{
  "country": "JP",
  "generated": "2026-09-24 10:31",
  "indicator": {
    "id": "vuln_power_01",
    "chapter": "power",
    "name": "広域予備率が警戒水準を下回った日数",
    "short_name": "予備率の警戒日数",
    "unit": "日",
    "definition_version": "1.0",
    "definition_fixed_on": "2026-08-22",
    "definition_doc": "docs/指標定義_脆弱性01_電力予備率警戒日数.md",
    "aggregation": "暦月（JST）。その日に公表された広域予備率（30分×48コマ×全ブロック）の最小値が閾値を下回った日を1日と数える",
    "means": "同じ出来事が起きたときに、どれだけ余力が薄い状態だったかの記録（脆弱性＝もろさ）",
    "not_means": "停電の予測ではない。また実需給断面の公表値に基づくため、前日16時時点の見通しで判断される需給ひっ迫注意報・警報の発令実績とは一致しない"
  },
  "thresholds": [
    {
      "key": "lt8",
      "value": 8,
      "label": "8%未満",
      "basis": "OCCTO 供給力提供（準備）通知の発動水準"
    },
    {
      "key": "lt5",
      "value": 5,
      "label": "5%未満",
      "basis": "需給ひっ迫準備情報（前々日）／注意報の上限"
    },
    {
      "key": "lt3",
      "value": 3,
      "label": "3%未満",
      "basis": "需給ひっ迫警報の水準（安定供給に最低限必要）"
    }
  ],
  "source": {
    "name": "電力広域的運営推進機関「広域予備率Web公表システム」",
    "url": "https://web-kohyo.occto.or.jp/kks-web-public/",
    "license": "出所明示で自由利用（https://www.occto.or.jp/chosakuken.html）",
    "coverage": "2025-04-01 〜 2026-09-24（542日・欠測なし）",
    "script": "ai-lifeline/scripts/build_vulnerability.ps1（遡及取得は backfill_reserve_history.ps1）"
  },
  "current_month": {
    "month": "2026-09",
    "observed_days": 24,
    "days_in_month": 30,
    "days_lt8": 2,
    "days_lt5": 0,
    "days_lt3": 0,
    "month_min": 7.02,
    "month_min_date": "2026-09-18",
    "month_min_time": "05:30",
    "month_min_areas": "中部",
    "tokyo_days_lt8": 0,
    "tokyo_days_lt5": 0,
    "tokyo_days_lt3": 0
  },
  "previous_month": {
    "month": "2026-08",
    "observed_days": 31,
    "days_in_month": 31,
    "days_lt8": 7,
    "days_lt5": 0,
    "days_lt3": 0,
    "month_min": 5.57,
    "month_min_date": "2026-08-26",
    "month_min_time": "18:00",
    "month_min_areas": "中部・北陸・関西・中国・四国・九州",
    "tokyo_days_lt8": 0,
    "tokyo_days_lt5": 0,
    "tokyo_days_lt3": 0
  },
  "current_is_partial": true,
  "change_vs_previous": {
    "days_lt8": -5,
    "days_lt5": 0,
    "days_lt3": 0
  },
  "change_note": "当月は 24/30 日時点の途中集計。前月（31日）とは分母が異なる",
  "monthly": [
    {
      "month": "2025-04",
      "observed_days": 30,
      "days_in_month": 30,
      "days_lt8": 0,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 9.5,
      "month_min_date": "2025-04-25",
      "month_min_time": "08:30",
      "month_min_areas": "東北・東京",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-05",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 1,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 6.37,
      "month_min_date": "2025-05-15",
      "month_min_time": "13:30",
      "month_min_areas": "東京",
      "tokyo_days_lt8": 1,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-06",
      "observed_days": 30,
      "days_in_month": 30,
      "days_lt8": 2,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 7.11,
      "month_min_date": "2025-06-18",
      "month_min_time": "10:00",
      "month_min_areas": "東京",
      "tokyo_days_lt8": 2,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-07",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 0,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 8.17,
      "month_min_date": "2025-07-15",
      "month_min_time": "08:00",
      "month_min_areas": "東京",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-08",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 2,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 7.05,
      "month_min_date": "2025-08-05",
      "month_min_time": "17:00",
      "month_min_areas": "東京・中部・北陸・関西",
      "tokyo_days_lt8": 2,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-09",
      "observed_days": 30,
      "days_in_month": 30,
      "days_lt8": 10,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 5.21,
      "month_min_date": "2025-09-08",
      "month_min_time": "17:00",
      "month_min_areas": "東京",
      "tokyo_days_lt8": 7,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-10",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 2,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 5.31,
      "month_min_date": "2025-10-14",
      "month_min_time": "16:30",
      "month_min_areas": "九州",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-11",
      "observed_days": 30,
      "days_in_month": 30,
      "days_lt8": 1,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 6.93,
      "month_min_date": "2025-11-05",
      "month_min_time": "11:00",
      "month_min_areas": "東京・中部",
