{
  "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": "JHP",
    "party_label": "保守",
    "party_label_en": "Japan Conservative Party",
    "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": -74.860836,
    "max_votes_change_rate_pct": -33.777778
  },
  "municipalities": [
    {
      "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": 225.0,
      "target_votes": 149.0,
      "votes_delta": -76.0,
      "votes_change_rate_pct": -33.777778,
      "baseline_vote_share_pct_muni": 3.722084,
      "target_vote_share_pct_muni": 2.519019,
      "vote_share_delta_pct_pt": -1.203065
    },
    {
      "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": 74.0,
      "target_votes": 49.0,
      "votes_delta": -25.0,
      "votes_change_rate_pct": -33.783784,
      "baseline_vote_share_pct_muni": 2.227574,
      "target_vote_share_pct_muni": 1.395216,
      "vote_share_delta_pct_pt": -0.832358
    },
    {
      "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": 93.0,
      "target_votes": 61.0,
      "votes_delta": -32.0,
      "votes_change_rate_pct": -34.408602,
      "baseline_vote_share_pct_muni": 2.41684,
      "target_vote_share_pct_muni": 1.557314,
      "vote_share_delta_pct_pt": -0.859526
    },
    {
      "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": 222.0,
      "target_votes": 144.0,
      "votes_delta": -78.0,
      "votes_change_rate_pct": -35.135135,
      "baseline_vote_share_pct_muni": 3.718593,
      "target_vote_share_pct_muni": 2.473377,
      "vote_share_delta_pct_pt": -1.245216
    },
    {
      "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": 101.0,
      "target_votes": 62.0,
      "votes_delta": -39.0,
      "votes_change_rate_pct": -38.613861,
      "baseline_vote_share_pct_muni": 3.613596,
      "target_vote_share_pct_muni": 2.274395,
      "vote_share_delta_pct_pt": -1.339201
    },
    {
      "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": 406.0,
      "target_votes": 247.0,
      "votes_delta": -159.0,
      "votes_change_rate_pct": -39.162562,
      "baseline_vote_share_pct_muni": 2.614968,
      "target_vote_share_pct_muni": 1.528371,
      "vote_share_delta_pct_pt": -1.086597
    },
    {
      "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": 325.0,
      "target_votes": 194.0,
      "votes_delta": -131.0,
      "votes_change_rate_pct": -40.307692,
      "baseline_vote_share_pct_muni": 3.31565,
      "target_vote_share_pct_muni": 2.12045,
      "vote_share_delta_pct_pt": -1.1952
    },
    {
      "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": 185.0,
      "target_votes": 110.0,
      "votes_delta": -75.0,
      "votes_change_rate_pct": -40.540541,
      "baseline_vote_share_pct_muni": 3.328535,
      "target_vote_share_pct_muni": 2.053771,
      "vote_share_delta_pct_pt": -1.274764
    },
    {
      "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": 96.0,
      "target_votes": 57.0,
      "votes_delta": -39.0,
      "votes_change_rate_pct": -40.625,
      "baseline_vote_share_pct_muni": 3.404255,
      "target_vote_share_pct_muni": 2.198226,
      "vote_share_delta_pct_pt": -1.206029
    },
    {
      "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": 123.0,
      "target_votes": 72.0,
      "votes_delta": -51.0,
      "votes_change_rate_pct": -41.463415,
      "baseline_vote_share_pct_muni": 3.702589,
      "target_vote_share_pct_muni": 2.133966,
      "vote_share_delta_pct_pt": -1.568623
    },
    {
      "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": 1557.0,
      "target_votes": 884.0,
      "votes_delta": -673.0,
      "votes_change_rate_pct": -43.224149,
      "baseline_vote_share_pct_muni": 4.105255,
      "target_vote_share_pct_muni": 2.404853,
      "vote_share_delta_pct_pt": -1.700402
    },
    {
      "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": 164.0,
      "target_votes": 91.0,
