What is happening in Japan in 1453CE
The Kamakura shogunate brought a large measure of stability to the country and succeeded, with the help of a typhoon, in repelling the Mongol invasions of 1274 and 1281. It has been replaced since 1336 by the Ashikaga shogunate, which differs from its predecessor in being more closely associated with the emperor and the imperial capital.
The power of the Ashikaga shoguns is being weakened by regional revolts, and the provincial governors (daimyo) are slipping out of Ashikaga control.
This is a period in which contacts with the outside world develop, with China and Korea especially. Japanese merchants –and pirates – operate along the coast, as far afield as Siam (Thailand).