While historical geographers contributed to colonial projects as surveyors, explorers and map‐makers, since the 1990s they have contributed to the critical analysis of the imaginary and material geographies of empire. However, as the only example of Asian‐led colonialism, the study of Japanese colonialism has not received anywhere near the same degree of scholarly attention as western colonialism, especially in the English‐speaking literature. This study summarizes the historical geographies on both Japanese colonialism and colonial cities in Japanese Empire, arguing the vulnerable status of Japanese colonial cities in postcolonial urbanism, and concludes with a discussion of the particularities of Japanese colonialism. It argues that there is plenty of space for geographical research in the Japanese colonial context. Japan's colonial cities have special characteristics and should receive more attention in post‐colonial urbanism as it in line with the urban scholar's call for ordinary cities in global south. It is hoped that this review can be a complete summary of relevant research and will provide useful references for future geographers to comparatively research Japanese colonialism.