Here you can see the Samurai. The Samurai was a powerful military caste in feudal Japan. Samurai, along with many other Japanese, practiced the Shinto religion. A religion of nature gods and power within animate and inanimate objects. More importantly the Samurai lived by a code of conduct called the Bushido. The other religion that was active around this time was Zen Buddhism: A school of Mahayana Buddhism that values meditation and intuition.
As you can see there on the right, that is a descendant of Prince Junda who died in 513 AD in Japan. These descendants were known as members of the Yamato Clan. The Yamatos were an immigrant tribe of scribes in Japan during the Kofun Period. The Yamato clan ruled as Emperor yet had very little power overall due to the increased power of the daimyo(powerful families) shogun(warlords) and the samurai.
China's influence on Japanese culture also starts to erode after Japan becomes more independent.
In 1274 and 1281, the Mongols attempted to invade Japan but were unsuccessful at conquer the daimyo, samurai, and even the weather around the islands. Around this time period is also when the term Kamikaze comes into play, which is when an attacker basically sacrifices himself to harm or damage their opponent.