Rumble Garanndoll (TV Series)

TV Series (2021). 12 Episodes. The story is set in 2019, just before the change in historical eras for Japan. A rift to another dimension suddenly opened in the skies above, revealing a "turnabout" alternate world called "Shinkoku Nippon." This parallel version of Japan maintained its militarism and remains stuck in the Showa era. Shinkoku Nippon invaded our Japan with its "Genmu" gas weapons (to which our own modern weapons have no effect) and giant humanoid "Garan" weapons. The invaders immediately took over our government and all but conquered Japan. As a result, our Japan never ushered in the Reiwa era. A decade later, our Japan was revamped as Genkoku Nippon, a puppet state of Shinkoku Nippon. Under harsh censorship, the once thriving manga, anime, idol, and other sub-cultures have completely died off ... or so it seemed. (Source: ANN)