{
  "schema_version": "jp-election-municipality-proportional-swing-graph.v1",
  "dataset_id": "jp-election-db.derived-shape.graph",
  "family": "graph",
  "dataset": "municipality-proportional-swing-2025-2026",
  "source_release_version": "2026-05-03-v050",
  "selector": {
    "prefecture_code": "12",
    "prefecture_name": "千葉県",
    "prefecture_name_en": "Chiba",
    "party_id": "TMI",
    "party_label": "みらい",
    "party_label_en": "Team Mirai",
    "scope": "prefecture",
    "ranking_id": "",
    "ranking_label": "",
    "ranking_label_en": ""
  },
  "comparison": {
    "comparison_key": "20250720_hc_pr__20260208_hr_block",
    "baseline_election_set_key": "20250720_hc",
    "baseline_election_date": "2025-07-20",
    "baseline_vote_system": "pr",
    "target_election_set_key": "20260208_hr",
    "target_election_date": "2026-02-08",
    "target_vote_system": "block"
  },
  "metric": {
    "primary_metric_id": "votes_change_rate_pct",
    "primary_metric_label": "票数増減率",
    "secondary_metric_id": "votes_delta",
    "secondary_metric_label": "票数差"
  },
  "summary": {
    "point_grain": "municipality",
    "point_count": 60,
    "municipality_count": 60,
    "min_votes_change_rate_pct": 50.853493,
    "max_votes_change_rate_pct": 540.740741
  },
  "municipalities": [
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124630",
      "municipality_name": "鋸南町",
      "municipality_name_en": "Kyonan-machi",
      "baseline_votes": 27.0,
      "target_votes": 173.0,
      "votes_delta": 146.0,
      "votes_change_rate_pct": 540.740741,
      "baseline_vote_share_pct_muni": 0.812763,
      "target_vote_share_pct_muni": 4.925968,
      "vote_share_delta_pct_pt": 4.113205
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122343",
      "municipality_name": "南房総市",
      "municipality_name_en": "Minamiboso-shi",
      "baseline_votes": 149.0,
      "target_votes": 949.0,
      "votes_delta": 800.0,
      "votes_change_rate_pct": 536.912752,
      "baseline_vote_share_pct_muni": 0.959681,
      "target_vote_share_pct_muni": 5.872161,
      "vote_share_delta_pct_pt": 4.91248
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124036",
      "municipality_name": "九十九里町",
      "municipality_name_en": "Kujukuri-machi",
      "baseline_votes": 49.0,
      "target_votes": 271.0,
      "votes_delta": 222.0,
      "votes_change_rate_pct": 453.061224,
      "baseline_vote_share_pct_muni": 0.810587,
      "target_vote_share_pct_muni": 4.581572,
      "vote_share_delta_pct_pt": 3.770985
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "123498",
      "municipality_name": "東庄町",
      "municipality_name_en": "Tohnosho-machi",
      "baseline_votes": 47.0,
      "target_votes": 243.0,
      "votes_delta": 196.0,
      "votes_change_rate_pct": 417.021277,
      "baseline_vote_share_pct_muni": 0.845628,
      "target_vote_share_pct_muni": 4.536968,
      "vote_share_delta_pct_pt": 3.69134
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124273",
      "municipality_name": "長南町",
      "municipality_name_en": "Chonan-machi",
      "baseline_votes": 35.0,
      "target_votes": 179.0,
      "votes_delta": 144.0,
      "votes_change_rate_pct": 411.428571,
      "baseline_vote_share_pct_muni": 0.972222,
      "target_vote_share_pct_muni": 5.220181,
      "vote_share_delta_pct_pt": 4.247959
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122351",
      "municipality_name": "匝瑳市",
      "municipality_name_en": "Sosa-shi",
      "baseline_votes": 140.0,
      "target_votes": 708.0,
      "votes_delta": 568.0,
      "votes_change_rate_pct": 405.714286,
      "baseline_vote_share_pct_muni": 0.999358,
      "target_vote_share_pct_muni": 4.359874,
      "vote_share_delta_pct_pt": 3.360516