      "tokyo_days_lt8": 1,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2025-12",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 5,
      "days_lt5": 2,
      "days_lt3": 1,
      "month_min": 0.9,
      "month_min_date": "2025-12-05",
      "month_min_time": "11:00",
      "month_min_areas": "北陸",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-01",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 2,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 7.76,
      "month_min_date": "2026-01-10",
      "month_min_time": "12:30",
      "month_min_areas": "北海道",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-02",
      "observed_days": 28,
      "days_in_month": 28,
      "days_lt8": 2,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 5.18,
      "month_min_date": "2026-02-24",
      "month_min_time": "05:00",
      "month_min_areas": "北陸",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-03",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 4,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 6.68,
      "month_min_date": "2026-03-20",
      "month_min_time": "18:00",
      "month_min_areas": "東京",
      "tokyo_days_lt8": 1,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-04",
      "observed_days": 30,
      "days_in_month": 30,
      "days_lt8": 3,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 5.01,
      "month_min_date": "2026-04-29",
      "month_min_time": "19:00",
      "month_min_areas": "北海道",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-05",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 6,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 5.76,
      "month_min_date": "2026-05-28",
      "month_min_time": "16:30",
      "month_min_areas": "東北・東京",
      "tokyo_days_lt8": 4,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-06",
      "observed_days": 30,
      "days_in_month": 30,
      "days_lt8": 6,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 5.85,
      "month_min_date": "2026-06-23",
      "month_min_time": "15:00",
      "month_min_areas": "北海道",
      "tokyo_days_lt8": 4,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-07",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 8,
      "days_lt5": 2,
      "days_lt3": 1,
      "month_min": 2.54,
      "month_min_date": "2026-07-22",
      "month_min_time": "17:00",
      "month_min_areas": "東京",
      "tokyo_days_lt8": 8,
      "tokyo_days_lt5": 2,
      "tokyo_days_lt3": 1
    },
    {
      "month": "2026-08",
      "observed_days": 31,
      "days_in_month": 31,
      "days_lt8": 7,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 5.57,
      "month_min_date": "2026-08-26",
      "month_min_time": "18:00",
      "month_min_areas": "中部・北陸・関西・中国・四国・九州",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    },
    {
      "month": "2026-09",
      "observed_days": 24,
      "days_in_month": 30,
      "days_lt8": 2,
      "days_lt5": 0,
      "days_lt3": 0,
      "month_min": 7.02,
      "month_min_date": "2026-09-18",
      "month_min_time": "05:30",
      "month_min_areas": "中部",
      "tokyo_days_lt8": 0,
      "tokyo_days_lt5": 0,
      "tokyo_days_lt3": 0
    }
  ],
  "value_status_note": "value_status=final は観測日より後に取得した確定値、provisional は観測日と同じ日に取得した暫定値（12:30以降が見通し値を含む）。暫定値は翌日以降の再取得で確定値へ差し替わる",
  "daily_min_recent": [
    {
      "date": "2026-07-27",
      "national_min": 10.63,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "18:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-07-28",
      "national_min": 11.07,
      "block": "1",
      "areas": "北海道・東北・東京・中部・北陸・関西",
      "time": "15:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-07-29",
      "national_min": 12.11,
      "block": "2",
      "areas": "東京・中部・北陸・関西・中国",
      "time": "13:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-07-30",
      "national_min": 8.06,
      "block": "2",
      "areas": "東京・中部・北陸・関西・中国・四国・九州",
      "time": "18:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-07-31",
      "national_min": 10.99,
      "block": "2",
      "areas": "東京・中部・北陸・関西",
      "time": "09:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-01",
      "national_min": 10.32,
      "block": "2",
      "areas": "東京・中部・北陸・関西・中国・九州",
      "time": "18:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-02",
      "national_min": 9.27,
      "block": "3",
      "areas": "東京",
      "time": "10:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-03",
      "national_min": 6.58,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "18:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-04",
