{
  "spec_version": "4",
  "endpoint": "ceo",
  "stock_code": "2284",
  "company_name": "伊藤ハム",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/2284/ceo/",
  "api_url": "/api/2284/ceo.json",
  "updated": "2026-10-03",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/2284/ceo/",
  "source": {
    "ceo": {
      "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"
    }
  },
  "count": 4,
  "ceo": [
    {
      "slug": "ito-kenichi",
      "name": "伊藤研一",
      "kana": "いとう　けんいち",
      "hometown": null,
      "education": "慶應義塾大学経済学部 (1960)",
      "prev_role": null,
      "career": [
        {
          "company": "伊藤ハム",
          "from": "1959-06",
          "to": null,
          "roles": [
            {
              "date": "1959-06",
              "role": "取締役就任"
            },
            {
              "date": "1965-05",
              "role": "常務取締役就任"
            },
            {
              "date": "1977-05",
              "role": "専務取締役就任"
            },
            {
              "date": "1981-07",
              "role": "代表取締役社長就任",
              "is_ceo_appointed": true
            },
            {
              "date": "2002-10",
              "role": "代表取締役会長就任"
            },
            {
              "date": "2002-10",
              "role": "社長退任（代表取締役会長へ）",
              "is_ceo_retired": true,
              "retirement_basis": "disclosure"
            },
            {
              "date": "2009-06",
              "role": "取締役相談役就任"
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": null,
        "management_policy": null,
        "initiatives": null
      },
      "html_url": "https://the-shashi.com/tse/2284/executives/ceo/ito-kenichi/",
      "term_start": "1981-07",
      "term_end": "2006-05"
    },
    {
      "slug": "kasai-chikara",
      "name": "河西力",
      "kana": "かさい　ちから",
      "hometown": null,
      "education": "中央大学法学部 (1965)",
      "prev_role": null,
      "career": [
        {
          "company": "伊藤ハム",
          "from": "1965-04",
          "to": null,
          "roles": [
            {
              "date": "1965-04",
              "role": "入社"
            },
            {
              "date": "1994-06",
              "role": "取締役就任"
            },
            {
              "date": "1998-03",
              "role": "常務取締役就任"
            },
            {
              "date": "2000-04",
              "role": "常務取締役兼執行役員就任"
            },
            {
              "date": "2003-06",
              "role": "専務取締役兼執行役員就任"
            },
            {
              "date": "2006-05",
              "role": "代表取締役社長就任",
              "is_ceo_appointed": true
            },
            {
              "date": "2009-03",
              "role": "加工食品事業本部・本部長"
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": null,
        "management_policy": null,
        "initiatives": null
      },
      "html_url": "https://the-shashi.com/tse/2284/executives/ceo/kasai-chikara/",
      "term_start": "2006-05",
      "term_end": "2010-04"
    },
    {
      "slug": "horio-mamoru",
      "name": "堀尾守",
      "kana": "ほりお　まもる",
      "hometown": null,
      "education": null,
      "prev_role": null,
      "career": [
        {
          "company": "三菱商事㈱",
          "from": "1971-04",
          "to": null,
          "roles": [
            {
              "date": "1971-04",
              "role": "入社"
            },
            {
              "date": "1998-08",
              "role": "飼料畜産部長"
            },
            {
              "date": "2002-04",
              "role": "執行役員生活産業グループＣＥＯ補佐"
            },
            {
              "date": "2003-04",
              "role": "執行役員食糧本部長"
            }
          ]
        },
        {
          "company": "日本農産工業㈱",
          "from": "2005-06",
          "to": null,
          "roles": [
            {
              "date": "2005-06",
              "role": "代表取締役社長"
            }
          ]
        },
        {
          "company": "伊藤ハム",
          "from": "2009-06",
          "to": null,
          "roles": [
            {
              "date": "2009-06",
              "role": "代表取締役副社長就任"
            },
            {
              "date": "2009-10",
              "role": "加工食品事業本部・本部長"
            },
            {
              "date": "2010-04",
              "role": "代表取締役社長就任",
              "is_ceo_appointed": true
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": null,
        "management_policy": null,
        "initiatives": null
      },
      "html_url": "https://the-shashi.com/tse/2284/executives/ceo/horio-mamoru/",
      "term_start": "2010-04",
      "term_end": "2016-04"
    },
    {
      "slug": "shibayama-ikuro",
      "name": "柴山育朗",
      "kana": "しばやま　いくろう",
      "hometown": null,
      "education": null,
      "prev_role": null,
      "career": [
        {
          "company": "伊藤ハムデイリー㈱",
          "from": "1978-04",
          "to": null,
          "roles": [
            {
              "date": "1978-04",
              "role": "入社"
            },
            {
              "date": "1998-03",
              "role": "東北事業部東北工場製造二部・部長"
            },
            {
              "date": "2002-03",
              "role": "東北工場製造部・部長"
            }
          ]
        },
        {
          "company": "伊藤ハム",
          "from": "2004-03",
          "to": null,
          "roles": [
            {
              "date": "2004-03",
              "role": "生産ディビジョン船橋工場・工場長"
            },
            {
              "date": "2009-03",
              "role": "加工食品事業本部生産本部技術部・部長"
            },
            {
              "date": "2010-04",
              "role": "執行役員就任 加工食品事業本部生産本部・本部長 購買部・中央研究所担当 ＩＨＰＳ担当"
            },
            {
              "date": "2010-06",
              "role": "取締役執行役員就任"
            },
            {
              "date": "2015-03",
              "role": "加工食品事業本部・本部長"
            },
            {
              "date": "2015-04",
              "role": "取締役常務執行役員就任"
            },
            {
              "date": "2016-04",
              "role": "代表取締役社長就任",
              "is_ceo_appointed": true
            }
          ]
        },
        {
          "company": "伊藤ハム米久ホールディングス㈱",
          "from": "2016-04",
          "to": null,
          "roles": [
            {
              "date": "2016-04",
              "role": "代表取締役副社長就任"
            }
          ]
        },
        {
          "company": "米久㈱",
          "from": "2016-04",
          "to": null,
          "roles": [
            {
              "date": "2016-04",
              "role": "取締役就任"
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": null,
        "management_policy": null,
        "initiatives": null
      },
      "html_url": "https://the-shashi.com/tse/2284/executives/ceo/shibayama-ikuro/",
      "term_start": "2016-04",
      "term_end": null
    }
  ]
}