Ryukami society operates under a rigid feudal system refined over centuries. Eight distinct castes form an interconnected hierarchy where every individual's place is defined by birth, skill, and service. This structure maintains social order and ensures that resources, knowledge, and power flow through predictable channels.

Each caste serves a vital function. The Drakonis rule with authority backed by tradition and force. The Kensai enforce their will through martial skill. The skilled Kaishin, Seiryu, Meijin, and Yamabushi provide the services and knowledge that civilization requires. The Ryoshi connect the archipelago through commerce. And the Yoru provide the labor that sustains everything above them.