{
  "spec_version": "6",
  "endpoint": "ceo-person",
  "stock_code": "5711",
  "company_name": "三菱マテリアル",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5711/executives/ceo/ide-akihiko/",
  "api_url": "/api/5711/ceo/ide-akihiko.json",
  "updated": "2026-11-12",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/5711/executives/ceo/ide-akihiko/",
  "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": "ide-akihiko",
    "name": "井手明彦",
    "kana": "いで　あきひこ",
    "surname": "井手",
    "given_name": "明彦",
    "origin": "生え抜き（1965年入社）。2002年に取締役副社長、2004年に社長へ",
    "origin_type": "生え抜き",
    "hometown": "福岡県",
    "prev_role": "取締役副社長",
    "career": [
      {
        "company": "三菱マテリアル",
        "from": "1965-04",
        "to": null,
        "roles": [
          {
            "date": "1965-04",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "1994-06",
            "role": "総務部長",
            "dept": "総務部長"
          },
          {
            "date": "1997-06",
            "role": "取締役・総務部長",
            "board": "取締役",
            "dept": "総務部長"
          },
          {
            "date": "2000-06",
            "role": "常務取締役",
            "board": "取締役",
            "title": "常務"
          },
          {
            "date": "2002-06",
            "role": "取締役副社長",
            "board": "取締役",
            "title": "副社長"
          },
          {
            "date": "2004-06",
            "role": "取締役社長",
            "board": "取締役",
            "title": "社長",
            "is_ceo_appointed": true
          },
          {
            "date": "2010-06",
            "role": "社長退任（次期社長登用による推定）",
            "title": "社長",
            "event": "退任",
            "estimated": true,
            "is_ceo_retired": true,
            "retirement_basis": "next_ceo"
          }
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/5711/executives/ceo/ide-akihiko/",
    "term_start": "2004-06",
    "term_end": "2010-06",
    "api_url": "https://the-shashi.com/api/5711/ceo/ide-akihiko.json",
    "list_api_url": "https://the-shashi.com/api/5711/ceo.json",
    "predecessor": {
      "slug": "nishikawa-akira",
      "name": "西川章",
      "api_url": "https://the-shashi.com/api/5711/ceo/nishikawa-akira.json"
    },
    "successor": {
      "slug": "yao-hiroshi",
      "name": "矢尾宏",
      "api_url": "https://the-shashi.com/api/5711/ceo/yao-hiroshi.json"
    }
  }
}