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Recent JWST observations report a significant asymmetry in the apparent rotation directions of distant galaxies, challenging the expected parity symmetry of large-scale cosmology. This paper proposes a phenomenological holographic framework in which such an asymmetry may reflect boundary-to-bulk projection of angular momentum. Building on black hole thermodynamics and the holographic principle, the model treats the observable universe as a bulk region whose large-scale rotational bias is inherited from conserved geometric data on a two-dimensional event horizon. Instead of using a local delta-function mapping, the framework uses a phenomenological smearing kernel through which boundary chirality enters the bulk as an initial cosmological condition. The paper distinguishes this approach from torsion-based black hole cosmologies by avoiding modifications to classical bulk gravity and focusing on macroscopic conservation of angular momentum. It also gives falsifiable observational consequences, including redshift dependence, alignment with other large-scale cosmological axes, and disappearance of the effect under improved systematic-bias modeling. The proposal is intended as a conceptual bridge between reported galaxy spin anomalies and holographic cosmology, while recognizing that rigorous boundary-to-bulk propagators and further observational validation are required for a complete theory.