They also stopped giving Japan airplanes and airplane parts. Japan needs oil the most out of all the supplies that they needed the most because they were taking over many countries so they needed it as mostly fuel. (Doc C) So Japan was desperate for the oil because 80% of it came from America.(Doc D) They also needed oil to transport between Japan, Manchuria, China, and Indochina. So of course Japan wanted revenge because America stop selling their best supplies to Japan so they bombed Pearl Harbor. (Doc D)
The last reason why Japan bombed Pearl Harbor was because the U.S fleet expansion threatened Japan by its overwhelming numbers and strength it was gaining. The U.S Congress passed an act called the Naval Expansion Act and it promises to triple the fleet. (Doc C) A Japanese Prime Minister and War Minister named Hideki Tojo said that Japan knew that the U.S Navy would definitely grow stronger. (Doc E) So since Japan felt threatened by America’s growing Naval Fleet, they felt that it would be best to weakened it by bombing at the source, Pearl