A Twofold Typology of Intuition in Jungian Psychology: A Conceptual Proposal for the "Sixth Sense" and "Seventh Sense"

English translation of the Japanese original published at https://doi.org/10.5281/zenodo.19527879 Jungian psychology distinguishes two layers of the unconscious: the personal unconscious, which contains individually acquired memories, repressions, and affective complexes, and the collective unconscious, which consists of archetypes understood as universal psychological structures shared across humanity. Despite this theoretical differentiation at the structural level, the intuitive insights that arise from each layer are conventionally subsumed under the single term "intuition," leaving a conceptual gap in Jungian terminology. This paper identifies this asymmetry as a theoretical inconsistency and proposes a working framework to address it. As a provisional descriptive vocabulary, we first distinguish "personal intuition" from "archetypal intuition." We then propose the terms "Sixth Sense" (dairokkan) and "Seventh Sense" (dainanakan) as designations that capture an epistemological distinction the provisional labels cannot convey. The naming reflects a principled sensory-epistemological argument: whereas the personal unconscious is constituted by information experientially acquired through the five senses, the existence of the collective unconscious—if accepted as a working hypothesis—implies a channel for receiving trans-individual information that cannot be reduced to ordinary sensory experience. The paper discusses the theoretical rationale for this typology, provisional identification criteria, the advantages and limitations of the proposed nomenclature, anticipated objections, and directions for future research. The proposal is presented not as a definitive taxonomy but as a conceptual scaffold to facilitate more precise description, clinical differentiation, and empirical investigation within Jungian psychology.