Abstract Characterizations of foreign aid donors neglect the overarching importance of ideas in determining policy. This article explores Japan’s ideological criteria for foreign aid decision-making, differentiated both between goals and the instruments to achieve them, as well as between ideas in the specific foreground and the general background. Japan continues to operate with a recognizable postwar ideology, which synthesized aspects of an earlier militarist and economic nationalism paradigm with liberal internationalism. In recent years, the perception of a growing threat from China and other changes have catalyzed a shift in Japan’s ODA toward greater securitization and liberal value-orientation; however, aid policy still remains situated within this “Rich Nation, Liberal International” paradigm.