Daimyo: A feudal lord in ancient Japan. In the sixteenth century, the power of the daimyos was unchecked.
Koku: A measure of rice (and wealth). One koku was the amount of rice required to support one person for one year. All fiefs are measured in koku.
Mon: The graphic symbol of a Daimyos house.
Ronin: An independent samurai.
Kurasawa's "Seven Samurai" were all ronin.
Shashimono: A battle flag, identifying the wearer's house, attached to thee back of a samurai's armor.
Shogun: The highest military rank in the Japanese feudal hierarchy.