{
  "spec_version": "4",
  "endpoint": "ceo",
  "stock_code": "5480",
  "company_name": "日本冶金工業",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5480/ceo/",
  "api_url": "/api/5480/ceo.json",
  "updated": "2026-09-19",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/5480/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": 5,
  "ceo": [
    {
      "slug": "saji-yoichi",
      "name": "佐治雍一",
      "origin": "生え抜き（1963年入社）",
      "origin_type": "生え抜き",
      "hometown": null,
      "education": null,
      "prev_role": "代表取締役専務取締役",
      "career": [
        {
          "company": "日本冶金工業",
          "from": "1963-04",
          "to": null,
          "roles": [
            {
              "date": "1963-04",
              "role": "入社"
            },
            {
              "date": "1989-06",
              "role": "営業本部副本部長"
            },
            {
              "date": "1992-06",
              "role": "取締役に就任"
            },
            {
              "date": "1995-06",
              "role": "常務取締役に就任"
            },
            {
              "date": "1999-04",
              "role": "専務取締役に就任"
            },
            {
              "date": "2000-06",
              "role": "代表取締役専務取締役に就任"
            },
            {
              "date": "2001-06",
              "role": "代表取締役社長に就任",
              "is_ceo_appointed": true
            },
            {
              "date": "2008-06",
              "role": "取締役会長に就任"
            },
            {
              "date": "2008-06",
              "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": "2010-06",
              "role": "取締役相談役に就任"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/5480/executives/ceo/saji-yoichi/",
      "term_start": "2001-06",
      "term_end": "2008-06"
    },
    {
      "slug": "sugimori-ichita",
      "name": "杉森一太",
      "origin": "生え抜き（1971年入社）",
      "origin_type": "生え抜き",
      "hometown": null,
      "education": null,
      "prev_role": "常務取締役",
      "career": [
        {
          "company": "日本冶金工業",
          "from": "1971-04",
          "to": null,
          "roles": [
            {
              "date": "1971-04",
              "role": "入社"
            },
            {
              "date": "2001-06",
              "role": "企画室長"
            },
            {
              "date": "2003-06",
              "role": "取締役に就任"
            },
            {
              "date": "2005-05",
              "role": "常務取締役に就任"
            },
            {
              "date": "2008-06",
              "role": "代表取締役社長に就任",
              "is_ceo_appointed": true
            },
            {
              "date": "2012-12",
              "role": "社長退任（次期社長登用による推定）",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/5480/executives/ceo/sugimori-ichita/",
      "term_start": "2008-06",
      "term_end": "2012-12"
    },
    {
      "slug": "kimura-hajime",
      "name": "木村始",
      "kana": "きむら　はじめ",
      "hometown": null,
      "education": null,
      "prev_role": "興銀（現みずほ銀行）出身",
      "career": [
        {
          "company": "みずほ銀行",
          "from": "1974-04",
          "to": "2005-06",
          "roles": [
            {
              "date": "1974-04",
              "role": "日本興業銀行入行"
            },
            {
              "date": "2002-04",
              "role": "みずほコーポレート銀行執行役員"
            },
            {
              "date": "2003-03",
              "role": "常務執行役員"
            }
          ]
        },
        {
          "company": "日本冶金工業",
          "from": "2005-06",
          "to": null,
          "roles": [
            {
              "date": "2005-06",
              "role": "代表取締役専務取締役"
            },
            {
              "date": "2010-06",
              "role": "代表取締役副社長"
            },
            {
              "date": "2012-12",
              "role": "代表取締役社長",
              "is_ceo_appointed": true
            },
            {
              "date": "2019-04",
              "role": "代表取締役会長"
            },
            {
              "date": "2019-04",
              "role": "社長退任（次期社長登用による推定）",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/5480/executives/ceo/kimura-hajime/",
      "term_start": "2012-12",
      "term_end": "2019-04"
    },
    {
      "slug": "kubota-takashi",
      "name": "久保田尚志",
      "origin": "生え抜き（1978年入社）",
      "origin_type": "生え抜き",
      "hometown": null,
      "education": null,
      "prev_role": "日本冶金工業生え抜き",
      "career": [
        {
          "company": "日本冶金工業",
          "from": "1978-04",
          "to": null,
          "roles": [
            {
              "date": "1978-04",
              "role": "入社"
            },
            {
              "date": "2008-06",
              "role": "取締役"
            },
            {
              "date": "2010-06",
              "role": "常務取締役"
            },
            {
              "date": "2016-06",
              "role": "代表取締役専務執行役員"
            },
            {
              "date": "2019-04",
              "role": "代表取締役社長",
              "is_ceo_appointed": true
            },
            {
              "date": "2024-06",
              "role": "取締役会長"
            },
            {
              "date": "2024-06",
              "role": "社長退任（次期社長登用による推定）",
              "is_ceo_retired": true,
              "retirement_basis": "next_ceo"
            }
          ]
        }
      ],
      "html_url": "https://the-shashi.com/tse/5480/executives/ceo/kubota-takashi/",
      "term_start": "2019-04",
      "term_end": "2024-06"
    },
    {
      "slug": "urata-naruki",
      "name": "浦田成己",
      "origin": "生え抜き（1984年入社）",
      "origin_type": "生え抜き",
      "hometown": null,
      "education": null,
      "prev_role": "日本冶金工業生え抜き・海外営業出身",
      "career": [
        {
          "company": "日本冶金工業",
          "from": "1984-04",
          "to": null,
          "roles": [
            {
              "date": "1984-04",
              "role": "入社"
            },
            {
              "date": "2017-04",
              "role": "執行役員"
            },
            {
              "date": "2019-04",
              "role": "常務執行役員"
            },
            {
              "date": "2022-06",
              "role": "取締役"
            },
            {
              "date": "2023-04",
              "role": "専務執行役員"
            },
            {
              "date": "2024-06",
              "role": "代表取締役社長",
              "is_ceo_appointed": true
            }
          ]
        }
      ],
      "sections": {
        "tenure_summary": "ステンレス汎用品依存からニッケル基合金・高機能材へのポートフォリオシフトを加速する経営者である。\n\n2022年稼働の高効率電気炉E炉を起点に、製造原価競争力とCO2排出量削減を両立させる構造を引き継いだ。"
      },
      "html_url": "https://the-shashi.com/tse/5480/executives/ceo/urata-naruki/",
      "term_start": "2024-06",
      "term_end": null
    }
  ]
}