求翻译：第四，奥巴马上台以来的日美同盟关系。该部分从三个部分进行论述，一是奥巴马政府上台以后在亚太地区实施“全面接触”政策，日本担心自身的战略地位下降。是什么意思？

Fourth, since Obama took office, the Japan-US alliance. That part of the three parts are discussed first, the Obama administration came to power after the implementation of "comprehensive engagement" policy in the Asia-Pacific region, Japan is concerned that its strategic position decreased.

The first 4, the Obama inauguration on the Alliance. From Part 3 of this essay, part A is the Obama administration took office in the Asia Pacific Region comprehensive implementation of the "touch" policy, Japan is concerned about its own strategic position.

正在翻译，请等待...

IV, since Obama took office of the Japan-us Alliance. The part from a three part discussion, is the Obama administration came to power in the Asia-Pacific region in the future implementation of "comprehensive engagement" policy, Japan worried about its own strategic position declined.

Since fourth, the Austria Pama has come on stage the Japanese and American union to relate.This part carries on the elaboration from three parts, one will be Austria Pama Government comes on stage later in the Asian and Pacific area implementation “the comprehensive contact” the policy, Japan worrie