This paper presents boundary within the first system of Kasei-Theory as a non-modal readability maintainability architecture. The paper does not propose a metaphysics of limits, a topology of external separation, an ontology of negation, a theory of spatial enclosure, or a structure of transcendental exteriority. Instead, it fixes boundary, maintainability limitation, configurational differentiation, unreadability, drift, residual differentiation, and non-totality as distributed structural positions within constrained local readability maintainability. Boundary is not treated as an external limit, but as a constrained condition under which configurational differentiation reaches local maintainability limitation without exteriority, negation, or total dissolution. Boundary does not establish outside. Boundary does not establish exteriority. Boundary does not establish negation. Unreadability does not establish external absence. Boundary does not establish total unreadability. Boundary remains fixed only as constrained maintainability limitation within readability maintainability. This paper fixes only the local boundary conditions under which configurational differentiation no longer remains maintainable without transition into ontological exteriority, universal collapse, total unreadability, or complete configurational erasure. No subject is presupposed. No ontological grounding is established. No external limit is secured. No total boundary stabilization is completed. This paper is part of Kasei-Theory.
Juza Minamikata (Mon,) studied this question.