Database: Daimyo Clans

Between the 16th and 19th centuries, the function of feudal clans depended on a clan leader increasing control over his peers and vassals. The daimyō were structured into several groups, the ichimon, the fudai, the tozama, and minor direct vassals. Generally, the ichimon were members of the lord's family who, according to the principle of indivisible succession, no longer benefited from a share of the domain. They could only occupy the upper echelons among the lord's vassals, and the latter compensated them in rice or currency. The fudai were usually the most stable group. They were mostly loyal warrior companions of the lord or their descendants. Additionally, the fudai could include warriors whose domain was close to the daimyō; but, they had chosen to ally with him instead of fighting for territory. The tozama were 'foreign lords.' Their domain was absorbed into the daimyōs' as he extended his domination through war and annexation. As a result, they were most often defeated enemies who became allies through force of circumstance. Essentially, they preferred to capitulate and accept their new condition rather than be annihilated. The lord placed them in the position of vassal, but kept them under surveillance.

As for minor direct vassals, they formed the lord's personal guard, officer corps of his army, and owned land directly on his domain. Women were officially absent; however, they had a voice when they had the lord's ear. Their advice or preferences could weigh heavily in final decisions.