Ashigaru

Ashigaru (足軽, lit. lightfeet?) were foot-soldiers who were employed by the samurai class of feudal Japan. The first known reference to ashigaru was in the 1300s, but it was during the Ashikaga Shogunate-Muromachi period that the use of ashigaru became prevalent by various warring factions.

Read more about Ashigaru:  Origins, Weapons and Armour, Service in War, New Weapons and New Tactics, Discontinuation of Conscription