The North East Asia, geographically belongs to the sub-system in the East Asia, has once created the "East Asian Community" which consists of China and its surrounding countries, as referred to "Chinese World Empire" in this article. It popularized the Confucius thinking in term of culture, Suzerain-vassal System in politics, and Tribute Trade System in economy. In short, it was a China-center traditional regional integration in East Asia and also a life community with common culture value. Passed downward through the modern history, Japan, under this common culture value, promoted actively the "Asianism" as well as the "Great East Asia Co-prosperity Sphere", which was once popular in the North East Asia but abandoned in WWⅡ. Meanwhile, the existing Chinese "Universalism" and "Chinese World Empire" in the East Asia were suppressed by Western influence to East and were succeeded by Japan afterward. The "Chinese World Empire" was contained by the U.S. in the postwar period and encountered the crisis of the civil war. For the hundred years, it was merely self-protected. Therefore, the theory and practice of traditional eastern "East Asian Community" were all collapsed. After WWⅡ, following by the defeat of Japan, Japanese style "Great East Asia Co-prosperity Sphere" was buried in the ash. The defeated Japan, learned the lesson and protected by the U.S. military, revived its economy and became the economic great power, and a technology great power because of reinvestment in R&D. It commercialized the high-tech and formed a positive circle. Japan rose in 1980s and became the well known "Japan as No. 1". At this moment, Japanese government used the international economic strategy measures, such as foreign aid, investment, technology transfer, and etc. Those measures formulated an economy-center "Flying-Geese Model" and created a Japanese economic power circle sorted by the level of development. In this East Asian Flying Geese system, Japan as a relatively developed country took the lead, four little dragons (Korea, Taiwan, Hong Kong, and Singapore) at the second, and the developing nations in the South East Asia at the last. Economic "East Asian Community" was formed. Japan moved from an economic great power to military, even political one. At that time, Japan took the lead. After the cold war, China, benefited from the reform and political-economical transformation, moved into the era of an overall well-off society. Also because of the rise of China's "comprehensive national power", it gradually formed the setting of two powers struggle for leadership, the China-Japan rivalry. At this moment, coincided with the trend of synchronizing the globalization and regionalization, the world has been occupying with negotiation of Free Trade Area (FTA). It created the trend of the East Asian Free Trade Area (EAFTA). The FTA negotiation spilled from North East Asia to South East Asia. East Asian nations then convened the East Asian Summit to establish the East Asian Community (EAC). The integrating North East and South East also constructed a future two powers struggle for the leadership in the East Asian Community. The power struggle among the world nations, in brief, is the struggle for the "comprehensive national power". It's the linkage and interacted combination of one's politics, economy, diplomacy, national defense, security, resource, technology, education, culture, national will, and consensus. It mainly reflects the competence of the highly production through the high-tech power. The struggle between China and Japan is the one of "comprehensive national power". The result will generate the hegemony. Under the structure of "One Super Power with Multiple Powers", from the perspective of comprehensive national power, compared to the world hegemony, East Asian hegemony merely is a result of powers struggle inside the region. From realism perspective, compared to the U.S. and Japan, China's comprehensive national power is far behind and it is unpractical to confront. The diplomatic strategy of the Hu-Wen regime is to engage the West Europe, to cooperate with the U.S. while difference remains, and to ally Russia for balancing the U.S.-Japan as its framework of World strategy. For its strategy in the North East Asia, it is to ally Korea against Japan, to use Korea issue to pursue its big power diplomacy, and to fight with Japan for the East Asian hegemony. Based on the U.S.-Japan alliance as the diplomacy guideline, Japan accommodates itself to the U.S. East Asian strategy to seek the leadership in the East Asia, furthermore, to accommodate itself to the U.S. world strategy and to gain the influence over the world. From global perspective, the U.S. world strategy remains in the cold war thinking and tactics, in another word, "congagement" policy which adopts containment and engagement simultaneously. The implication for the international setting in the North East Asia is that the U.S. allies with Japan, South Korea and Taiwan to jointly contain China, while guiding China into the international relation network and forcing China to obey the international rule of U.S., both are all dominated by the U.S. However, from the comprehensive national power perspective, if newly rising China wants to break the containment of U.S., Japan, (Korea), and (Taiwan) in the North East Asia, she has to compromise for the self-preservation. By obeying the international rule dominated by the U.S. and developing its own economy at same time, China might seek the chance to engage Korea, Taiwan, and Japan to counter the containment. The way to break is within this process. Furthermore, Japan and Korea compete to each other heretofore. The counter force to restrain Japan's foreign development is Korea. In the North East Asia, Japan used to have the will and power to be the hegemony, consequently, China will be the imaginary enemy. Under this premise, Japan has to accommodate itself to the U.S. to share its interests in foreign policy and to engage the U.S., Korea, and Taiwan to isolate China. However, ever since the modern history, Japan had invaded the East Asian nations and has been the feudal enemy with Korea. This gives China certain space to maneuver. Even the Taiwan-Japan relationship has been closer; it might be less attractive comparing to the Chinese-blood relations and interests of abundant resources and huge market. The "Allying U.S. to restrain China" of Japan could be defeated by the "Alienating Japan to engage China" of Korea. But for the purpose of national survival, the rivalry status between state and state is the last choice. The regional political and economical integration, such as "East Asia Free Trade Area" or "East Asian Community", is not only the temporal phenomenon, rather the vision for co-existence and prosperity among the nations in the future. To lead by "Japan as No. 1" or "Peaceful rising China" in the regional integration towards "East Asian Free Trade Area" or "East Asian Community", it will be defined by the result of duel between China and Japan for hegemony. Whoever winning the leadership in the East Asia would share with U.S. of its world leadership, arrange the international order, break the status quo, and reach the 2050 new era described by Goldman Sachs. The voice for "East Asian Free Trade Area" or "East Asian Community" has already been spoken loudly. The East Asian nations are also on the way to organize the "Community". Those nations are not bounded to the idea of boundary and have to learn to abandon "Exclusive Sovereignty". With gradual concession to the coming "Asian" era and the agreement of peace, equality, consensus, they will push the regional integration in East Asia and build a life community of fellow feeling "State of East Asia". Let the power struggle among nations limit to the leadership of "East Asian Free Trade Area" or "East Asian Community". That is the imminent issue for the intellectuals to work on with all effort.