You Don't Know Gunma Yet (お前はまだグンマを知らない) is a Japanese manga series written and illustrated by Hiroto Ida. It was serialized online via Shinchosha's Kurage Bunch website form October 2013 to May 2019 and was collected into eleven volumes. A 4-episode live-action television series adaptation aired between March 6 and 27, 2017, and a live-action film adaptation was released in July 2017, both starring Shotaro Mamiya.[1] An anime television series adaptation produced by Asahi Production aired from April to June 2018. A new "light anime" television series adaptation produced by Imagica Infos and Imageworks Studio, titled You Don't Know Gunma Yet: Reiwa Version (お前はまだグンマを知らない～令和版～), aired from January to March 2026.
Plot
Nori Kamitsuki, a high school student who transfers from Chiba Prefecture to a school in Gunma Prefecture after his family relocates. Nori initially looks down on Gunma, viewing it as rural and unsophisticated. However, he is immediately confronted by the region's fiercely proud students, who treat Gunma not as a prefecture but as a sovereign and powerful territory with its own unspoken rules.
Nori becomes embroiled in escalating conflicts with classmates who embody Gunma's extreme local patriotism, including encounters that parody territorial warfare, secret police, and survival trials. As he struggles to adapt, Nori learns the customs, rivalries, and exaggerated dangers associated with life in Gunma, gradually shedding his prejudices.