== Japan fixed == 

 country's name "Nippon" represents era of 1,400years.(even nowadays) 
 in contrast, "Ashikaga Shogunate" represents 200years. I think Ashikaga Shogunate is better usage for explain it more correctly. 

 so, I type Ashikaga Shogunate instead Nippon(日本). if their is proof more than two people got cefeng during another era of Nippon, I will fix it again.