In contemporary society, contact with the media always happens repeatedly. This study examines how the media build nationalism in Japanese society, with a focus on Japanese media events. The process of producing national discourses in the media is carried out in various ways, as exhibited by post-war Japanese society. Media events can be said to be a new narrative genre that conveys a fundamental story about what is happening at a certain point in time. In Japanese society, by using the concept of media events, the representation of "Japan" is conveyed to the audience, and through this, nationalism is fostered. In this study, while reviewing discussions on these media events in Japanese society, I examined the kinds of national discourses these media events produce. This process revealed how the power of the media works in Japanese society, and how the media performs a powerful ideological function.