Kasei-Theory I.Unreadability: Non-Maintained Differentiation

This paper presents the first system of Kasei-Theory as a non-modal readability maintainability architecture. The paper does not propose a theory of ignorance, an epistemology of limitation, or a metaphysics of hidden structures. Instead, it fixes unreadability, non-maintained differentiation, residual differentiation, weak unreadability, configurational periphery, structural resonance, retention limitation, and local maintainability as distributed structural positions within constrained local readability maintainability. Unreadability does not establish absence. Unreadability does not establish hidden readability. Unreadability does not establish recoverability. Differentiation does not require maintained readability. Unreadability does not negate differentiation. Retention failure does not terminate differentiation. Retention and unreadability remain locally co-constrained without transition into external absence. Unreadability does not establish externality, concealment, or transcendental unreadability. The first system remains non-total and non-final without epistemic grounding, concealed structure, or final philosophical closure. No subject is presupposed. No concealed readability is secured. This paper is part of Kasei-Theory.