{
  "version": "2026-04-30-real-data-v1",
  "generatedAt": "2026-04-29T20:54:55.364Z",
  "prefecture": {
    "code": "10",
    "slug": "gunma",
    "name": "群馬県",
    "region": "関東",
    "center": {
      "lat": 36.39111,
      "lng": 139.06083,
      "zoom": 7
    }
  },
  "metrics": {
    "transactionPrice": {
      "median": 9300000,
      "average": 19715770,
      "count": 4370,
      "unit": "円",
      "period": "2024",
      "sourceId": "reinfolib-xit001",
      "missingReason": null
    },
    "landPrice": {
      "median": 32150,
      "average": 37627,
      "count": 516,
      "unit": "円/m²",
      "period": "2026",
      "sourceId": "reinfolib-xct001",
      "missingReason": null
    },
    "population": {
      "latest": 1939110,
      "year": 2020,
      "changeRate5y": null,
      "unit": "人",
      "sourceId": "estat-population",
      "missingReason": "2020年国勢調査の都道府県別総人口を掲載。5年増減率は同一表内で算出できる過去年が未確認のため未掲載です。"
    },
    "hazardRisk": {
      "score": null,
      "level": "要地域確認",
      "summary": "群馬県の災害リスクは住所、地形、自治体ハザードマップで判定が変わります。Phase 1では国土数値情報の公式入口を確認し、重い災害GeoJSONの全面同梱は行っていません。",
      "sourceId": "ksj-hazard",
      "missingReason": "国土数値情報の災害データは住所単位の確認が必要なため、県別の単一スコアには集約していません。",
      "indicators": [
        {
          "label": "住所単位確認",
          "value": "自治体ハザードマップ必須",
          "sourceId": "ksj-hazard"
        },
        {
          "label": "Phase 1方針",
          "value": "巨大GeoJSON同梱なし",
          "sourceId": "ksj-hazard"
        }
      ]
    }
  },
  "landPrice": {
    "municipalityRanking": [
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "median": 53700,
        "average": 51513,
        "count": 86,
        "lat": 36.397416,
        "lng": 139.086192
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "median": 53550,
        "average": 58313,
        "count": 88,
        "lat": 36.331738,
        "lng": 139.009788
      },
      {
        "municipalityCode": "10206",
        "municipality": "沼田市",
        "median": 39400,
        "average": 32350,
        "count": 6,
        "lat": 36.650212,
        "lng": 139.046241
      },
      {
        "municipalityCode": "10204",
        "municipality": "伊勢崎市",
        "median": 35800,
        "average": 33026,
        "count": 46,
        "lat": 36.315203,
        "lng": 139.214811
      },
      {
        "municipalityCode": "10205",
        "municipality": "太田市",
        "median": 34900,
        "average": 36167,
        "count": 70,
        "lat": 36.29188,
        "lng": 139.359921
      },
      {
        "municipalityCode": "10207",
        "municipality": "館林市",
        "median": 34600,
        "average": 32079,
        "count": 28,
        "lat": 36.248029,
        "lng": 139.530302
      },
      {
        "municipalityCode": "10464",
        "municipality": "玉村町",
        "median": 32900,
        "average": 33733,
        "count": 6,
        "lat": 36.306116,
        "lng": 139.122016
      },
      {
        "municipalityCode": "10345",
        "municipality": "吉岡町",
        "median": 32350,
        "average": 33167,
        "count": 6,
        "lat": 36.444042,
        "lng": 139.013034
      },
      {
        "municipalityCode": "10210",
        "municipality": "富岡市",
        "median": 31600,
        "average": 31850,
        "count": 8,
        "lat": 36.255205,
        "lng": 138.893533
      },
      {
        "municipalityCode": "10524",
        "municipality": "大泉町",
        "median": 30400,
        "average": 29500,
        "count": 16,
        "lat": 36.253046,
        "lng": 139.409141
      },
      {
        "municipalityCode": "10203",
        "municipality": "桐生市",
        "median": 28650,
        "average": 25666,
        "count": 44,
        "lat": 36.414858,
        "lng": 139.328438
      },
      {
        "municipalityCode": "10209",
        "municipality": "藤岡市",
        "median": 27700,
        "average": 24489,
        "count": 18,
        "lat": 36.232736,
        "lng": 139.066896
      },
      {
        "municipalityCode": "10522",
        "municipality": "明和町",
        "median": 27500,
        "average": 24733,
        "count": 6,
        "lat": 36.209895,
        "lng": 139.536609
      },
      {
        "municipalityCode": "10525",
        "municipality": "邑楽町",
        "median": 27100,
        "average": 25450,
        "count": 8,
        "lat": 36.253836,
        "lng": 139.465805
      },
      {
        "municipalityCode": "10208",
        "municipality": "渋川市",
        "median": 26350,
        "average": 28481,
        "count": 16,
        "lat": 36.501232,
        "lng": 139.004593
      },
      {
        "municipalityCode": "10426",
        "municipality": "草津町",
