Since its formation as a girl group in 2005, AKB48 has become a phenomenal success and institution in Japan. Having originally recruited fans with photocopied fliers and daily performances in the Akihabara area of Tokyo, AKB48 now saturates Japan. Its members--nearly 800 of them, including five sister groups and four so-called "e;rival groups"e; across Japan, as well as six sister groups in other Asian cities--appear in print, broadcast, online, and social media; in advertisements and on products; at home and on the train; on- and off-screen.AKB48's multi-platform omnipresence is characteristic of "e;idols,"e; whose intimate relationship to fans and appeals to them for support have made the group dominant on the Oricon Yearly Singles Chart in the 2010s; they hold several records, including most consecutive million-selling singles sold in Japan. A unique business model relentlessly monetizes fans' affections through meet-and-greet events and elections, which maximize CD sales, and their saturated presence in the media. At a time when affect is more important than ever in economic, political, and social theory, this book explores the intersection of idols and affect in contemporary Japan and beyond.