Following the Great East Japan Earthquake, a total of 163 countries and regions, 43 organizations and more than 670 NGOs announced that they would provide Japan with support. This can be viewed as an expression of approval and gratitude for Japan’s long years of official development assistance (ODA) and other forms of international cooperation. However, Japan’s ODA budget, which maintained the rank of world No. 1 for eight years from 1993, has dropped to fifth place at present. ODA is without doubt a powerful force for Japanese diplomacy and therefore should be increased.