This study demonstrates the development of Japan’s trade policy in the AsiaPacific region in the process of regional architecture at a global level, including multilateralization of the Mega-FTA, blockage of economic integration, regional order establishment, and more. The focus of this discussion based on the approach to multifaceted two-level linkage theory, the describing the convergence of regional trade policy, global system, regional system and domestic political processes, surrounded by the principle regional regime in the Asia-Pacific region, between CPTPP and RCEP, matching to the political implications. Japan’s trade policy changes the pressure on hegemonic countries in their desired form by modifying the global trade order, focusing their linkage policy on expanding the win-set of the trade order reorganization in the Asia-Pacific region. In particular, Japan’s trade policy in the Asia-Pacific region has been affected by the globalregional-domestic functional relationship, including the US trade protectionism expansion, cooperation and checks between China-Japanese relationship as a regional architecture competitor, interest of government leadership and the interest groups, and more. Such policy performs an adjustment to reduce mutual losses and create common benefits through cooperation, through the policy convergence process of international relations and domestic politics, surrounded by CPTPP and RCEP. It is implies that Japan pays attention to develop the strategic value and cooperative rationality of the converging policies by balancing the point of compensation through an optimal decision, rather than prioritizing their economic interest in the process of forming a new regional architecture.
In other words, Japan’s trade policy is being expressed in political implications such as the sustainable growth of the global economy, the inclusion of enhancing the equity among the countries in the region, emphasis on the possible linkage of regional architecture convergence, flexible response to strengthen the competitiveness of domestic industries, and more.