This thesis adopts national strategy as its research approach and analyzes the impact of the United Forces Forces, Japan (USFJ) upon Japan. The purpose is to respond to three questions. First, how national strategic thought has developed and how it is applied to Japan. Second, when USFJ began to be stationed in Japan and how their presence has affected Japan. Third, for the last ten years, especially through the change of the ruling party, how Japan has regarded USFJ under the Japan US security arrangements.
When discussing national strategy, we need to focus on four factors: national interest, national objective, national policy and national strategy. If these factors are applied to Japan, each factor respectively refers to: maintain the current Japan US security arrangements, aim for equal relations between Japan and US, assist USFJ and finally, put more emphasis on economic development than on armament. The national strategic perspective of this thesis is divided into the viewpoints of military strategy and political strategy.
After the Second World War, according to the Japan US Security Treaty, those foreign forces stationed in Japan changed from the occupation army to USFJ. At first, Japan''s national strategy was based on Yoshida Doctrine, but later Japan made adjustments by revising the treaty, etc. The impact of USFJ on Japan can be seen from the amount of Host Nation Support and compensation measures for the affected local residents. As these related costs come from the defense budget, this issue belongs to military strategy. Political strategy takes the lead in constructing national strategy. Above all, Prime Minister of Japan plays an important role. Obviously, since the Koizumi administration, Japan has added ‘expand its area of responsibility’ as a new national policy. Change of the ruling party in 2009 not only proved Japan''s national interest and objective should remain the same but also made me realize Japan is moving toward a normal state and gradually adjusting its national strategy.