{
  "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",
  "point_grain": "prefecture",
  "selector": {
    "prefecture_code": "",
    "prefecture_name": "全国",
    "prefecture_name_en": "National",
    "party_id": "LDP",
    "party_label": "自民",
    "party_label_en": "Liberal Democratic Party",
    "scope": "nationwide",
    "ranking_id": "",
    "ranking_label": "",
    "ranking_label_en": ""
  },
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    "baseline_election_set_key": "20250720_hc",
    "baseline_election_date": "2025-07-20",
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    "target_vote_system": "block"
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    "secondary_metric_id": "votes_delta",
    "secondary_metric_label": "票数差"
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