{
  "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": "REI",
    "party_label": "れいわ",
    "party_label_en": "Reiwa Shinsengumi",
    "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": -79.387457,
    "max_votes_change_rate_pct": -46.298227
  },
  "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": 191.8,
      "target_votes": 103.0,
      "votes_delta": -88.8,
      "votes_change_rate_pct": -46.298227,
      "baseline_vote_share_pct_muni": 5.77363,
      "target_vote_share_pct_muni": 2.932802,
      "vote_share_delta_pct_pt": -2.840828
    },
    {
      "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": 1031.0,
      "target_votes": 551.0,
      "votes_delta": -480.0,
      "votes_change_rate_pct": -46.556741,
      "baseline_vote_share_pct_muni": 7.359555,
      "target_vote_share_pct_muni": 3.393066,
      "vote_share_delta_pct_pt": -3.966489
    },
    {
      "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": 253.0,
      "target_votes": 134.0,
      "votes_delta": -119.0,
      "votes_change_rate_pct": -47.035573,
      "baseline_vote_share_pct_muni": 7.615894,
      "target_vote_share_pct_muni": 3.971547,
      "vote_share_delta_pct_pt": -3.644347
    },
    {
      "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": 1364.0,
      "target_votes": 672.0,
      "votes_delta": -692.0,
      "votes_change_rate_pct": -50.733138,
      "baseline_vote_share_pct_muni": 7.422725,
      "target_vote_share_pct_muni": 3.514828,
      "vote_share_delta_pct_pt": -3.907897
    },
    {
      "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": 560.0,
      "target_votes": 269.0,
      "votes_delta": -291.0,
      "votes_change_rate_pct": -51.964286,
      "baseline_vote_share_pct_muni": 9.380235,
      "target_vote_share_pct_muni": 4.620405,
      "vote_share_delta_pct_pt": -4.75983
    },
    {
      "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": 1049.0,
      "target_votes": 494.0,
      "votes_delta": -555.0,
      "votes_change_rate_pct": -52.907531,
      "baseline_vote_share_pct_muni": 6.756409,
      "target_vote_share_pct_muni": 3.056742,
      "vote_share_delta_pct_pt": -3.699667
    },
    {
      "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": 396.0,
      "target_votes": 185.0,
      "votes_delta": -211.0,
      "votes_change_rate_pct": -53.282828,
      "baseline_vote_share_pct_muni": 8.103131,
      "target_vote_share_pct_muni": 3.937008,
      "vote_share_delta_pct_pt": -4.166123
    },
    {
      "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": 913.942,
      "target_votes": 425.0,
      "votes_delta": -488.942,
      "votes_change_rate_pct": -53.498143,
      "baseline_vote_share_pct_muni": 6.704879,
      "target_vote_share_pct_muni": 3.059755,
      "vote_share_delta_pct_pt": -3.645124
    },
    {
      "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": 3862.0,
      "target_votes": 1736.0,
      "votes_delta": -2126.0,
      "votes_change_rate_pct": -55.049197,
      "baseline_vote_share_pct_muni": 5.970565,
      "target_vote_share_pct_muni": 2.721856,
      "vote_share_delta_pct_pt": -3.248709
    },
    {
      "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": 675.0,
      "target_votes": 303.0,
      "votes_delta": -372.0,
      "votes_change_rate_pct": -55.111111,
      "baseline_vote_share_pct_muni": 6.73989,
      "target_vote_share_pct_muni": 3.110244,
      "vote_share_delta_pct_pt": -3.629646
    },
    {
      "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": 304.0,
      "target_votes": 136.0,
      "votes_delta": -168.0,
      "votes_change_rate_pct": -55.263158,
      "baseline_vote_share_pct_muni": 7.900208,
      "target_vote_share_pct_muni": 3.472045,
      "vote_share_delta_pct_pt": -4.428163
    },
    {
      "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": 263.0,
      "target_votes": 117.0,
      "votes_delta": -146.0,
      "votes_change_rate_pct": -55.513308,
      "baseline_vote_share_pct_muni": 7.931242,
      "target_vote_share_pct_muni": 3.629032,
      "vote_share_delta_pct_pt": -4.30221
    },
    {
      "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": 484.0,
      "target_votes": 210.0,
      "votes_delta": -274.0,
      "votes_change_rate_pct": -56.61157,
      "baseline_vote_share_pct_muni": 7.446154,
      "target_vote_share_pct_muni": 3.127793,
      "vote_share_delta_pct_pt": -4.318361
    },
    {
      "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": 1267.967,
      "target_votes": 550.0,
      "votes_delta": -717.967,
      "votes_change_rate_pct": -56.623477,
      "baseline_vote_share_pct_muni": 7.09789,
      "target_vote_share_pct_muni": 2.977963,
      "vote_share_delta_pct_pt": -4.119927
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    {
      "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": 13926.954,
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      "votes_change_rate_pct": -56.975517,
      "baseline_vote_share_pct_muni": 6.231244,
      "target_vote_share_pct_muni": 2.678803,
      "vote_share_delta_pct_pt": -3.552441
    },
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      "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": 510.428,
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      "baseline_vote_share_pct_muni": 8.443805,
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      "vote_share_delta_pct_pt": -4.75826