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124095",
      "municipality_name": "芝山町",
      "municipality_name_en": "Shibayama-machi",
      "baseline_votes": 27.0,
      "target_votes": 133.0,
      "votes_delta": 106.0,
      "votes_change_rate_pct": 392.592593,
      "baseline_vote_share_pct_muni": 0.957447,
      "target_vote_share_pct_muni": 5.129194,
      "vote_share_delta_pct_pt": 4.171747
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124265",
      "municipality_name": "長柄町",
      "municipality_name_en": "Nagara-machi",
      "baseline_votes": 31.0,
      "target_votes": 147.0,
      "votes_delta": 116.0,
      "votes_change_rate_pct": 374.193548,
      "baseline_vote_share_pct_muni": 1.013734,
      "target_vote_share_pct_muni": 5.253753,
      "vote_share_delta_pct_pt": 4.240019
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122025",
      "municipality_name": "銚子市",
      "municipality_name_en": "Choshi-shi",
      "baseline_votes": 238.0,
      "target_votes": 1123.0,
      "votes_delta": 885.0,
      "votes_change_rate_pct": 371.848739,
      "baseline_vote_share_pct_muni": 1.073474,
      "target_vote_share_pct_muni": 5.147598,
      "vote_share_delta_pct_pt": 4.074124
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122181",
      "municipality_name": "勝浦市",
      "municipality_name_en": "Katsuura-shi",
      "baseline_votes": 67.0,
      "target_votes": 306.0,
      "votes_delta": 239.0,
      "votes_change_rate_pct": 356.716418,
      "baseline_vote_share_pct_muni": 1.030769,
      "target_vote_share_pct_muni": 4.557641,
      "vote_share_delta_pct_pt": 3.526872
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "123293",
      "municipality_name": "栄町",
      "municipality_name_en": "Sakae-machi",
      "baseline_votes": 122.0,
      "target_votes": 555.0,
      "votes_delta": 433.0,
      "votes_change_rate_pct": 354.918033,
      "baseline_vote_share_pct_muni": 1.218173,
      "target_vote_share_pct_muni": 5.696982,
      "vote_share_delta_pct_pt": 4.478809
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "123420",
      "municipality_name": "神崎町",
      "municipality_name_en": "Kozaki-machi",
      "baseline_votes": 33.0,
      "target_votes": 149.0,
      "votes_delta": 116.0,
      "votes_change_rate_pct": 351.515152,
      "baseline_vote_share_pct_muni": 1.18068,
      "target_vote_share_pct_muni": 5.465884,
      "vote_share_delta_pct_pt": 4.285204
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122050",
      "municipality_name": "館山市",
      "municipality_name_en": "Tateyama-shi",
      "baseline_votes": 271.0,
      "target_votes": 1215.0,
      "votes_delta": 944.0,
      "votes_change_rate_pct": 348.339483,
      "baseline_vote_share_pct_muni": 1.47475,
      "target_vote_share_pct_muni": 6.354935,
      "vote_share_delta_pct_pt": 4.880185
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122386",
      "municipality_name": "いすみ市",
      "municipality_name_en": "Isumi-shi",
      "baseline_votes": 201.0,
      "target_votes": 884.0,
      "votes_delta": 683.0,
      "votes_change_rate_pct": 339.800995,
      "baseline_vote_share_pct_muni": 1.26288,
      "target_vote_share_pct_muni": 5.639913,
      "vote_share_delta_pct_pt": 4.377033
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122378",
      "municipality_name": "山武市",
      "municipality_name_en": "Sammu-shi",
      "baseline_votes": 218.0,
      "target_votes": 953.0,
      "votes_delta": 735.0,
      "votes_change_rate_pct": 337.155963,
      "baseline_vote_share_pct_muni": 1.070885,
      "target_vote_share_pct_muni": 4.931691,
      "vote_share_delta_pct_pt": 3.860806
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124230",
      "municipality_name": "長生村",
      "municipality_name_en": "Chosei-mura",
