Kasei-Theory I.Irreversibility: Irreversibility Without Temporal Sequence

This paper presents irreversibility within the first system of Kasei-Theory as a non-modal readability maintainability architecture. The paper does not propose a metaphysics of time, a theory of entropy, a model of causal succession, a theory of historical progression, or a structure of temporal sequence. Instead, it fixes irreversibility, maintainability asymmetry, configurational differentiation, unreadability, drift, and constrained restoration limits as distributed structural positions within constrained local readability maintainability. Irreversibility is not treated as a temporal or physical explanatory principle, but as a constrained condition under which configurational differentiation remains locally maintainable without reversible restoration, temporal sequence, or causal grounding. Irreversibility does not establish time. Irreversibility does not establish causality. Irreversibility does not establish sequential progression. Irreversibility does not establish entropic grounding. Irreversibility remains fixed only as constrained maintainability asymmetry within readability maintainability. This paper does not establish a metaphysics of time, a theory of entropy, or a structure of temporal succession. It fixes only the local irreversibility conditions under which configurational differentiation remains constrained without transition into chronological continuity, reversible restoration, causal succession, or total configurational stabilization. No subject is presupposed. No temporal grounding is established. No sequential restoration is secured. No total irreversibility stabilization is completed. This paper is part of Kasei-Theory.