    },
    {
      "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": 4250.0,
      "target_votes": 1775.0,
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      "baseline_vote_share_pct_muni": 5.526442,
      "target_vote_share_pct_muni": 2.377635,
      "vote_share_delta_pct_pt": -3.148807
    },
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      "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",
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      "target_votes": 139.0,
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      "target_vote_share_pct_muni": 2.59522,
      "vote_share_delta_pct_pt": -3.396144
    },
    {
      "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",
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      "votes_change_rate_pct": -58.459766,
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      "vote_share_delta_pct_pt": -3.646592
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      "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",
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      "vote_share_delta_pct_pt": -5.245024
    },
    {
      "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": 281.0,
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      "baseline_vote_share_pct_muni": 7.805556,
      "target_vote_share_pct_muni": 3.38291,
      "vote_share_delta_pct_pt": -4.422646
    },
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      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122203",
      "municipality_name": "流山市",
      "municipality_name_en": "Nagareyama-shi",
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      "target_votes": 2349.0,
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      "vote_share_delta_pct_pt": -3.200342
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "121037",
      "municipality_name": "千葉市稲毛区",
      "municipality_name_en": "Inage-ku",
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      "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",
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      "votes_change_rate_pct": -59.448819,
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      "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",
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      "vote_share_delta_pct_pt": -4.098764
    },
    {
      "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": 2597.0,
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      "baseline_vote_share_pct_muni": 7.06436,
      "target_vote_share_pct_muni": 2.949446,
      "vote_share_delta_pct_pt": -4.114914
    },
    {
      "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": 213.0,
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      "target_vote_share_pct_muni": 3.154806,
      "vote_share_delta_pct_pt": -4.465945
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122165",
      "municipality_name": "習志野市",
      "municipality_name_en": "Narashino-shi",
      "baseline_votes": 4613.0,
      "target_votes": 1845.0,
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      "votes_change_rate_pct": -60.004336,
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      "vote_share_delta_pct_pt": -3.056224
    },
    {
      "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": 1900.972,
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      "votes_delta": -1142.972,
      "votes_change_rate_pct": -60.125662,
      "baseline_vote_share_pct_muni": 8.398374,
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      "vote_share_delta_pct_pt": -4.896249
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "122173",
      "municipality_name": "柏市",
      "municipality_name_en": "Kashiwa-shi",
      "baseline_votes": 12477.882,
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      "votes_delta": -7510.882,
      "votes_change_rate_pct": -60.193565,
      "baseline_vote_share_pct_muni": 6.128325,
      "target_vote_share_pct_muni": 2.522011,
      "vote_share_delta_pct_pt": -3.606314
    },
    {
      "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": 1516.0,
      "target_votes": 603.0,
      "votes_delta": -913.0,
      "votes_change_rate_pct": -60.224274,
      "baseline_vote_share_pct_muni": 6.837761,
      "target_vote_share_pct_muni": 2.764026,
      "vote_share_delta_pct_pt": -4.073735
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "121029",
      "municipality_name": "千葉市花見川区",
      "municipality_name_en": "Hanamigawa-ku",
      "baseline_votes": 4958.938,
      "target_votes": 1972.0,
      "votes_delta": -2986.938,
      "votes_change_rate_pct": -60.233421,
      "baseline_vote_share_pct_muni": 6.035341,
      "target_vote_share_pct_muni": 2.612786,
      "vote_share_delta_pct_pt": -3.422555
    },
    {
      "prefecture_code": "12",
      "prefecture_name": "千葉県",
      "prefecture_name_en": "Chiba",
      "jis_code": "121010",
      "municipality_name": "千葉市中央区",
      "municipality_name_en": "Chuo-ku",
      "baseline_votes": 6020.0,
      "target_votes": 2364.0,
      "votes_delta": -3656.0,
      "votes_change_rate_pct": -60.730897,
      "baseline_vote_share_pct_muni": 6.150325,
      "target_vote_share_pct_muni": 2.553798,
      "vote_share_delta_pct_pt": -3.596527
    },
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}