        "median": 25750,
        "average": 25750,
        "count": 4,
        "lat": 36.619005,
        "lng": 138.596997
      },
      {
        "municipalityCode": "10212",
        "municipality": "みどり市",
        "median": 24500,
        "average": 24275,
        "count": 8,
        "lat": 36.405105,
        "lng": 139.275198
      },
      {
        "municipalityCode": "10211",
        "municipality": "安中市",
        "median": 24200,
        "average": 23850,
        "count": 8,
        "lat": 36.320323,
        "lng": 138.866498
      },
      {
        "municipalityCode": "10421",
        "municipality": "中之条町",
        "median": 23250,
        "average": 23250,
        "count": 4,
        "lat": 36.588346,
        "lng": 138.845303
      },
      {
        "municipalityCode": "10344",
        "municipality": "榛東村",
        "median": 20700,
        "average": 20700,
        "count": 4,
        "lat": 36.436292,
        "lng": 138.982667
      }
    ],
    "points": [
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 177000,
        "lat": 36.32674528,
        "lng": 139.009625,
        "address": "真町８番外"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 177000,
        "lat": 36.32674528,
        "lng": 139.009625,
        "address": "真町８番外"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 134000,
        "lat": 36.3212375,
        "lng": 139.02215889,
        "address": "岩押町１６－２"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 134000,
        "lat": 36.3212375,
        "lng": 139.02215889,
        "address": "岩押町１６－２"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 112000,
        "lat": 36.32749694,
        "lng": 139.00075694,
        "address": "柳川町１４６番４外"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 112000,
        "lat": 36.32749694,
        "lng": 139.00075694,
        "address": "柳川町１４６番４外"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 106000,
        "lat": 36.31789306,
        "lng": 139.00785306,
        "address": "竜見町３番２"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 106000,
        "lat": 36.31789306,
        "lng": 139.00785306,
        "address": "竜見町３番２"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 95800,
        "lat": 36.33130556,
        "lng": 139.02552778,
        "address": "江木町字若宮１４７１番１"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 95800,
        "lat": 36.33130556,
        "lng": 139.02552778,
        "address": "江木町字若宮１４７１番１"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 92300,
        "lat": 36.38829167,
        "lng": 139.06047667,
        "address": "大手町１－１０－１１"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 92000,
        "lat": 36.38829167,
        "lng": 139.06047667,
        "address": "大手町１－１０－１１"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 89300,
        "lat": 36.32436306,
        "lng": 139.03177889,
        "address": "高関町字岡久保５１３番２"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 89200,
        "lat": 36.32436306,
        "lng": 139.03177889,
        "address": "高関町字岡久保５１３番２"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 87800,
        "lat": 36.37848028,
        "lng": 139.07347417,
        "address": "南町４丁目２１番３外"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 87300,
        "lat": 36.37848028,
        "lng": 139.07347417,
        "address": "南町４丁目２１番３外"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 86200,
        "lat": 36.313595,
        "lng": 139.02674806,
        "address": "上中居町字咲地蔵４８３番１２"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 86100,
        "lat": 36.313595,
        "lng": 139.02674806,
        "address": "上中居町字咲地蔵４８３番１２"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 84800,
        "lat": 36.37707722,
        "lng": 139.06357528,
        "address": "南町２丁目２８番８外"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 84800,
        "lat": 36.37707722,
        "lng": 139.06357528,
        "address": "南町２丁目２８番８外"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 79800,
        "lat": 36.38300472,
        "lng": 139.07957056,
        "address": "文京町１－２４－１４"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 79700,
        "lat": 36.38300472,
        "lng": 139.07957056,
        "address": "文京町１－２４－１４"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 78900,
        "lat": 36.31566694,
        "lng": 139.04220194,
        "address": "中居町３丁目３１番１２"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 78900,
        "lat": 36.31566694,
        "lng": 139.04220194,
        "address": "中居町３丁目３１番１２"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 77700,
        "lat": 36.37334611,
        "lng": 139.08813111,
