日本企业对发展中国家的直接投资多是在日本政府开发援助（ODA）完善当地基础设施的基础上，由大型综合商社以及大型企业主导展开的。“一带一路”沿线国家中，东南亚一直是日本最重要的援助和投资地区，西亚国家则是日本最大的原油等能源供给地，南亚正成为日本最重要的基础设施出口地。中日两国在“一带一路”沿线国家的基础设施与产业投资领域的竞争与互补关系并存。
Japanese Foreign Direct Investment（FDI）in developing countries is mainly contributed by general trading company and large enterprises based on ODA，which aims to improve local infrastructure. Among the countries along the “Belt and Road”，Southeast Asia has always been the major focus of aid and investment for Japan，while countries in Western Asia and middle East are Japan’s largest energy suppliers，and South Asia is becoming Japan’s most important export area of infrastructure. The competition and complementary relations between China and Japan coexist in the field of infrastructure and industrial investment in the countries.
