The countries that were on the Axis Powers' side during World War 2 were:
1. Japan
2. Italy
3. Germany
These countries formed the Axis Powers alliance, which opposed the Allied Powers during World War 2. The Axis Powers aimed to expand their territories and influence through military conquest and aggression. It's important to note that the United States, USSR, and France were part of the Allied Powers, who fought against the Axis Powers during the war.