{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "4022",
  "company_name": "ラサ工業",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4022/executives/ceo/sakao-kosaku/",
  "api_url": "/api/4022/ceo/sakao-kosaku.json",
  "updated": "2026-10-27",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4022/executives/ceo/sakao-kosaku/",
  "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": "sakao-kosaku",
    "name": "坂尾耕作",
    "kana": "さかお　こうさく",
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    "education": null,
    "prev_role": null,
    "career": [
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        "company": "当社",
        "from": "1983-04",
        "to": null,
        "roles": [
          {
            "date": "1983-04",
            "role": "入社"
          }
        ]
      },
      {
        "company": "",
        "from": "1997-06",
        "to": null,
        "roles": [
          {
            "date": "1997-06",
            "role": "化成品事業部大阪工場製造一課長"
          },
          {
            "date": "2006-06",
            "role": "化成品事業部大阪工場長"
          },
          {
            "date": "2010-06",
            "role": "化成品事業部技術・開発担当部長"
          },
          {
            "date": "2011-01",
            "role": "電子材料事業部長兼営業部長"
          },
          {
            "date": "2011-06",
            "role": "取締役電子材料事業部長兼営業部長、ＲＡＭＭ開発センター長、ＮＣＲＩ営業部・研究開発担当"
          },
          {
            "date": "2016-07",
            "role": "取締役電子材料事業部長兼営業部長、ＮＣＲＩ営業部・研究開発担当"
          },
          {
            "date": "2018-10",
            "role": "取締役電子材料事業部長、ＮＣＲＩ営業部・研究開発担当"
          },
          {
            "date": "2019-06",
            "role": "代表取締役社長、電子材料事業部・ＮＣＲＩ営業部・研究開発担当",
            "is_ceo_appointed": true
          },
          {
            "date": "2020-06",
            "role": "代表取締役社長、研究開発担当"
          },
          {
            "date": "2023-06",
            "role": "代表取締役社長執行役員、研究開発担当"
          },
          {
            "date": "2024-06",
            "role": "代表取締役社長執行役員(現)"
          }
        ]
      }
    ],
    "sections": {
      "tenure_summary": null,
      "management_policy": null,
      "initiatives": null,
      "evaluation": null,
      "notable": null
    },
    "html_url": "https://the-shashi.com/tse/4022/executives/ceo/sakao-kosaku/",
    "term_start": "2019-06",
    "term_end": null,
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    "list_api_url": "https://the-shashi.com/api/4022/ceo.json",
    "predecessor": null,
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