The show runs a comedy con on you: it pretends to teach you about Japanese prefectures while actually just wanting to make you laugh at absurd martial arts named after regional stereotypes. Every episode is a new prefecture, a new fighting style, a new way the joke lands differently because the show genuinely commits to the bit. You're getting a geography lesson, a martial arts parody, and a best-friend buddy comedy all in one package that knows exactly what it is and refuses to apologize for how dumb it gets.
Tokio Abiko, a tough transfer student from Yamagata prefecture, arrives at a school in Tokyo wanting to beat the strongest kid there and win respect for himself and his home region. Instead he meets Japan Hinomoto, a red-haired classmate who is obsessed with the country and will not leave him alone until Tokio says which prefecture he comes from. Japan also turns out to be a master of Todofu-ken, a martial art with 47 styles, one for each prefecture. The result is a goofy action comedy in short episodes that makes a playful tour of Japan. Adapted from a comedy shounen manga by Seiji Hayashi, it aired within the Oha-Suta variety program on TV Tokyo.