      "baseline_votes": 81.0,
      "target_votes": 346.0,
      "votes_delta": 265.0,
      "votes_change_rate_pct": 327.160494,
      "baseline_vote_share_pct_muni": 1.299743,
      "target_vote_share_pct_muni": 5.839662,
      "vote_share_delta_pct_pt": 4.539919
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122262",
      "municipality_name": "富津市",
      "municipality_name_en": "Futtsu-shi",
      "baseline_votes": 206.01,
      "target_votes": 866.0,
      "votes_delta": 659.99,
      "votes_change_rate_pct": 320.367943,
      "baseline_vote_share_pct_muni": 1.153213,
      "target_vote_share_pct_muni": 4.688938,
      "vote_share_delta_pct_pt": 3.535725
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122360",
      "municipality_name": "香取市",
      "municipality_name_en": "Katori-shi",
      "baseline_votes": 344.0,
      "target_votes": 1409.0,
      "votes_delta": 1065.0,
      "votes_change_rate_pct": 309.593023,
      "baseline_vote_share_pct_muni": 1.173541,
      "target_vote_share_pct_muni": 4.942472,
      "vote_share_delta_pct_pt": 3.768931
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124109",
      "municipality_name": "横芝光町",
      "municipality_name_en": "Yokoshibahikari-machi",
      "baseline_votes": 104.0,
      "target_votes": 423.0,
      "votes_delta": 319.0,
      "votes_change_rate_pct": 306.730769,
      "baseline_vote_share_pct_muni": 1.061008,
      "target_vote_share_pct_muni": 4.623456,
      "vote_share_delta_pct_pt": 3.562448
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122238",
      "municipality_name": "鴨川市",
      "municipality_name_en": "Kamogawa-shi",
      "baseline_votes": 194.862,
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      "votes_delta": 594.138,
      "votes_change_rate_pct": 304.901931,
      "baseline_vote_share_pct_muni": 1.42955,
      "target_vote_share_pct_muni": 5.680346,
      "vote_share_delta_pct_pt": 4.250796
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122106",
      "municipality_name": "茂原市",
      "municipality_name_en": "Mobara-shi",
      "baseline_votes": 572.0,
      "target_votes": 2274.0,
      "votes_delta": 1702.0,
      "votes_change_rate_pct": 297.552448,
      "baseline_vote_share_pct_muni": 1.50816,
      "target_vote_share_pct_muni": 6.18624,
      "vote_share_delta_pct_pt": 4.67808
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124419",
      "municipality_name": "大多喜町",
      "municipality_name_en": "Otaki-machi",
      "baseline_votes": 48.0,
      "target_votes": 190.0,
      "votes_delta": 142.0,
      "votes_change_rate_pct": 295.833333,
      "baseline_vote_share_pct_muni": 1.247401,
      "target_vote_share_pct_muni": 4.850651,
      "vote_share_delta_pct_pt": 3.60325
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122254",
      "municipality_name": "君津市",
      "municipality_name_en": "Kimitsu-shi",
      "baseline_votes": 506.0,
      "target_votes": 1969.0,
      "votes_delta": 1463.0,
      "votes_change_rate_pct": 289.130435,
      "baseline_vote_share_pct_muni": 1.376421,
      "target_vote_share_pct_muni": 5.536186,
      "vote_share_delta_pct_pt": 4.159765
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124222",
      "municipality_name": "睦沢町",
      "municipality_name_en": "Mutsuzawa-machi",
      "baseline_votes": 45.0,
      "target_votes": 175.0,
      "votes_delta": 130.0,
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      "baseline_vote_share_pct_muni": 1.357057,
      "target_vote_share_pct_muni": 5.42804,
      "vote_share_delta_pct_pt": 4.070983
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122394",
      "municipality_name": "大網白里市",
      "municipality_name_en": "Oamishirasato-shi",
      "baseline_votes": 370.0,