        "address": "天川町５０番４"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 77600,
        "lat": 36.37334611,
        "lng": 139.08813111,
        "address": "天川町５０番４"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 74900,
        "lat": 36.34569444,
        "lng": 138.98561111,
        "address": "上並榎町字八反田２０５番４"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 74900,
        "lat": 36.34569444,
        "lng": 138.98561111,
        "address": "上並榎町字八反田２０５番４"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 74400,
        "lat": 36.3399325,
        "lng": 139.00220306,
        "address": "飯塚町字大道東１００３番１８"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 74200,
        "lat": 36.3399325,
        "lng": 139.00220306,
        "address": "飯塚町字大道東１００３番１８"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 73900,
        "lat": 36.35137861,
        "lng": 138.99099278,
        "address": "下小鳥町７６番９"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 73800,
        "lat": 36.35137861,
        "lng": 138.99099278,
        "address": "下小鳥町７６番９"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 72900,
        "lat": 36.39794444,
        "lng": 139.08136111,
        "address": "日吉町２丁目３１番２６"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 72600,
        "lat": 36.39794444,
        "lng": 139.08136111,
        "address": "日吉町２丁目３１番２６"
      },
      {
        "municipalityCode": "10205",
        "municipality": "太田市",
        "pricePerSquareMeter": 72200,
        "lat": 36.28582528,
        "lng": 139.38324194,
        "address": "飯田町７５４番"
      },
      {
        "municipalityCode": "10205",
        "municipality": "太田市",
        "pricePerSquareMeter": 71700,
        "lat": 36.28582528,
        "lng": 139.38324194,
        "address": "飯田町７５４番"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 70600,
        "lat": 36.3707075,
        "lng": 139.06866694,
        "address": "六供町２丁目３５番８外"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 70500,
        "lat": 36.3707075,
        "lng": 139.06866694,
        "address": "六供町２丁目３５番８外"
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "pricePerSquareMeter": 68600,
        "lat": 36.38723111,
        "lng": 139.08692611,
        "address": "朝日町３－３１－１４"
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "pricePerSquareMeter": 68500,
        "lat": 36.35911889,
        "lng": 139.01919194,
        "address": "小八木町２０２８番４"
      }
    ],
    "percentiles": {
      "p25": 24300,
      "p50": 32150,
      "p75": 44400
    }
  },
  "transactions": {
    "histogram": [
      {
        "label": "0-1000万円",
        "min": 0,
        "max": 10000000,
        "count": 2270
      },
      {
        "label": "1000万-2000万円",
        "min": 10000000,
        "max": 20000000,
        "count": 920
      },
      {
        "label": "2000万-3000万円",
        "min": 20000000,
        "max": 30000000,
        "count": 539
      },
      {
        "label": "3000万-5000万円",
        "min": 30000000,
        "max": 50000000,
        "count": 421
      },
      {
        "label": "5000万-1億円",
        "min": 50000000,
        "max": 100000000,
        "count": 135
      },
      {
        "label": "1億円以上",
        "min": 100000000,
        "max": null,
        "count": 85
      }
    ],
    "municipalitySummary": [
      {
        "municipalityCode": "10444",
        "municipality": "利根郡川場村",
        "median": 17000000,
        "average": 17000000,
        "count": 1,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10202",
        "municipality": "高崎市",
        "median": 15000000,
        "average": 30407096,
        "count": 909,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10201",
        "municipality": "前橋市",
        "median": 13000000,
        "average": 23341911,
        "count": 739,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10205",
        "municipality": "太田市",
        "median": 12000000,
        "average": 21420034,
        "count": 501,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10204",
        "municipality": "伊勢崎市",
        "median": 11000000,
        "average": 17931411,
        "count": 453,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10524",
        "municipality": "邑楽郡大泉町",
        "median": 11000000,
        "average": 14349000,
        "count": 90,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10464",
        "municipality": "佐波郡玉村町",
        "median": 9850000,
        "average": 14734194,
        "count": 62,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10345",
        "municipality": "北群馬郡吉岡町",
        "median": 8700000,
        "average": 12622464,
        "count": 69,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10212",
