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      "densityNote": "Tile payload count is hierarchy evidence, not building count or completeness."
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      "license": "https://www.mlit.go.jp/plateau/site-policy/",
      "densityNote": "Tile payload count is hierarchy evidence, not building count or completeness."
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  "coverage": {
    "geographic": "23-ward source hierarchy plus reachable binary samples; gaps explicitly unverified",
    "detailed": [
      "Shinjuku 13104",
      "Tsukishima / Chuo 13102",
      "Setagaya 13112"
    ],
    "editorial": "Existing FOW records audited separately; no invented verified place",
    "experience": "LAB return mechanism"
  }
}