{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "4471",
  "company_name": "三洋化成工業",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4471/executives/ceo/harada-masahiro/",
  "api_url": "/api/4471/ceo/harada-masahiro.json",
  "updated": "2026-10-26",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4471/executives/ceo/harada-masahiro/",
  "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": "harada-masahiro",
    "name": "原田正大",
    "kana": "はらだ　まさひろ",
    "surname": "原田",
    "given_name": "正大",
    "hometown": null,
    "education": null,
    "prev_role": null,
    "career": [
      {
        "company": "三洋化成工業",
        "from": "1989-04",
        "to": null,
        "roles": [
          {
            "date": "1989-04",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "2010-07",
            "role": "第二輸送機・フォーム産業部長",
            "dept": "第二輸送機・フォーム産業部長"
          },
          {
            "date": "2017-04",
            "role": "電子・樹脂・色材本部長",
            "dept": "電子・樹脂・色材本部長"
          },
          {
            "date": "2018-06",
            "role": "執行役員電子・樹脂・色材本部長",
            "officer": "執行役員",
            "dept": "電子・樹脂・色材本部長"
          },
          {
            "date": "2021-06",
            "role": "常務執行役員事業企画本部長兼エネルギー事業推進本部長",
            "officer": "常務執行役員",
            "dept": "事業企画本部長兼エネルギー事業推進本部長"
          },
          {
            "date": "2022-04",
            "role": "常務執行役員事業企画本部長兼エネルギー事業本部長",
            "officer": "常務執行役員",
            "dept": "事業企画本部長兼エネルギー事業本部長"
          },
          {
            "date": "2022-06",
            "role": "取締役兼常務執行役員事業企画管掌兼エネルギー事業本部長兼バイオ・メディカル事業本部長",
            "board": "取締役",
            "officer": "常務執行役員",
            "dept": "事業企画管掌兼エネルギー事業本部長兼バイオ・メディカル事業本部長"
          },
          {
            "date": "2023-04",
            "role": "取締役兼常務執行役員事業企画管掌兼エネルギー事業本部長兼Beauty＆Personal Care統括部担当",
            "board": "取締役",
            "officer": "常務執行役員",
            "dept": "事業企画管掌兼エネルギー事業本部長兼Beauty&Personal Care統括部担当"
          },
          {
            "date": "2026-04",
            "role": "代表取締役社長兼執行役員社長事業本部統括",
            "board": "代表取締役",
            "title": "社長",
            "officer": "執行役員社長",
            "dept": "事業本部統括",
            "is_ceo_appointed": true
          }
        ]
      },
      {
        "company": "取締役兼常務執行役員営業担当兼界面活性剤事業本部長 サンアプロ㈱",
        "from": "2024-04",
        "to": null,
        "roles": [
          {
            "date": "2024-04",
            "role": "代表取締役社長（現）",
            "board": "代表取締役",
            "title": "社長",
            "current": true
          },
          {
            "date": "2024-06",
            "role": "取締役兼専務執行役員営業担当兼界面活性剤事業本部長兼営業拠点グループ統括",
            "board": "取締役",
            "officer": "専務執行役員",
            "dept": "営業担当兼界面活性剤事業本部長兼営業拠点グループ統括"
          },
          {
            "date": "2024-10",
            "role": "取締役兼専務執行役員営業担当兼営業拠点グループ統括",
            "board": "取締役",
            "officer": "専務執行役員",
            "dept": "営業担当兼営業拠点グループ統括"
          },
          {
            "date": "2025-04",
            "role": "取締役兼専務執行役員事業本部統括",
            "board": "取締役",
            "officer": "専務執行役員",
            "dept": "事業本部統括"
          },
          {
            "date": "2025-06",
            "role": "代表取締役兼専務執行役員事業本部統括（現）",
            "board": "代表取締役",
            "officer": "専務執行役員",
            "dept": "事業本部統括",
            "current": true
          }
        ]
      }
    ],
    "references": [
      {
        "source": "三洋化成工業 定時株主総会招集通知（2026年5月・取締役候補者のふりがな）",
        "url": null,
        "for": [
          "kana"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/4471/executives/ceo/harada-masahiro/",
    "term_start": "2026-04",
    "term_end": null,
    "api_url": "https://the-shashi.com/api/4471/ceo/harada-masahiro.json",
    "list_api_url": "https://the-shashi.com/api/4471/ceo.json",
    "predecessor": {
      "slug": "higuchi-akinori",
      "name": "樋口章憲",
      "api_url": "https://the-shashi.com/api/4471/ceo/higuchi-akinori.json"
    },
    "successor": null
  }
}