{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "5404",
  "company_name": "日本鋼管",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/5404/executives/ceo/hammyo-masayuki/",
  "api_url": "/api/5404/ceo/hammyo-masayuki.json",
  "updated": "2026-10-27",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/5404/executives/ceo/hammyo-masayuki/",
  "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": "hammyo-masayuki",
    "name": "半明正之",
    "kana": "はんみょう　まさゆき",
    "origin": "副社長から昇格。川崎製鉄との経営統合を前に、統合後の鉄鋼事業会社の会長含みで社長に就いた",
    "origin_type": null,
    "hometown": null,
    "education": null,
    "prev_role": "副社長",
    "birthdate": null,
    "career": [
      {
        "company": "日本鋼管",
        "from": null,
        "to": null,
        "roles": [
          {
            "date": "2002-02",
            "role": "代表取締役社長",
            "is_ceo_appointed": true
          }
        ]
      }
    ],
    "references": [
      {
        "source": "日経ビジネス 2002年1月7日号 p18-19 2002年社長人事予想",
        "for": [
          "career"
        ]
      },
      {
        "source": "日経ビジネス 2003年4月21日号 p54-58 JFEスチール 異文化溶かし鉄の絆",
        "for": [
          "career",
          "kana"
        ]
      },
      {
        "source": "NKK 英文公式サイト Company Data（2002年6月20日時点の web.archive.org 保存）",
        "url": "https://web.archive.org/web/20020620004923/http://www.nkk.co.jp:80/en/company/data/index.html",
        "for": [
          "kana",
          "career"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/5404/executives/ceo/hammyo-masayuki/",
    "term_start": "2002-02",
    "term_end": null,
    "api_url": "https://the-shashi.com/api/5404/ceo/hammyo-masayuki.json",
    "list_api_url": "https://the-shashi.com/api/5404/ceo.json",
    "predecessor": {
      "slug": "shimogaichi-yoichi",
      "name": "下垣内洋一",
      "api_url": "https://the-shashi.com/api/5404/ceo/shimogaichi-yoichi.json"
    },
    "successor": null
  }
}