Answer:
Despite their geographical proximity, Japan and China are very different countries, with unique historic, political and social features. While China is one of the largest communist countries in the world, Japan is a – rather open – parliamentary constitutional monarchy. Although both countries have rather strong economies, wealth is divided in an equal manner in Japan, while major gaps between rich and poor remain in China. Their engagement at the international level is very different, and their allies and foreign economic partners do not always coincide. Furthermore, given the size differences, the two countries need to employ different types of social and political strategies to coordinate all regions and ensure equal growth.
Basically what he said but better. Good luck!