Yoritomo Keito was a samurai of the Mantis Clan who moved to Water Hammer City in the Dragon lands. There he found his old rival, Yoritomo Waruma, as both had succeeded to get the other sent to Water Hammer, what they expected to be a meaningless backwater. They set up shops on opposite sides of the Merchant District of the new city. The settlement grew in importance, and the rivals sold the finest metal for the many smiths which went to the Water's Strength Temple. Three decades later, the two men sponsored multiple shops.