{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "4956",
  "company_name": "コニシ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/4956/executives/ceo/oyama-keiichi/",
  "api_url": "/api/4956/ceo/oyama-keiichi.json",
  "updated": "2026-10-26",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/4956/executives/ceo/oyama-keiichi/",
  "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": "oyama-keiichi",
    "name": "大山啓一",
    "kana": "おおやま　けいいち",
    "surname": "大山",
    "given_name": "啓一",
    "hometown": null,
    "education": null,
    "prev_role": null,
    "career": [
      {
        "company": "コニシ",
        "from": "1984-04",
        "to": null,
        "roles": [
          {
            "date": "1984-04",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "2012-04",
            "role": "ボンド事業本部ボンド営業本部建設事業部事業部長",
            "dept": "ボンド事業本部ボンド営業本部建設事業部事業部長"
          },
          {
            "date": "2014-04",
            "role": "社長室経営企画部統括部長",
            "dept": "社長室経営企画部統括部長"
          },
          {
            "date": "2014-06",
            "role": "執行役員社長室室長兼人事部統括部長",
            "officer": "執行役員",
            "dept": "社長室室長兼人事部統括部長"
          },
          {
            "date": "2015-04",
            "role": "コニシグループ統括部統括部長",
            "dept": "グループ統括部統括部長"
          },
          {
            "date": "2016-06",
            "role": "取締役執行役員に就任",
            "board": "取締役",
            "officer": "執行役員",
            "event": "就任"
          },
          {
            "date": "2021-04",
            "role": "海外事業グループＣＥＯ"
          },
          {
            "date": "2017-10",
            "role": "研究開発・生産・物流グループＣＥＯ兼研究開発・生産本部本部長兼生産管理部統括部長"
          },
          {
            "date": "2018-04",
            "role": "取締役常務執行役員に就任",
            "board": "取締役",
            "officer": "常務執行役員",
            "event": "就任"
          },
          {
            "date": "2019-04",
            "role": "ボンドグループボンド営業本部本部長兼営業推進部統括部長",
            "dept": "ボンドグループボンド営業本部本部長兼営業推進部統括部長"
          },
          {
            "date": "2019-09",
            "role": "関東支社支社長",
            "dept": "関東支社支社長"
          },
          {
            "date": "2021-04",
            "role": "代表取締役社長に就任",
            "board": "代表取締役",
            "title": "社長",
            "event": "就任",
            "is_ceo_appointed": true
          }
        ]
      },
      {
        "company": "ボンドケミカル商事㈱",
        "from": "2023-05",
        "to": null,
        "roles": [
          {
            "date": "2023-05",
            "role": "代表取締役会長に 就任"
          }
        ]
      },
      {
        "company": "コニシ",
        "from": "2024-04",
        "to": null,
        "roles": [
          {
            "date": "2024-04",
            "role": "取締役副会長に就任(現在)",
            "board": "取締役",
            "title": "副会長",
            "event": "就任",
            "current": true
          },
          {
            "date": "2024-05",
            "role": "科昵西貿易(上海)有限公司董事長に就任(現在) Kony Sunrise Trading Co.,Ltd.取締役会長に就任(現在) Konishi Lemindo Vietnam Co.,Ltd.取締役会長に就任(現在) PT.KONISHI INDONESIAコミサリスに就任(現在)"
          }
        ]
      }
    ],
    "references": [
      {
        "source": "コニシ 定時株主総会招集通知（2023年6月・取締役候補者のふりがな）",
        "url": null,
        "for": [
          "kana"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/4956/executives/ceo/oyama-keiichi/",
    "term_start": "2021-04",
    "term_end": "2024-04",
    "api_url": "https://the-shashi.com/api/4956/ceo/oyama-keiichi.json",
    "list_api_url": "https://the-shashi.com/api/4956/ceo.json",
    "predecessor": {
      "slug": "横田隆",
      "name": "横田隆",
      "api_url": "https://the-shashi.com/api/4956/ceo/横田隆.json"
    },
    "successor": {
      "slug": "matsubata-hirofumi",
      "name": "松端博文",
      "api_url": "https://the-shashi.com/api/4956/ceo/matsubata-hirofumi.json"
    }
  }
}