{
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  "company_name": "グリーホールディングス",
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  "updated": "2026-08-29",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/3632/",
  "source": {
    "primary": [
      "有価証券報告書",
      "公式サイト沿革"
    ],
    "extraction": "有価証券報告書の沿革を基礎に、社史・報道で補完",
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      "date": "2004/2",
      "importance": 2,
      "event": "田中良和氏が個人サイト「GREE」を公開",
      "source": "公式サイト沿革"
    },
    {
      "date": "2004/12",
      "importance": 2,
      "event": "グリーを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2005/6",
      "importance": 3,
      "event": "フィーチャーフォン向けSNSの提供を開始",
      "source": "公式サイト沿革"
    },
    {
      "date": "2006/7",
      "importance": 2,
      "event": "KDDIと資本業務提携",
      "source": "公式サイト沿革"
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    {
      "date": "2006/11",
      "importance": 2,
      "event": "au向けSNS「EZ GREE」の提供を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/2",
      "importance": 2,
      "event": "モバイル版「GREE」が「iモード」の公式サービスに採用",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/4",
      "importance": 2,
      "event": "「EZ GREE」で有料課金サービスを開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/5",
      "importance": 3,
      "event": "モバイルソーシャルゲーム「釣り★スタ」を公開",
      "source": "公式サイト沿革"
    },
    {
      "date": "2007/8",
      "importance": 1,
      "event": "モバイル版「GREE」が「Yahoo!ケータイ」の公式サービスに採用",
      "source": "有価証券報告書"
    },
    {
      "date": "2008/12",
      "importance": 1,
      "event": "東京証券取引所マザーズに上場",
      "source": "有価証券報告書"
    },
    {
      "date": "2010/6",
      "importance": 1,
      "event": "東京証券取引所市場第一部に指定替え",
      "source": "有価証券報告書"
    },
    {
      "date": "2010/6",
      "importance": 3,
      "event": "「GREE Platform」の提供を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2010/7",
      "importance": 1,
      "event": "本社を移転",
      "source": "有価証券報告書"
    },
    {
      "date": "2010/12",
      "importance": 2,
      "event": "「GREE Platform for Smartphone」の提供を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/1",
      "importance": 2,
      "event": "GREE International, Inc.を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/1",
      "importance": 1,
      "event": "アトランティスを子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/4",
      "importance": 2,
      "event": "OpenFeint Inc.を子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/5",
      "importance": 3,
      "event": "コンプリートガチャを廃止",
      "source": null
    },
    {
      "date": "2012/10",
      "importance": 2,
      "event": "ポケラボを子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2014/2",
      "importance": 2,
      "event": "Wright Flyer Studiosを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/5",
      "importance": 2,
      "event": "OpenFeint Inc.を清算",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/10",
      "importance": 1,
      "event": "ファンプレックスを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2016/8",
      "importance": 1,
      "event": "GREE International Entertainment, Inc.を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2017/2",
      "importance": 1,
      "event": "３ミニッツを子会社化",
      "source": "公式サイト沿革"
    },
    {
      "date": "2018/4",
      "importance": 1,
      "event": "Wright Flyer Live Entertainmentを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/5",
      "importance": 1,
      "event": "GREE International Entertainment, Inc.を清算",
      "source": "有価証券報告書"
    },
    {
      "date": "2018/8",
      "importance": 2,
      "event": "配信基盤「REALITY」の提供を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2020/7",
      "importance": 1,
      "event": "Wright Flyer Studios事業をWFSに吸収分割",
      "source": "有価証券報告書"
    },
    {
      "date": "2020/9",
      "importance": 1,
      "event": "監査等委員会設置会社に移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2021/7",
      "importance": 1,
      "event": "ファンプレックスをグリーエンターテインメントに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "プライム市場に移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2022/6",
      "importance": 2,
      "event": "DX事業に参入",
      "source": "公式サイト沿革"
    },
    {
      "date": "2022/9",
      "importance": 2,
      "event": "Web3事業に参入",
      "source": "公式サイト沿革"
    },
    {
      "date": "2023/1",
      "importance": 1,
      "event": "REALITY Studiosを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2023/9",
      "importance": 2,
      "event": "セコイアが株式交付により親会社に該当",
      "source": "有価証券報告書"
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      "date": "2024/8",
      "importance": 2,
      "event": "グリーを設立",
      "source": "公式サイト沿革"
    },
    {
      "date": "2025/1",
      "importance": 3,
      "event": "持株会社体制に移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/1",
      "importance": 2,
      "event": "グリーホールディングスに商号変更",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/1",
      "importance": 2,
      "event": "GREE Platform事業をグリーに吸収分割",
      "source": "有価証券報告書"
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}