In this paper, we discuss how development assistance has been and should be designed in achieving development goals from views of Japan and East Asia. In pursuing successful ODA under the ODA governance structure, there are three necessary conditions: first, the aid allocation should be consistent with the global poverty targeting framework; second, ODA as a mode of capital inflows should be the one facilitating the recipients' efforts and growth directly and indirectly; and third, aid governance should be designed to minimize transaction costs arising from aid proliferation. In achieving these three conditions, experiences of Japan and East Asia in providing ODA in an apolitical way to align international agendas, in utilizing loans to develop infrastructure, and in achieving borrowed technology-driven industrialization with rapid human capital accumulation, will provide important insights into setting future global development policies. Also, the "ODA Trinity", i.e., complementarities between ODA, FDI, and economic growth, are the key in the next generation's ODA policies. Finally, ODA can play an important role in facilitating regional cooperation in disaster management, because it is imperative to develop formal mechanisms across countries to diversify aggregate disaster risks.