The Twelve Houses of Western Astrology as Cognitive Coordinates: A Structural Analysis via the 5W1H Model

English translation of the Japanese original published at https://doi.org/10.5281/zenodo.19511842 This paper proposes that the twelve astrological houses can be reformulated as a coordinate system defined by the intersection of six interrogative frames (5W1H: Who/What/How/Where/Why/When) and two conditions of experience (Personal/Social). Here, Social refers not to sociability but to the side established through relationship, sharing, and reception. Where is defined as a coordinate concept encompassing not only physical location but also affiliation, standpoint, and social position; When is defined as a temporal domain encompassing lifestyle, cycles, and temporal layers rather than clock time. The proposed correspondences are: 1/7=Who, 2/8=What, 3/9=How, 4/10=Where, 5/11=Why, 6/12=When. To avoid arbitrary selection, all symbolic keywords were extracted from publicly available listings (English Wikipedia, with fixed revisions), mechanically segmented into minimal units (tokens) without synonym merging or duplicate removal, and classified as ① (derivable), ② (derivable via external premises), or ③ (difficult to derive). A subset of ③ was further tagged as ③R (rule-derived) to isolate items originating from separate generative rules such as kinship-counting conventions or body-part correspondence tables. Of the 204 tokens evaluated, 57.4% were classified as ①, 33.3% as ②, and 9.3% as ③. All ③ tokens were recoverable as ③R, with body-part correspondences accounting for 78.9% of them. The paper aims not to assert historical origins but to present a structurally complete convergence target for existing symbolic vocabularies, offering a logical procedure and perspective for reducing arbitrariness in symbolic organization, comparison, and assignment.