Japan has the most powerful economy in Asia.
china
Japan.
I believe it is Japan
China has the largest if you count by "tonnage", although this does not automatically mean they have the most "powerful" navy. The US Navy is the most powerful in Asia, although it itself is not an Asian country.
Japan
Japan
Japan
Singapore
Egypt became the most powerful state in southwest Asia.
At the moment the most powerful country is America,the 3'rd most powerful country is Russia.
China's.