Hubble Tension Route Map 2026 v1.6.5 is an open, bilingual educational reference package for understanding the Hubble tension. It is designed as a beginner-oriented route map to the observational probes, theoretical routes, constraints, and common failure boundaries involved in the current discussion. This record archives the public-final-clean repository package, including Japanese and English reader editions, compact print-oriented materials, claim-boundary documentation, repository metadata, and public-facing orientation materials. The project does not claim to solve the Hubble tension, does not propose a new cosmological model, does not argue that ΛCDM has collapsed, and does not present an expert-reviewed cosmological conclusion. It is an educational guide for readers who want to understand why different observational routes can lead to different inferred values of H0, and why the problem is not reducible to a simple numerical adjustment. The guide introduces major observational and interpretive routes, including the distance ladder, Cepheids, Type Ia supernovae, CMB, BAO, JWST-era distance-indicator checks, DESI-era large-scale-structure constraints, S8 and structure-growth context, and model-consistency boundaries. The emphasis is on orientation rather than solution: what each probe measures, how it enters the Hubble-tension discussion, and why proposed explanations must preserve consistency across multiple cosmological observables. This package is intended for beginners, science-interested readers, educators, and non-specialists seeking a careful entry point into the Hubble tension. It may also be useful as a compact teaching or reference aid, provided that its claim boundary is preserved. This is not a peer-reviewed research paper, not a cosmological data analysis, not a likelihood comparison, and not a replacement for expert review or primary literature. It should be cited and reused as an educational reference resource.