      "votes_delta": -73.0,
      "votes_change_rate_pct": -44.512195,
      "baseline_vote_share_pct_muni": 3.355842,
      "target_vote_share_pct_muni": 1.936582,
      "vote_share_delta_pct_pt": -1.41926
    },
    {
      "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": 854.0,
      "target_votes": 470.0,
      "votes_delta": -384.0,
      "votes_change_rate_pct": -44.964871,
      "baseline_vote_share_pct_muni": 3.851879,
      "target_vote_share_pct_muni": 2.154382,
      "vote_share_delta_pct_pt": -1.697497
    },
    {
      "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": 489.0,
      "target_votes": 264.0,
      "votes_delta": -225.0,
      "votes_change_rate_pct": -46.01227,
      "baseline_vote_share_pct_muni": 3.490613,
      "target_vote_share_pct_muni": 1.625716,
      "vote_share_delta_pct_pt": -1.864897
    },
    {
      "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": 428.0,
      "target_votes": 230.0,
      "votes_delta": -198.0,
      "votes_change_rate_pct": -46.261682,
      "baseline_vote_share_pct_muni": 3.139902,
      "target_vote_share_pct_muni": 1.655868,
      "vote_share_delta_pct_pt": -1.484034
    },
    {
      "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": 1079.0,
      "target_votes": 579.0,
      "votes_delta": -500.0,
      "votes_change_rate_pct": -46.339203,
      "baseline_vote_share_pct_muni": 4.403183,
      "target_vote_share_pct_muni": 2.514221,
      "vote_share_delta_pct_pt": -1.888962
    },
    {
      "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": 73.0,
      "target_votes": 39.0,
      "votes_delta": -34.0,
      "votes_change_rate_pct": -46.575342,
      "baseline_vote_share_pct_muni": 2.201448,
      "target_vote_share_pct_muni": 1.209677,
      "vote_share_delta_pct_pt": -0.991771
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122220",
      "municipality_name": "我孫子市",
      "municipality_name_en": "Abiko-shi",
      "baseline_votes": 3186.0,
      "target_votes": 1701.0,
      "votes_delta": -1485.0,
      "votes_change_rate_pct": -46.610169,
      "baseline_vote_share_pct_muni": 4.925484,
      "target_vote_share_pct_muni": 2.66698,
      "vote_share_delta_pct_pt": -2.258504
    },
    {
      "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": 561.0,
      "target_votes": 299.0,
      "votes_delta": -262.0,
      "votes_change_rate_pct": -46.702317,
      "baseline_vote_share_pct_muni": 3.524755,
      "target_vote_share_pct_muni": 1.907618,
      "vote_share_delta_pct_pt": -1.617137
    },
    {
      "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": 635.0,
      "target_votes": 337.0,
      "votes_delta": -298.0,
      "votes_change_rate_pct": -46.929134,
      "baseline_vote_share_pct_muni": 3.455594,
      "target_vote_share_pct_muni": 1.762644,
      "vote_share_delta_pct_pt": -1.69295
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122068",
      "municipality_name": "木更津市",
      "municipality_name_en": "Kisarazu-shi",
      "baseline_votes": 2910.0,
      "target_votes": 1518.0,
      "votes_delta": -1392.0,
      "votes_change_rate_pct": -47.835052,
      "baseline_vote_share_pct_muni": 4.986121,
      "target_vote_share_pct_muni": 2.702222,
      "vote_share_delta_pct_pt": -2.283899
    },
    {
      "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": 775.0,
      "target_votes": 401.0,
      "votes_delta": -374.0,
      "votes_change_rate_pct": -48.258065,
      "baseline_vote_share_pct_muni": 3.807044,
      "target_vote_share_pct_muni": 2.07514,
      "vote_share_delta_pct_pt": -1.731904
    },
    {
      "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": 201.0,
      "target_votes": 104.0,
      "votes_delta": -97.0,
      "votes_change_rate_pct": -48.258706,
      "baseline_vote_share_pct_muni": 3.092308,
      "target_vote_share_pct_muni": 1.549002,
