This article examines the genetic similarities and differences between Chinese and Japanese people, exploring the history of their genetics as well as current research on both populations. It is found that there are numerous similarities between them in terms of East Asian genes, shared haplogroups, physical characteristics, and diseases. However, there are also some distinct differences between them which suggest separate evolutionary paths taken by each population group over time. Additionally, these genetic similarities can have an impact on how members from each population interact with one another today.