What secrets did the Japanese army hide from the emperor in World War II?

The latest historical data show that the Japanese military has concealed at least two secrets of World War II: the Soviet Union will declare war and the United States will drop an atomic bomb.

The Japanese military learned in May 1945 that the Soviet Union was about to declare war on Japan. This information was learned by the military attaché s of Japanese embassies in Europe at that time and reported to Japan. Now the monitoring records are still kept in the Royal Archives.

The Soviet Union formally declared war on Japan to Britain and the United States at the Yalta Conference in February 1945. At this secret meeting, the United States, Britain and the Soviet Union had a fierce bargain on the post-war world pattern, including the decision to maintain Mongolia's independence. In order to prevent the allies from wavering, these contents are strictly forbidden to be leaked.

But there is no airtight wall in the world. In May of the same year, the contents of the Yalta Conference gradually spread in the diplomatic circles of European countries. It was at this time that the Japanese military attache in Europe also obtained this information from various channels. At that time, Germany had failed, Italy had joined the allied camp, and Japan was fighting against all the powerful countries except the Soviet Union. If Japan can end the war at this time, it can not only prevent the Soviet Union from participating in the war, but also preserve its influence in East Asia, and the American atomic bombs will not be dropped on Hiroshima and Nagasaki.