From the view of international strategy and national security strategy, the geography factors act as the certain geography strategy relations. 从国际战略和国家安全战略的角度观察，地缘因素表现为一定的地缘战略关系。
The US has based troops in Japan since the end of WWII.The Deployment of aircraft carriers in Japan is a major part of US's strategy on the security in the Asia-Pacific region. 美国自第二次世界大战结束以来一直在日本驻扎军队，而且在日本长期部署航空母舰是美国太平洋地区安全战略的重要部分。
