This course analyzes the high-growth period in the 1960s, the bubble period in the late 1980s and the "lost decades" in the 1990s through 2000s of the Japanese economy from the viewpoint of the Japanese financial system. In particular, the course focuses on how the Japanese financial system has evolved in the postwar period and how it has affected the performance of the Japanese economy by way of changing the behavior of banks, firms and households. Special attention is paid to the "lost decades" and describing the characteristics of the "lost decades" and then explaining why it took so long to wipe out the aftermath of the "lost decades." The efficacy of Abenomics is examined, as well as economic policies advocated by the current Prime Minister Shinzo Abe, in rescuing the Japanese economy from "lost decades."