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{
  "type": "Japanese motorcycle history infographic timeline",
  "language": "Japanese",
  "canvas": "4:3 landscape poster, clean editorial infographic, crisp vector layout mixed with realistic side-view cutout motorcycle illustrations with soft cast shadows, white background, deep forest green header bars, fine grid lines, high legibility",
  "headline": "[③ 日本のバイクメーカー・名車と走り系カスタム・レース文化 年表]",
  "subtitle": "名車・メーカーの主な出来事（上段）と、走りの文化・競技系カスタム（下段）を年表で比較",
  "main_timeline": {
    "position": "left and center, upper two thirds",
    "structure": "decade grid columns and manufacturer rows",
    "decade_columns": [
      "1950",
      "1960",
      "1970",
      "1980",
      "1990",
      "2000",
      "2010",
      "2020"
    ],
    "manufacturer_rows": [
      {
        "maker": "HONDA",
        "logo_style": "red wing logo and HONDA wordmark",
        "entries": [
          "1958 ドリーム C100",
          "1969 CB750 Four",
          "1982 CBX400F",
          "1992 CBR900RR (FireBlade)",
          "2000 VTR1000SP",
          "2021 CBR1000RR-R"
        ]
      },
      {
        "maker": "YAMAHA",
        "logo_style": "blue tuning fork emblem and YAMAHA wordmark",
        "entries": [
          "1965 YA-1",
          "1973 TX750",
          "1980 RZ250",
          "1985 RZV500R",
          "1990 FZR250R",
          "1998 YZF-R1",
          "2021 YZF-R1M"
        ]
      },
      {
        "maker": "SUZUKI",
        "logo_style": "red S emblem and blue SUZUKI wordmark",
        "entries": [
          "1957 コレダ ST-1",
          "1972 GT750",
          "1981 GSX400E",
          "1983 RG250Γ",
          "1985 GSX-R750",
          "1999 Hayabusa (GSX1300R)",
          "2021 Hayabusa"
        ]
      },
      {
        "maker": "Kawasaki",
        "logo_style": "green Kawasaki K emblem and wordmark",
        "entries": [
          "1960 メグロ K3",
          "1972 900SUPER4 / Z1",
          "1975 750RS (Z2)",
          "1984 Z400FX",
          "1990 ZZR1100",
          "2024 Ninja ZX-10R"
        ]
      }
    ],
    "visuals": "each entry contains a small, realistically rendered side-view motorcycle cutout scaled proportionally, with release year above and model designation below, centered in light gray grid cells"
  },
  "right_sidebar": {
    "title": "豆知識・雑学",
    "position": "right vertical column panel",
    "items": [
      "CB750は1969年8月発売。",
      "CB750は量産4気筒の象徴。",
      "Z1は1972年の輸出名車。",
      "RZ250はレプリカ前夜の名車。",
      "RZは『ナナハンキラー』。",
      "NSR250Rは1986年発売。",
      "鈴鹿初レースは二輪だった。",
      "2スト250は峠文化と好相性。"
    ],
    "icons": "small green bullet points, miniature bike outlines, technical engine drawing, Z1 badge, checkered racing flags, race track map, mountain icon"
  },
  "culture_timeline": {
    "title": "走り系・レース系カスタム／文化の流れ（下段）",
    "position": "bottom third",
    "rows": [
      {
        "label": "ロードレース／GP",
        "icon": "checkered flag",
        "flow": [
          "1960s〜 全日本ロードレース開始",
          "1970s〜 国際レース志向",
          "1980s〜 日本人ライダー台頭",
          "1990s〜 WGP 250/500",
          "2010s〜 MotoGP継続"
        ]
      },
      {
        "label": "2ストレプリカ",
        "icon": "helmet",
        "flow": [
          "1980s前半〜 NSR・RZ・RGなど人気化",
          "1990s〜 90年代を象徴",
          "2000s〜 4スト化で減少"
        ]
      },
      {
        "label": "峠／ワインディング",
        "icon": "mountain road",
        "flow": [
          "1970s〜 峠ブーム・チーム文化",
          "1980s〜 軽量2スト",
          "1990s〜 走り屋文化",
          "2000s〜 スポーツツーリングへ"
        ]
      },
      {
        "label": "ミニバイクレース",
        "icon": "small motorcycle",
        "flow": [
          "1980s〜 ミニバイク増加",
          "1990s〜 NSR50など人気",
          "2000s〜 レース人口増",
          "2010s〜 4ミニカスタム化"
        ]
      },
      {
        "label": "カフェレーサー／ネイキッド",
        "icon": "coffee cup",
        "flow": [
          "1960s〜 カフェレーサースタイル",
          "1980s〜 ネイキッド人気上昇",
          "1990s〜 ネイキッドブーム",
          "2010s〜 ストリートファイターへ"
        ]
      },
      {
        "label": "サーキット走行会／タイムアタック",
        "icon": "stopwatch",
        "flow": [
          "1990s〜 走行会増加",
          "2000s〜 タイムアタック",
          "2010s〜 走行会・走る場所の多様化"
        ]
      }
    ]
  },
  "legend": {
    "position": "bottom edge",
    "items": [
      "■ = 名車・出来事（上段）",
      "■ = 文化・カスタムの広がり（おおよその期間）（下段）"
    ],
    "footnote": "※年表は主な出来事・傾向を中心に編集。文化・カスタムの期間はおおよその目安です。"
  },
  "style_parameters": {
    "primary_color": "[deep forest green]",
    "accent_colors": "[Honda red, Yamaha blue, Suzuki red and blue, Kawasaki lime green]",
    "illustration_style": "[realistic side-view cutout illustrations with light shadow]",
    "density": "dense editorial textbook layout, precise vector lines, sharp Japanese typography"
  }
}