers (ゲートキーパーズ, Gēto Kīpāzu) is a tactical role-playing game developed by Entertainment Software Publishing and published by Kadokawa Shoten for the PlayStation. The game was then adapted into a manga series written by Hiroshi Yamaguchi and drawn by Keiji Gotoh and an anime series produced by Gonzo, and first aired on April 3, 2000. A six episode original video animation (OVA) sequel, Gate Keepers 21, was released in 2002. The main characters in the OVA sequel were the next generation of Gate Keepers.
All Gate Keepers series follow the same basic premise and share most of their characters, with some major discrepancies (mainly involving the character Reiji Kageyama). A character from the game, Francine Allumage is completely absent from the anime. Another character from the game Misao Sakamori, was replaced in the anime with the new original character Megumi Kurogane (though Misao does make a guest appearance towards the end of the anime).
Plot
The story is set in 1969, a period of time in which Japan is experiencing intense economic and social development after the end of World War II in 1945. Unbeknownst to humans, alien/interdimensional beings have emerged with plans to take over the world by sending numerous agents to wreak havoc in cities, turning people into robotic minions. They are referred to as "Invaders" (インベーダー, Inbēdā).
The public source identifies “Gate Keepers” as japanese media franchise. This brief keeps that definition visible, then builds a research path around Gate, Keepers and Japanese.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 6, 2026. The linked authority identifier is Q2539030. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2000, 2002, 1969 and 1945.
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This entry incorporates text from “Gate Keepers” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.