      "national_min": 9.74,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "18:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-05",
      "national_min": 8.32,
      "block": "4",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "00:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-06",
      "national_min": 7.59,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "19:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-07",
      "national_min": 8.79,
      "block": "1",
      "areas": "北海道・東北・東京・中部・北陸・関西",
      "time": "16:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-08",
      "national_min": 10.17,
      "block": "3",
      "areas": "東京・中部・北陸・関西・中国・四国・九州",
      "time": "01:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-09",
      "national_min": 11.64,
      "block": "3",
      "areas": "東京",
      "time": "14:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-10",
      "national_min": 9.54,
      "block": "3",
      "areas": "東京・中部・北陸・関西",
      "time": "11:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-11",
      "national_min": 12.65,
      "block": "3",
      "areas": "東京・中部",
      "time": "00:30",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-12",
      "national_min": 11.05,
      "block": "1",
      "areas": "北海道",
      "time": "17:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-13",
      "national_min": 10.04,
      "block": "1",
      "areas": "北海道",
      "time": "16:00",
      "value_status": "final",
      "fetched_at": ""
    },
    {
      "date": "2026-08-14",
      "national_min": 12.46,
      "block": "3",
      "areas": "中部・北陸・関西・中国・九州",
      "time": "19:30",
      "value_status": "final",
      "fetched_at": "2026-08-23 11:19"
    },
    {
      "date": "2026-08-15",
      "national_min": 10.46,
      "block": "2",
      "areas": "東京・中部・北陸・関西・中国・四国・九州",
      "time": "00:30",
      "value_status": "final",
      "fetched_at": "2026-08-23 11:19"
    },
    {
      "date": "2026-08-16",
      "national_min": 15.31,
      "block": "2",
      "areas": "東京・中部・北陸・関西・中国・四国・九州",
      "time": "00:30",
      "value_status": "final",
      "fetched_at": "2026-08-23 11:19"
    },
    {
      "date": "2026-08-17",
      "national_min": 8.58,
      "block": "2",
      "areas": "東京・中部・北陸・関西",
      "time": "14:30",
      "value_status": "final",
      "fetched_at": "2026-08-23 11:19"
    },
    {
      "date": "2026-08-18",
      "national_min": 8.9,
      "block": "3",
      "areas": "東京・中部・北陸",
      "time": "12:00",
      "value_status": "final",
      "fetched_at": "2026-08-23 11:19"
    },
    {
      "date": "2026-08-19",
      "national_min": 9.64,
      "block": "4",
      "areas": "中部・北陸・関西",
      "time": "10:00",
      "value_status": "final",
      "fetched_at": "2026-08-23 11:19"
    },
    {
      "date": "2026-08-20",
      "national_min": 6.65,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "18:30",
      "value_status": "final",
      "fetched_at": "2026-08-23 14:55"
    },
    {
      "date": "2026-08-21",
      "national_min": 8.87,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "16:30",
      "value_status": "final",
      "fetched_at": "2026-08-24 11:00"
    },
    {
      "date": "2026-08-22",
      "national_min": 9.5,
      "block": "1",
      "areas": "北海道",
      "time": "20:30",
      "value_status": "final",
      "fetched_at": "2026-08-25 11:00"
    },
    {
      "date": "2026-08-23",
      "national_min": 12.08,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "18:30",
      "value_status": "final",
      "fetched_at": "2026-08-26 11:00"
    },
    {
      "date": "2026-08-24",
      "national_min": 6.83,
      "block": "1",
      "areas": "北海道",
      "time": "15:00",
      "value_status": "final",
      "fetched_at": "2026-08-27 11:00"
    },
    {
      "date": "2026-08-25",
      "national_min": 6.83,
      "block": "3",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "18:00",
      "value_status": "final",
      "fetched_at": "2026-08-28 11:00"
    },
    {
      "date": "2026-08-26",
      "national_min": 5.57,
      "block": "2",
      "areas": "中部・北陸・関西・中国・四国・九州",
      "time": "18:00",
      "value_status": "final",
      "fetched_at": "2026-08-29 11:59"
    },
    {
      "date": "2026-08-27",
      "national_min": 5.92,
      "block": "2",
      "areas": "中部・北陸・関西",
      "time": "11:30",
      "value_status": "final",
      "fetched_at": "2026-08-30 11:00"
    },
    {
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