      "vote_share_delta_pct_pt": -1.543306
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122335",
      "municipality_name": "富里市",
      "municipality_name_en": "Tomisato-shi",
      "baseline_votes": 928.0,
      "target_votes": 480.0,
      "votes_delta": -448.0,
      "votes_change_rate_pct": -48.275862,
      "baseline_vote_share_pct_muni": 4.575937,
      "target_vote_share_pct_muni": 2.571107,
      "vote_share_delta_pct_pt": -2.00483
    },
    {
      "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": 103.0,
      "target_votes": 53.0,
      "votes_delta": -50.0,
      "votes_change_rate_pct": -48.543689,
      "baseline_vote_share_pct_muni": 2.861111,
      "target_vote_share_pct_muni": 1.54564,
      "vote_share_delta_pct_pt": -1.315471
    },
    {
      "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": 1034.0,
      "target_votes": 531.0,
      "votes_delta": -503.0,
      "votes_change_rate_pct": -48.646035,
      "baseline_vote_share_pct_muni": 4.568147,
      "target_vote_share_pct_muni": 2.453336,
      "vote_share_delta_pct_pt": -2.114811
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "123226",
      "municipality_name": "酒々井町",
      "municipality_name_en": "Shisui-machi",
      "baseline_votes": 395.0,
      "target_votes": 202.0,
      "votes_delta": -193.0,
      "votes_change_rate_pct": -48.860759,
      "baseline_vote_share_pct_muni": 4.219184,
      "target_vote_share_pct_muni": 2.298589,
      "vote_share_delta_pct_pt": -1.920595
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122076",
      "municipality_name": "松戸市",
      "municipality_name_en": "Matsudo-shi",
      "baseline_votes": 11978.0,
      "target_votes": 6050.0,
      "votes_delta": -5928.0,
      "votes_change_rate_pct": -49.490733,
      "baseline_vote_share_pct_muni": 5.359236,
      "target_vote_share_pct_muni": 2.704733,
      "vote_share_delta_pct_pt": -2.654503
    },
    {
      "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": 685.0,
      "target_votes": 344.0,
      "votes_delta": -341.0,
      "votes_change_rate_pct": -49.781022,
      "baseline_vote_share_pct_muni": 3.834528,
      "target_vote_share_pct_muni": 1.862581,
      "vote_share_delta_pct_pt": -1.971947
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122246",
      "municipality_name": "鎌ケ谷市",
      "municipality_name_en": "Kamagaya-shi",
      "baseline_votes": 2484.0,
      "target_votes": 1241.0,
      "votes_delta": -1243.0,
      "votes_change_rate_pct": -50.040258,
      "baseline_vote_share_pct_muni": 4.991259,
      "target_vote_share_pct_muni": 2.53581,
      "vote_share_delta_pct_pt": -2.455449
    },
    {
      "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": 1139.0,
      "target_votes": 569.0,
      "votes_delta": -570.0,
      "votes_change_rate_pct": -50.043898,
      "baseline_vote_share_pct_muni": 3.885648,
      "target_vote_share_pct_muni": 1.995931,
      "vote_share_delta_pct_pt": -1.889717
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "121061",
      "municipality_name": "千葉市美浜区",
      "municipality_name_en": "Mihama-ku",
      "baseline_votes": 3758.0,
      "target_votes": 1875.0,
      "votes_delta": -1883.0,
      "votes_change_rate_pct": -50.10644,
      "baseline_vote_share_pct_muni": 4.886675,
      "target_vote_share_pct_muni": 2.511587,
      "vote_share_delta_pct_pt": -2.375088
    },
    {
      "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": 287.0,
      "target_votes": 143.0,
      "votes_delta": -144.0,
      "votes_change_rate_pct": -50.174216,
      "baseline_vote_share_pct_muni": 4.605263,
      "target_vote_share_pct_muni": 2.413502,
      "vote_share_delta_pct_pt": -2.191761
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
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      "jis_code": "122190",
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}
