Japanese Motorcycle Culture Timeline

Prompt

{"type":"Japanese infographic timeline poster","language":"Japanese","canvas":"landscape 4:3 educational chart with a clean white background, red grid lines, bold red title bar, small motorcycle illustrations, and dense Japanese annotations","headline":"{argument name=\"headline text\" default=\"④ 日本のバイクメーカー・名車と見た目系カスタム文化 年表\"}","subtitle":"名車・メーカーの主な出来事（上段）と、見た目のカスタム・ドレスアップ文化（下段）を年表で比較","layout":{"top_timeline":{"position":"upper two thirds","description":"matrix comparing 4 Japanese motorcycle manufacturers across 8 decade columns, with each cell showing a year, model name, and small detailed side-view motorcycle illustration","columns_count":8,"columns":["1950","1960","1970","1980","1990","2000","2010","2020"],"rows_count":4,"rows":[{"maker":"HONDA","logo_style":"red wing logo and HONDA text","entries_count":8,"entries":["1958 スーパーカブ C100","1969 モンキー Z50M","1971 CB400T ホークⅡ","1981 CBX400F","1992 モンキーR","2008 モンキー・カブの趣味性表現","2010 custom-style small bike illustration","2021 CT125 ハンターカブ"]},{"maker":"YAMAHA","logo_style":"blue tuning-fork circle logo and YAMAHA text","entries_count":7,"entries":["1968 メイト","1974 DT250","1980 XJ400","1983 RZ250 (4L3)","1995 マジェスティ125","2005 マジェスティ (SG20J)","2023 XSR125"]},{"maker":"SUZUKI","logo_style":"red S logo and SUZUKI text","entries_count":8,"entries":["1971 バンバン90","1976 GS400","1982 GSX400E","1985 RG250Γ","2000 スカイウェイブ（初代）","2017 SV650X","2023 GSX-S125","one empty/spacing decade cell to preserve grid alignment"]},{"maker":"Kawasaki","logo_style":"green Kawasaki mark and text","entries_count":8,"entries":["1969 500SS","1976 KH400","1981 Z400FX","1983 GPz400F","1998 W650","2003 エストレヤ","2022 250RS/250TR系（ネオクラ系譜）","one empty/spacing decade cell to preserve grid alignment"]}]},"bottom_culture_timeline":{"position":"lower third","section_title":"見た目系・ドレスアップ文化の流れ（下段）","description":"7 horizontal culture rows with pale colored category labels on the left and pink arrows showing approximate periods of popularity","rows_count":7,"rows":[{"label":"暴走族／族車文化","icon":"small aggressive motorcycle emblem","timeline":"1970s〜成立 → 1980s〜全盛 → 1990s〜減少へ → 2000s〜旧車會へ移行"},{"label":"旧車會文化","icon":"rising-sun style icon","timeline":"1980s後半〜旧車に暴走族風 → 1990s〜大規模集団走行が可視化 → 2000s〜イベント・ミーティング化"},{"label":"チョッパー／ボバー","icon":"chopper motorcycle silhouette","timeline":"1960s〜アメリカンスタイル流入 → 1970s〜チョッパー志向 → 1990s〜ボバー再評価 → 2000s〜カスタムの主流に"},{"label":"...