The Muromachi period was only three decades in, but things weren't looking good. Beef between rivals claimants to the imperial throne and regional daimyo was causing a grim outlook... until Ashikaga Yoshimitsu became shogun and started sorting out their problems!
The seal was essentially the Ming 
recognizing Yoshimitsu as Japan's ruler.
El sello de Ming reconocía
a Yoshimitsu como gobernante de Japón.
O selo era basicamente Ming reconhecendo
Yoshimitsu como governante do Japão.