Facing the adversity of America’s weakened economy，Europe’s sovereign-debt crisis and “Double Dip” of global economy，Japan’s economy has a strong recovery in 2010.However，Japan still faces stern difficulties such as global concerns about sovereign-debt crisis，yen fierce appreciation and volatile equity market，which have brought Japan’s economy undercurrent and venture.In 2011，there are not only opportunities but also challenges in Japan’s economy，in addition receiving the influence of Northeast Earthquakes，Japan’s economy will continue to return，but the momentum will be reduced noticeably.While China overtook Japan in 2010 to become the world’s second biggest economy，the two countries’s mutual dependence relationship has a great change，which should be treated rationally.The Sino-Japanese bilateral trade has a recoverable growth，and bypassed the level before finical crisis.China is still Japan’s largest trade partner and export target country.Japan’s investment in China appeared a weak increase；on the other hand，China’s investment in Japan has continually got up.In the environment of Japanese economy and the world economy’s warming-up and Chinese economy’s sustained faster growing，especially by the impact of reconstruction after the earthquakes，the Sino-Japanese economic and trade cooperation is expected to achieve stable even faster growth in 2011.