Emperor
The Emperor dominated other rival clans. The emperors and thoes that follow him claimed they were descended from Gods.
shogun
Powerful military commander of all Japan after the Shogun seized power in medieval Japan, the emperor became largely a figurehead.
daimyo
Powerful war lord who controlled a region of Japan, serving the Shogun.
saimurai
Warrior sworn to serve and fight for his lord (daimyo) and who followed a strict code of conduct called Bushido.
Merchants
Merchants sell and buy thing moving their way slowly up the system.
eta
They would do any jobs that nobody else wants to do if money was involved.