{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "9470",
  "company_name": "学研ホールディングス",
  "content_lang": "ja",
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  "updated": "2026-10-27",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/9470/executives/ceo/miyahara-hiroaki/",
  "source": {
    "person": {
      "primary": [
        "有価証券報告書（役員の状況）"
      ],
      "extraction": "EDINET の XBRL から機械抽出した役員表を土台に、雑誌記事・社史・報道で経歴と出自を補完",
      "caveat": "在任区間は career の is_ceo_appointed が正本。退任年月は次の代の就任年月から決まる"
    }
  },
  "person": {
    "slug": "miyahara-hiroaki",
    "name": "宮原博昭",
    "kana": "みやはら　ひろあき",
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            "role": "入社"
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        "company": "",
        "from": "2003-12",
        "to": null,
        "roles": [
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            "date": "2003-12",
            "role": "学研教室事業部長"
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          {
            "date": "2007-04",
            "role": "執行役員第四教育事業本部長、学研教室事業部長"
          },
          {
            "date": "2009-06",
            "role": "取締役"
          },
          {
            "date": "2010-12",
            "role": "代表取締役社長(現任)",
            "is_ceo_appointed": true
          },
          {
            "date": "2016-12",
            "role": "公益財団法人古岡奨学会 代表理事（現任）"
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        ]
      },
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        "from": "2021-06",
        "to": null,
        "roles": [
          {
            "date": "2021-06",
            "role": "社外取締役(現任）"
          },
          {
            "date": "2024-05",
            "role": "一般社団法人日本雑誌協会 理事長（現任）"
          }
        ]
      }
    ],
    "sections": {
      "tenure_summary": null,
      "management_policy": null,
      "initiatives": null,
      "evaluation": null,
      "notable": null
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