Which three countries imposed economic restrictions on Japan to step its wars of expansion ?

The three countries that imposed economic restrictions on Japan as a response to its wars of expansion and aggression in the 1930s were:

1. United States: The United States imposed economic sanctions on Japan, including the restriction of essential resources such as oil, steel and scrap metal in response to Japan's invasion of China and its expansionist policies in East Asia.
2. United Kingdom: Britain also implemented economic restrictions on Japan, particularly regarding the supply of crucial resources needed for Japan's military and industrial activities. This was a response to Japan's aggression in China and concerns over its expansionist ambitions.
3. Netherlands: The Netherlands, as a colonial power in Southeast Asia with territories neighboring Japan's expansionist targets, also imposed economic sanctions on Japan. These measures were aimed at curbing Japan's access to resources and impacting its ability to fuel its military campaigns.

These economic restrictions, particularly the embargo on vital resources like oil, significantly affected Japan's ability to sustain its military operations, eventually contributing to heightened tensions and the escalation of conflicts that led to the outbreak of World War II in the Pacific.