The popularity of Japanese manga, or comics, has surged globally, largely due to their distinct storytelling, art style, and cultural significance. One popular genre of manga is martial arts, which spotlights the art of combat and various fighting styles. Numerous manga series have been created based on different martial arts, such as Karate, Judo, Kendo, Sumo, Kung Fu, Boxing and MMA. However, manga with Aikido as their primary storyline is rare. Evil Heart is one of the few popular Aikido manga series. It is a drama telling the story of Masaki Umeo, a high schooler with a bad temper who encounters an English teacher from Canada, who is also an…