People in Japan have not appreciated the co-marketing of Greta Gerwig’s Barbie and Christopher Nolan’s Oppenheimer, dubbed Barbenheimer, as much as the rest of the world. For Japan, the only country in the world to have ever experienced atomic bombings, the development of nuclear weapons is no laughing matter. After witnessing repeated lighthearted interactions between the Warner Bros.-linked Barbie movie social media account and memes referencing atomic bomb explosions in a nod to the Barbenheimer trend, the producer’s Japanese arm called out the US counterpart for indulging in the pitting and posturing the two spectacles side-by-side.