In the years 1945-1989, Polish-Japanese relations were characterized by gradual development. After the end of World War II, Poland came under the influence of the Soviet Union, and Japan, after capitulation, was subject to American occupation. In the first post-war years, relations between Poland and Japan were limited, mainly due to the different political context. However, as international tensions eased, relations began to develop, especially in the field of trade. In 1957, Poland and Japan established official diplomatic relations, which opened up new opportunities for cooperation. In the 1960s and 1970s, there was an increase in trade and the development of cultural and scientific contacts. Nevertheless, Poland and Japan maintained relatively limited relations, due to differences in foreign policy and strategic alliances.