Although the Yasuki family as a whole is known for its mercantile and political role, many individual Yasuki serve in the Crab armies, with such members of the family often gravitating toward logistical and organization duties. As a result of this role, Yasuki bushi often found themselves in charge of organizing, training, and leading the Crab army's limited ashigaru forces. Eventually, this led to the establishment of a specific organization dedicated to that role: the Taskmasters. The dojo of the Taskmasters, located in Sunda Mizu Mura, admits students from any family but still tends to attract a disproportionate number of Yasuki, and the sensei is usually a Yasuki as well.
It may be noted that while the Taskmasters were originally oriented towards the command of ashigaru, over time their training and role expanded into a more general aspect of supervising lower-ranking soldiers. During the Clan Wars, when the Crab Clan forms a misguided alliance with the Shadowlands, some Taskmasters also find themselves saddled with the unpleasant duty of commanding units of goblin troops.