        "municipality": "みどり市",
        "median": 8600000,
        "average": 12546162,
        "count": 99,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10344",
        "municipality": "北群馬郡榛東村",
        "median": 8500000,
        "average": 11262857,
        "count": 35,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10207",
        "municipality": "館林市",
        "median": 8050000,
        "average": 14126517,
        "count": 178,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10525",
        "municipality": "邑楽郡邑楽町",
        "median": 7950000,
        "average": 15160714,
        "count": 42,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10522",
        "municipality": "邑楽郡明和町",
        "median": 7400000,
        "average": 11640345,
        "count": 29,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10209",
        "municipality": "藤岡市",
        "median": 7300000,
        "average": 24353729,
        "count": 118,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10523",
        "municipality": "邑楽郡千代田町",
        "median": 6800000,
        "average": 159881333,
        "count": 15,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10208",
        "municipality": "渋川市",
        "median": 6000000,
        "average": 9329111,
        "count": 135,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10211",
        "municipality": "安中市",
        "median": 6000000,
        "average": 16870223,
        "count": 130,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10426",
        "municipality": "吾妻郡草津町",
        "median": 5700000,
        "average": 7547647,
        "count": 17,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10521",
        "municipality": "邑楽郡板倉町",
        "median": 5550000,
        "average": 18522143,
        "count": 14,
        "lat": null,
        "lng": null
      },
      {
        "municipalityCode": "10206",
        "municipality": "沼田市",
        "median": 5150000,
        "average": 8795513,
        "count": 78,
        "lat": null,
        "lng": null
      }
    ],
    "sampleCount": 4370,
    "percentiles": {
      "p25": 3500000,
      "p50": 9300000,
      "p75": 20000000
    }
  },
  "populationTrend": [
    {
      "year": 2020,
      "value": 1939110,
      "sourceId": "estat-population"
    }
  ],
  "hazardRisk": {
    "score": null,
    "level": "要地域確認",
    "summary": "群馬県の災害リスクは住所、地形、自治体ハザードマップで判定が変わります。Phase 1では国土数値情報の公式入口を確認し、重い災害GeoJSONの全面同梱は行っていません。",
    "sourceId": "ksj-hazard",
    "missingReason": "国土数値情報の災害データは住所単位の確認が必要なため、県別の単一スコアには集約していません。",
    "indicators": [
      {
        "label": "住所単位確認",
        "value": "自治体ハザードマップ必須",
        "sourceId": "ksj-hazard"
      },
      {
        "label": "Phase 1方針",
        "value": "巨大GeoJSON同梱なし",
        "sourceId": "ksj-hazard"
      }
    ]
  },
  "sources": [
    {
      "id": "reinfolib-xit001",
      "name": "不動産情報ライブラリ XIT001",
      "url": "https://www.reinfolib.mlit.go.jp/help/apiManual/xit001/",
      "retrievedAt": "2026-04-29T20:54:55.364Z",
      "period": "2024",
      "notes": "不動産取引価格情報を都道府県別・四半期別に取得し、取引価格を集計しています。"
    },
    {
      "id": "reinfolib-xct001",
      "name": "不動産情報ライブラリ XCT001",
      "url": "https://www.reinfolib.mlit.go.jp/help/apiManual/xct001/",
      "retrievedAt": "2026-04-29T20:54:55.364Z",
      "period": "2026",
      "notes": "地価公示の住宅地データを取得し、1㎡当たり価格を集計しています。"
    },
    {
      "id": "estat-population",
      "name": "e-Stat 国勢調査 人口",
      "url": "https://www.e-stat.go.jp/api/api-info/e-stat-manual3-0",
      "retrievedAt": "2026-04-29T20:54:55.364Z",
      "period": "2020",
      "notes": "getStatsList/getMetaInfoで統計表と次元を確認し、getStatsDataで都道府県別総人口を取得しています。"
    },
    {
      "id": "ksj-hazard",
      "name": "国土数値情報",
      "url": "https://nlftp.mlit.go.jp/ksj/",
      "retrievedAt": "2026-04-29T20:54:55.364Z",
      "period": "dataset-specific",
      "notes": "Phase 1では巨大GeoJSONを同梱せず、公式災害・地理空間データの確認導線と地域確認注意を掲載しています。"
    },
    {
      "id": "gsi-tiles",
      "name": "国土地理院 地理院タイル",
      "url": "https://maps.gsi.go.jp/development/",
      "retrievedAt": "2026-04-29T20:54:55.364Z",
      "period": "current",
      "notes": "MapLibre GL JSの背景地図として標準地図タイルを利用します。"
    }
  ],
  "quality": {
    "missingReasons": [
      "2020年国勢調査の都道府県別総人口を掲載。5年増減率は同一表内で算出できる過去年が未確認のため未掲載です。",
      "国土数値情報の災害データは住所単位の確認が必要なため、県別の単一スコアには集約していません。"
    ],
    "warnings": [
      "取引価格は2024年の不動産取引価格情報を集計しており、個別物件の査定額ではありません。",
      "地価公示は住宅地division=00の1㎡当たり価格を集計しています。",
      "災害リスクは住所単位で変わるため、自治体ハザードマップで必ず確認してください。"
    ]
  },
  "ranking": {
    "landPriceRank": 31,
    "transactionRank": 17,
    "populationRank": 18
  }
}