{
  "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/asano-ryozo/",
  "api_url": "/api/5404/ceo/asano-ryozo.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/asano-ryozo/",
  "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": "asano-ryozo",
    "name": "浅野良三",
    "kana": "あさの　りょうぞう",
    "origin": "浅野総一郎氏の子。浅野系の製鉄・造船から副社長を経て、白石元治郎氏の会長就任とともに社長へ",
    "origin_type": null,
    "hometown": null,
    "education": null,
    "prev_role": "副社長",
    "birthdate": "1889",
    "career": [
      {
        "company": "日本鋼管",
        "from": null,
        "to": "1946-04",
        "roles": [
          {
            "date": "1942-06",
            "role": "社長",
            "is_ceo_appointed": true
          },
          {
            "date": "1946-04",
            "role": "社長辞任（公職追放を予期して退任）",
            "is_ceo_retired": true,
            "retirement_basis": "history"
          }
        ]
      }
    ],
    "references": [
      {
        "source": "日本鋼管株式会社五十年史（日本鋼管、1962年）",
        "url": "https://dl.ndl.go.jp/pid/1697480",
        "for": [
          "career"
        ]
      },
      {
        "source": "随筆日本鋼管 七十年の歩み（1983年）",
        "url": "https://dl.ndl.go.jp/pid/11955597",
        "for": [
          "origin"
        ]
      },
      {
        "source": "浅野良三編『浅野栄作追悼録』国立国会図書館サーチ書誌（著者標目 アサノ, リョウゾウ, 1889-1965）",
        "for": [
          "kana",
          "birthdate"
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/5404/executives/ceo/asano-ryozo/",
    "term_start": "1942-06",
    "term_end": "1946-04",
    "api_url": "https://the-shashi.com/api/5404/ceo/asano-ryozo.json",
    "list_api_url": "https://the-shashi.com/api/5404/ceo.json",
    "predecessor": {
      "slug": "okawa-heizaburo",
      "name": "大川平三郎",
      "api_url": "https://the-shashi.com/api/5404/ceo/okawa-heizaburo.json"
    },
    "successor": {
      "slug": "渡辺政人",
      "name": "渡辺政人",
      "api_url": "https://the-shashi.com/api/5404/ceo/渡辺政人.json"
    }
  }
}