{
  "spec_version": "4",
  "endpoint": "ceo",
  "stock_code": "8609",
  "company_name": "岡三証券グループ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/8609/ceo/",
  "api_url": "/api/8609/ceo.json",
  "updated": "2026-09-16",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/8609/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": 3,
  "ceo": [
    {
      "slug": "kato-seiichi",
      "name": "加藤精一",
      "kana": "かとう　せいいち",
      "hometown": null,
      "education": null,
      "prev_role": null,
      "career": [
        {
          "company": "岡三証券グループ",
          "from": "1954-04",
          "to": null,
          "roles": [
            {
              "date": "1954-04",
              "role": "入社"
            },
            {
              "date": "1954-11",
              "role": "取締役就任"
            },
            {
              "date": "1956-11",
              "role": "常務取締役就任"
            },
            {
              "date": "1958-11",
              "role": "専務取締役就任"
            },
            {
              "date": "1961-06",
              "role": "取締役社長就任",
              "is_ceo_appointed": true
            },
            {
              "date": "1997-06",
              "role": "取締役会長就任"
            },
            {
              "date": "1997-06",
              "role": "社長退任",
              "is_ceo_retired": true,
              "retirement_basis": "history"
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": null,
        "management_policy": null,
        "initiatives": null
      },
      "html_url": "https://the-shashi.com/tse/8609/executives/ceo/kato-seiichi/",
      "term_start": "1961-06",
      "term_end": "1997-06"
    },
    {
      "slug": "kato-tetsuo",
      "name": "加藤哲夫",
      "kana": "かとう　てつお",
      "hometown": null,
      "education": null,
      "prev_role": null,
      "career": [
        {
          "company": "三菱銀行",
          "from": "1970-05",
          "to": "1986-06",
          "roles": [
            {
              "date": "1970-05",
              "role": "入行"
            }
          ]
        },
        {
          "company": "岡三証券グループ",
          "from": "1986-06",
          "to": "2022-06",
          "roles": [
            {
              "date": "1986-06",
              "role": "入社"
            },
            {
              "date": "1986-12",
              "role": "取締役就任"
            },
            {
              "date": "1989-06",
              "role": "常務取締役就任"
            },
            {
              "date": "1991-06",
              "role": "専務取締役就任"
            },
            {
              "date": "1995-06",
              "role": "取締役副社長就任"
            },
            {
              "date": "1997-06",
              "role": "取締役社長就任",
              "is_ceo_appointed": true
            },
            {
              "date": "2014-04",
              "role": "取締役副会長就任"
            },
            {
              "date": "2014-04",
              "role": "社長退任（次期社長登用による推定）",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            },
            {
              "date": "2020-04",
              "role": "取締役会長就任"
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": null,
        "management_policy": null,
        "initiatives": null
      },
      "html_url": "https://the-shashi.com/tse/8609/executives/ceo/kato-tetsuo/",
      "term_start": "1997-06",
      "term_end": "2014-04"
    },
    {
      "slug": "shinshiba-hiroyuki",
      "name": "新芝宏之",
      "kana": "しんしば　ひろゆき",
      "hometown": null,
      "education": null,
      "prev_role": null,
      "career": [
        {
          "company": "岡三証券グループ",
          "from": "1981-04",
          "to": null,
          "roles": [
            {
              "date": "1981-04",
              "role": "入社"
            },
            {
              "date": "2001-06",
              "role": "取締役就任"
            },
            {
              "date": "2004-06",
              "role": "常務取締役就任"
            },
            {
              "date": "2006-06",
              "role": "専務取締役就任"
            },
            {
              "date": "2011-04",
              "role": "専務取締役 企画部門・人事企画部担当"
            },
            {
              "date": "2014-04",
              "role": "取締役社長就任",
              "is_ceo_appointed": true
            }
          ]
        },
        {
          "company": "岡三証券",
          "from": "2003-10",
          "to": null,
          "roles": [
            {
              "date": "2003-10",
              "role": "常務取締役就任"
            },
            {
              "date": "2020-04",
              "role": "取締役会長就任"
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": null,
        "management_policy": null,
        "initiatives": null
      },
      "html_url": "https://the-shashi.com/tse/8609/executives/ceo/shinshiba-hiroyuki/",
      "term_start": "2014-04",
      "term_end": null
    }
  ]
}