The geography of Japan was an archipelgo. This is a chain of many islands. It hurt the people by only 11% could be farmed, mountains were volcanic in orgin, and prone to earthquakes. It helped by the soil was very fertile.
We should gather warriors for protection.
China and Japan where very different, and China kept trying to invade Japan and take over.
Hmm... What type of goverment should we have.
Political power fell to the Fujiwara clan. Imperial government was highly developed
During the Heian period in Japan the aristocrats in the area brought samuri to protect them. The samuri lived by Bushido or "The Code of the Warrior."
I ,a samuri, can protect you and the other aristocrats.
The government of the Kamakura shogunate had an emperor however the power was held by the genrals. The emperor was only emperor by name.
I believe the most influential person of the Japanese society in what we've looked at would be Minimoto Yaritomo who set up a system of government that essentially gives power to the samuri.