How did america embargo japan?

1. Trade Restrictions: The United States enforced a complete embargo on all trade with Japan, including vital oil supplies. Previously Japan relied heavily on the US for oil, which accounted for 80% of its total oil imports.

2. Freezing of Assets: Japanese assets in the United States were frozen, further restricting Japan's ability to conduct business and purchase crucial resources.

Political and Diplomatic Pressure:

1. Termination of Diplomatic Relations: The United States recalled its ambassador from Japan and closed its embassy in Tokyo. This symbolized a significant deterioration of relations and further diplomatic isolation of Japan

2. Ultimatum and the Cairo Declaration: The US delivered an ultimatum demanding unconditional surrender, known as the Potsdam Declaration. It warned Japan that refusal would result in its "prompt and utter destruction."

3. Cairo Declaration: In December 1941, the United States, the United Kingdom, and China issued the Cairo Declaration, stating their intent to strip Japan of all territories gained through force and violence.

Military Actions and Pressure:

1. Air Raids and Bombings: The US stepped up its air raids and bombings of Japanese cities and military installations, including the devastating firebombing of Tokyo in March 1945.

2. Naval Blockade: The United States Navy imposed a naval blockade, preventing Japan from importing vital resources and further isolating it from trade.

3. Atomic Bombs: The United States dropped atomic bombs on the cities of Hiroshima and Nagasaki in August 1945. The unprecedented destruction caused by these bombs accelerated Japan's decision to surrender.

These measures collectively created immense pressure on Japan's economy and military, leading to its eventual surrender and the end of World War II in the Pacific.