The topic of Polish diaspora in Japan, a community with which Poles in Japan identify as Poles, recognize Polish heritage and connection to what it means to be Polish is one of important, but practically unresearched issues in Poland-Japan relations. From the 1970s a growth in Polish population in Japan can be observed. They began to organize meetings, establish formal and less official groups and have helped and maintained connections to Poland. This paper will focus on the post-war history of Polish diaspora in Japanese islands.