Americans don't go to war 1945 will the Japanese surrender?

No way. In that case, I'm afraid it will take more than ten years.

The reason is:

1. Although the US military did not directly participate in the war in China, it gave us a lot of strategic resources and the Flying Tigers. Without the Flying Tigers, there would be no air barrier in the southwest rear area, and the rear area would be in jeopardy.

2. Without the Flying Tigers, there would be no hump route and no assistance. We may have to keep hitting the Japanese with old guns like Jane and Hanyang, not to mention that the new army, the new sixth army and the new fourth army of the Japanese army were all swept by American equipment.

3. In fact, there are not many real Japanese local troops on the battlefield in China. The main forces fighting in China are the Puppet Army and the Kwantung Army (the Kwantung Army is a Japanese army composed of Koreans trained by North Korea, but they all speak Japanese, so they are considered Japanese). Although Japan has nearly two million troops in China, the real Japanese local troops are hundreds of thousands. Most of the others are dedicated to the Pacific battlefield against the United States. Without the United States, these hundreds of thousands of real main forces are Japanese.

4. Because China is poor and weak, and its equipment is poor, all the truly advanced Japanese equipment is placed in the Pacific battlefield. If there were no American troops participating in the war, all these preparations would be brought to China to deal with us.

Japan declared war on the United States, mainly because the United States and Britain imposed an embargo on Japan. Japan's strategic reserves are about to run out, so it ventured out to compete for resources urgently needed in Southeast Asia, such as oil. So without the United States, Japan would have a lot of resources to deal with China.