{
  "name": "TSUISO JP Drift Car Price Index",
  "url": "https://tsuisojapan.com/price-index/",
  "license": "https://creativecommons.org/licenses/by/4.0/",
  "attribution": "TSUISO JP Drift Car Price Index, https://tsuisojapan.com/price-index/",
  "method": "Median retail asking price (vehicle price, 万円) of every priced listing on goo-net.com for each chassis, counted in full each month (listings marked 応相談/price on request excluded). Index = simple average of each core chassis median relative to its 2026-07 median (=100). Chassis with fewer than 10 priced listings are excluded.",
  "coreModels": [
    "S13 Silvia",
    "S14 Silvia",
    "S15 Silvia",
    "180SX",
    "AE86 Trueno",
    "AE86 Levin",
    "JZX100 Chaser"
  ],
  "base": {
    "ym": "2026-07",
    "checked": "2026-07-21",
    "label": "July 2026"
  },
  "months": [
    {
      "checked": "2026-07-21",
      "ym": "2026-07",
      "label": "July 2026",
      "source": "goo-net.com 車両本体価格・全ページ全件（応相談除外）",
      "models": [
        {
          "model": "S13 Silvia",
          "short": "S13",
          "n": 58,
          "median": 379.9,
          "q1": 299.9,
          "q3": 446.8,
          "min": 219.8,
          "max": 999,
          "rel": 100,
          "mom": null,
          "excluded": false
        },
        {
          "model": "S14 Silvia",
          "short": "S14",
          "n": 63,
          "median": 286.4,
          "q1": 258,
          "q3": 339.8,
          "min": 148,
          "max": 455,
          "rel": 100,
          "mom": null,
          "excluded": false
        },
        {
          "model": "S15 Silvia",
          "short": "S15",
          "n": 137,
          "median": 359.8,
          "q1": 288,
          "q3": 454.5,
          "min": 144,
          "max": 1150,
          "rel": 100,
          "mom": null,
          "excluded": false
        },
        {
          "model": "180SX",
          "short": "180SX",
          "n": 86,
          "median": 360.6,
          "q1": 295.8,
          "q3": 401.6,
          "min": 178,
          "max": 700,
          "rel": 100,
          "mom": null,
          "excluded": false
        },
        {
          "model": "AE86 Trueno",
          "short": "AE86 Trueno",
          "n": 31,
          "median": 537,
          "q1": 371,
          "q3": 595,
          "min": 279,
          "max": 949,
          "rel": 100,
          "mom": null,
          "excluded": false
        },
        {
          "model": "AE86 Levin",
          "short": "AE86 Levin",
          "n": 37,
          "median": 338,
          "q1": 288.5,
          "q3": 468.4,
          "min": 188.9,
          "max": 695,
          "rel": 100,
          "mom": null,
          "excluded": false
        },
        {
          "model": "JZX100 Chaser",
          "short": "JZX100",
          "n": 68,
          "median": 418.5,
          "q1": 323.8,
          "q3": 473.1,
          "min": 139,
          "max": 650,
          "rel": 100,
          "mom": null,
          "excluded": false
        }
      ],
      "index": 100,
      "compositeMan": 382.88571428571424,
      "listings": 480,
      "modelsInIndex": 7,
      "indexMom": null,
      "listingsMom": null
    },
    {
      "checked": "2026-08-21",
      "ym": "2026-08",
      "label": "August 2026",
      "source": "goo-net.com 車両本体価格・全ページ全件（応相談除外）",
      "models": [
        {
          "model": "S13 Silvia",
          "short": "S13",
          "n": 48,
          "median": 379.9,
          "q1": 299.9,
          "q3": 469.4,
          "min": 248.8,
          "max": 999,
          "rel": 100,
          "mom": 0,
          "excluded": false
        },
        {
          "model": "S14 Silvia",
          "short": "S14",
          "n": 70,
          "median": 288.1,
          "q1": 249,
          "q3": 338,
          "min": 148,
          "max": 455,
          "rel": 100.59357541899443,
          "mom": 0.5935754189944298,
          "excluded": false
        },
        {
          "model": "S15 Silvia",
          "short": "S15",
          "n": 131,
          "median": 366.9,
          "q1": 288,
          "q3": 465,
          "min": 168,
          "max": 1150,
          "rel": 101.97331851028349,
          "mom": 1.9733185102834838,
          "excluded": false
        },
        {
          "model": "180SX",
          "short": "180SX",
          "n": 83,
          "median": 372,
          "q1": 319,
          "q3": 439.8,
          "min": 178,
          "max": 1367.2,
          "rel": 103.16139767054908,
          "mom": 3.161397670549082,
          "excluded": false
        },
        {
          "model": "AE86 Trueno",
          "short": "AE86 Trueno",
          "n": 29,
          "median": 539,
          "q1": 397.9,
          "q3": 606.5,
          "min": 279,
          "max": 949,
          "rel": 100.37243947858474,
          "mom": 0.3724394785847407,
          "excluded": false
        },
        {
          "model": "AE86 Levin",
          "short": "AE86 Levin",
          "n": 39,
          "median": 368.5,
          "q1": 299,
          "q3": 430,
          "min": 188.9,
          "max": 695,
          "rel": 109.02366863905326,
          "mom": 9.023668639053263,
          "excluded": false
        },
        {
          "model": "JZX100 Chaser",
          "short": "JZX100",
          "n": 66,
          "median": 435,
          "q1": 335,
          "q3": 479.2,
          "min": 160,
          "max": 650,
          "rel": 103.94265232974911,
          "mom": 3.942652329749108,
          "excluded": false
        }
      ],
      "index": 102.72386457817343,
      "compositeMan": 392.7714285714286,
      "listings": 466,
      "modelsInIndex": 7,
      "indexMom": 2.7238645781734405,
      "listingsMom": -14
    }
  ]
}