From the PDF:
In RUINS & RONIN, the players take on the roles of bujin (fighting-men, including samurai), spell-casting shugenja, and wise sohei (warrior monks). Will they choose to explore strange ruins in the wilderness? Deep, forgotten dungeons under crumbling pagoda-fortresses built by ancient sorcerers? Perhaps if they achieve great status and power, they might even become daimyos, lords of castles with private armies and fearsome reputations. But the wild places of this world contain strange and fearsome monsters as well as vast riches and magical items. Spirit creatures roam the wilderness by night, and the rocky hills abound with goblins and their kin, always looking to the civilized lands below as a source of plunder and conquest. This is the legend-world of RUINS & RONIN. Samurai up.