Touken Ranbu is a popular Japanese online game and anime series that combines historical elements with fantasy. Players and viewers are introduced to anthropomorphized versions of famous Japanese swords known as 'Touken Danshi.' These characters are tasked with protecting history from being changed by malevolent forces. The series has gained a significant following due to its unique concept, engaging character designs, and captivating storytelling, resulting in numerous adaptations, including anime, stage plays, and films.