What was the Japanese prime minister and mastermind of Japanese military?

The Japanese prime minister and key figure behind Japan's military strategies during World War II was Hideki Tojo. Serving as prime minister from 1941 to 1944, he played a crucial role in the planning and execution of Japan's military operations, including the attack on Pearl Harbor. Tojo was a prominent military leader and a general in the Imperial Japanese Army, advocating for aggressive expansion and militarism. After Japan's defeat, he was arrested, tried for war crimes, and executed in 1948.