{
  "spec_version": "5",
  "endpoint": "ceo-person",
  "stock_code": "5632",
  "company_name": "三菱製鋼",
  "content_lang": "ja",
  "meta_lang": "en",
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  "updated": "2026-10-27",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/5632/executives/ceo/yamaguchi-jun/",
  "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": "yamaguchi-jun",
    "name": "山口淳",
    "kana": "やまぐち　じゅん",
    "hometown": null,
    "education": null,
    "prev_role": null,
    "career": [
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        "from": "1989-04",
        "to": null,
        "roles": [
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            "date": "1989-04",
            "role": "入社"
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      },
      {
        "company": "",
        "from": "2009-09",
        "to": null,
        "roles": [
          {
            "date": "2009-09",
            "role": "ばね営業部長"
          },
          {
            "date": "2014-04",
            "role": "ばね事業部副事業部長"
          },
          {
            "date": "2016-10",
            "role": "事業企画部営業企画部長"
          },
          {
            "date": "2017-07",
            "role": "事業企画部長"
          },
          {
            "date": "2019-06",
            "role": "取締役、事業企画部・資材部担当"
          },
          {
            "date": "2020-03",
            "role": "取締役、ばね事業・事業企画部・資材部担当"
          },
          {
            "date": "2021-06",
            "role": "取締役常務執行役員、企画統括部・資材部・システム部担当"
          },
          {
            "date": "2022-06",
            "role": "代表取締役社長執行役員（現任）",
            "is_ceo_appointed": true
          }
        ]
      }
    ],
    "sections": {
      "tenure_summary": null,
      "management_policy": null,
      "initiatives": null,
      "evaluation": null,
      "notable": null
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    "html_url": "https://the-shashi.com/tse/5632/executives/ceo/yamaguchi-jun/",
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    "term_end": null,
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    "list_api_url": "https://the-shashi.com/api/5632/ceo.json",
    "predecessor": {
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      "name": "佐藤基行",
      "api_url": "https://the-shashi.com/api/5632/ceo/sato-motoyuki.json"
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}