12 episodes
First episode: E1

Japan, 2019, just before the dawn of a new era. Suddenly, a rift to another dimension appears in the sky, revealing an alternative world "Shinkoku Nippon," with the sky and the earth upside down. This parallel world keeps the former militarism, with its era being Eternal Showa. The military invades the real Japan with giant humanoid robots called "GARANN" and their gas weapons "GENMU", rendering our modern weapons ineffective. "Shinkoku Nippon" instantly seizes the government and achieves de facto conquest of Japan. The new era, "Reiwa," has not arrived for Japan.
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12 episodes
First episode: E1Quick answers about this series, release status, and episode totals.
Rumble Garanndoll first aired on October 11, 2021.
Rumble Garanndoll currently has 1 season and 12 episodes.
Rumble Garanndoll is ended, and no upcoming episode is currently scheduled.