      "target_votes": 1407.0,
      "votes_delta": 1037.0,
      "votes_change_rate_pct": 280.27027,
      "baseline_vote_share_pct_muni": 1.634637,
      "target_vote_share_pct_muni": 6.500647,
      "vote_share_delta_pct_pt": 4.86601
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122300",
      "municipality_name": "八街市",
      "municipality_name_en": "Yachimata-shi",
      "baseline_votes": 318.942,
      "target_votes": 1191.0,
      "votes_delta": 872.058,
      "votes_change_rate_pct": 273.422127,
      "baseline_vote_share_pct_muni": 1.18986,
      "target_vote_share_pct_muni": 4.748425,
      "vote_share_delta_pct_pt": 3.558565
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124435",
      "municipality_name": "御宿町",
      "municipality_name_en": "Onjuku-machi",
      "baseline_votes": 55.0,
      "target_votes": 203.0,
      "votes_delta": 148.0,
      "votes_change_rate_pct": 269.090909,
      "baseline_vote_share_pct_muni": 1.655629,
      "target_vote_share_pct_muni": 6.016598,
      "vote_share_delta_pct_pt": 4.360969
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124249",
      "municipality_name": "白子町",
      "municipality_name_en": "Shirako-machi",
      "baseline_votes": 62.0,
      "target_votes": 223.0,
      "votes_delta": 161.0,
      "votes_change_rate_pct": 259.677419,
      "baseline_vote_share_pct_muni": 1.268672,
      "target_vote_share_pct_muni": 4.745691,
      "vote_share_delta_pct_pt": 3.477019
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122130",
      "municipality_name": "東金市",
      "municipality_name_en": "Togane-shi",
      "baseline_votes": 373.0,
      "target_votes": 1326.0,
      "votes_delta": 953.0,
      "votes_change_rate_pct": 255.495979,
      "baseline_vote_share_pct_muni": 1.522138,
      "target_vote_share_pct_muni": 5.757957,
      "vote_share_delta_pct_pt": 4.235819
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122190",
      "municipality_name": "市原市",
      "municipality_name_en": "Ichihara-shi",
      "baseline_votes": 1942.022,
      "target_votes": 6893.0,
      "votes_delta": 4950.978,
      "votes_change_rate_pct": 254.939336,
      "baseline_vote_share_pct_muni": 1.693132,
      "target_vote_share_pct_muni": 6.138351,
      "vote_share_delta_pct_pt": 4.445219
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "124214",
      "municipality_name": "一宮町",
      "municipality_name_en": "Ichinomiya-machi",
      "baseline_votes": 125.0,
      "target_votes": 437.0,
      "votes_delta": 312.0,
      "votes_change_rate_pct": 249.6,
      "baseline_vote_share_pct_muni": 2.093802,
      "target_vote_share_pct_muni": 7.506012,
      "vote_share_delta_pct_pt": 5.41221
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122122",
      "municipality_name": "佐倉市",
      "municipality_name_en": "Sakura-shi",
      "baseline_votes": 1780.0,
      "target_votes": 6183.0,
      "votes_delta": 4403.0,
      "votes_change_rate_pct": 247.359551,
      "baseline_vote_share_pct_muni": 2.168325,
      "target_vote_share_pct_muni": 7.70765,
      "vote_share_delta_pct_pt": 5.539325
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "123471",
      "municipality_name": "多古町",
      "municipality_name_en": "Tako-machi",
      "baseline_votes": 80.0,
      "target_votes": 275.0,
      "votes_delta": 195.0,
      "votes_change_rate_pct": 243.75,
      "baseline_vote_share_pct_muni": 1.345895,
      "target_vote_share_pct_muni": 4.574946,
      "vote_share_delta_pct_pt": 3.229051
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122297",
      "municipality_name": "袖ケ浦市",
      "municipality_name_en": "Sodegaura-shi",
      "baseline_votes": 574.0,
      "target_votes": 1973.0,
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}