In the early twentieth century, American policy toward Japan underwent from"support Japan and restrain Russia"to"Confrontation between America and Japan", in order to ensure China s door open by way of balance of power strategy, and by means of economical superiority to consolidate and increase American supremacy in the far-east and the Pacific ocean region.

The interference of the United states in the dispute will undoubtedly add difficulties to the solution of the dispute, worsen the security environment aroud our nation and break the balance of power of the Asia-Pacific region.

Deducing manoeuver system composed of hardware and software of computer is the organic whole used to deduce war situation.

The Nectrality Treaty signing between Russia and Japan during World War Ⅱ is a significant event, which played important roles between the two countries in a period of war time to avoid two-route fighting.