Final answer:
The Japanese empire was dissolved by the Allied powers after the atomic bombings of Hiroshima and Nagasaki and the Soviet invasion of Manchukuo, culminating in Japan's formal surrender aboard the USS Missouri.
Step-by-step explanation:
At war's end, the Japanese forever renounced war, and their entire empire was dissolved by the Allied powers following their unconditional surrender. This was after both the atomic bombings of Hiroshima and Nagasaki by the United States and the subsequent Soviet invasion of Manchukuo. Finally, on September 2, 1945, Japan formally surrendered aboard the USS Missouri in Tokyo Bay, an event overseen by General Douglas MacArthur, marking the end of World War II and the beginning of Japan's commitment to peace and demilitarization.
Hence, the Japanese empire was dissolved by the Allied powers after the atomic bombings of Hiroshima and Nagasaki and the Soviet invasion of Manchukuo, culminating in Japan's formal surrender aboard the USS Missouri.