{
  "query": {
    "country": "JP",
    "market": "day-ahead",
    "lookback_days": 7
  },
  "status": "ok",
  "price": {
    "currency": "JPY",
    "unit": "per kWh",
    "value": 29.29,
    "measure": "median",
    "median": 29.29,
    "typical_low": 10.61,
    "typical_high": 35.87,
    "min": 9.98,
    "max": 38.37
  },
  "sample_size": 48,
  "period": {
    "from": "2026-10-29",
    "to": "2026-10-29"
  },
  "confidence": "medium",
  "price_type": "transaction",
  "as_of": "2026-10-30T13:16:02.990Z",
  "source": {
    "id": "jp-jepx-spot",
    "name": "JEPX day-ahead spot market price",
    "publisher": "Japan Electric Power Exchange (JEPX)",
    "licence": "JEPX 'Disclaimer and copyright' page: copyright in the site content belongs to JEPX and 'when you use it, state the source' (当ウェブサイトに掲載されている内容に関する著作権は本所にあります。利用する場合は、出所を明示した上でご利用下さい。). No named open licence and no commercial wording, so this source is served free of charge only.",
    "licence_url": "https://www.jepx.jp/disclaimer/",
    "attribution": "出所：一般社団法人日本卸電力取引所（JEPX） / Source: Japan Electric Power Exchange (JEPX), day-ahead spot market results, https://www.jepx.jp. Medians, ranges and counts are own calculations by ProofPrice from the published prices; JEPX is not responsible for them.",
    "url": "https://www.jepx.jp"
  },
  "method": "Japan wholesale power: the median and 10th-90th percentile of the 48 half-hourly day-ahead spot market prices (nationwide system price, yen per kWh) for the newest complete delivery day (Japan time) that ProofPrice holds, from the JEPX spot results file, which we copy once a day. Each half-hour counts as one record. extra.daily lists the daily medians of the recent days we hold and extra.areas the nine area prices of the same day. Exchange prices, not household bills. Negative prices cannot occur on JEPX.",
  "method_url": "https://proofprice.com/method",
  "summary": "Wholesale day-ahead electricity in Japan on 2026-10-29: median 29.29 yen/kWh, typical half-hours between 10.61 and 35.87 yen/kWh (system price). Not a household price. Based on 48 records from Japan Electric Power Exchange (JEPX) (2026-10-29 to 2026-10-29). Confidence: medium.",
  "notice": "Information, not a valuation or offer. Ranges describe past recorded prices.",
  "extra": {
    "delivery_day": "2026-10-29",
    "cheapest_half_hour_jpy_per_kwh": 9.98,
    "dearest_half_hour_jpy_per_kwh": 38.37,
    "areas": [
      {
        "area": "Hokkaido",
        "median_jpy_per_kwh": 25.92,
        "low": 10.33,
        "high": 38.86
      },
      {
        "area": "Tohoku",
        "median_jpy_per_kwh": 29.71,
        "low": 9.01,
        "high": 38.86
      },
      {
        "area": "Tokyo",
        "median_jpy_per_kwh": 29.8,
        "low": 28.77,
        "high": 38.86
      },
      {
        "area": "Chubu",
        "median_jpy_per_kwh": 29.8,
        "low": 14.84,
        "high": 38.86
      },
      {
        "area": "Hokuriku",
        "median_jpy_per_kwh": 24.02,
        "low": 14.84,
        "high": 38.37
      },
      {
        "area": "Kansai",
        "median_jpy_per_kwh": 24.02,
        "low": 14.84,
        "high": 38.37
      },
      {
        "area": "Chugoku",
        "median_jpy_per_kwh": 21.94,
        "low": 9.81,
        "high": 29.03
      },
      {
        "area": "Shikoku",
        "median_jpy_per_kwh": 13.07,
        "low": 8.38,
        "high": 29.03
      },
      {
        "area": "Kyushu",
        "median_jpy_per_kwh": 21.94,
        "low": 9.81,
        "high": 29.03
      }
    ],
    "daily": [
      {
        "date": "2026-10-28",
        "median_jpy_per_kwh": 26.64,
        "low": 9.93,
        "high": 31.94,
        "min": 3.01,
        "max": 35.48
      },
      {
        "date": "2026-10-29",
        "median_jpy_per_kwh": 29.29,
        "low": 10.61,
        "high": 35.87,
        "min": 9.98,
        "max": 38.37
      }
    ],
    "days_held_in_window": 2,
    "basis": "Day-ahead spot market clearing price per half-hour; household bills add grid fees, levies, taxes and margin. Free tier only (JEPX gives no commercial licence)."
  },
  "answer_id": "ans_fd6cbaaa6eb16696480c",
  "method_version": "1",
  "retrieved_at": "2026-10-30T13:16:02.990Z",
  "evidence": {
    "type": "transaction",
    "label": "Recorded sale prices",
    "meaning": "Prices recorded in official records of completed sales: they show what others paid, not what a particular item is worth or what is on offer now."
  },
  "reliability": "record_level",
  "data_as_of": "2026-10-29",
  "data_age_days": 1,
  "suggestions": []
}