{
  "spec_version": "6",
  "endpoint": "ceo-person",
  "stock_code": "3407",
  "company_name": "旭化成",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/3407/executives/ceo/seko-maomi/",
  "api_url": "/api/3407/ceo/seko-maomi.json",
  "updated": "2026-10-29",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/3407/executives/ceo/seko-maomi/",
  "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": "seko-maomi",
    "name": "世古真臣",
    "kana": "せこ　まおみ",
    "surname": "世古",
    "given_name": "真臣",
    "origin": "生え抜き（1948年入社）。イオン交換膜法など技術畑を歩み、副社長を経て1985年6月に社長へ。1989年6月に副会長",
    "origin_type": "生え抜き",
    "hometown": "三重県尾鷲市",
    "education": "東京大学工学部電気工学科 (1948)",
    "education_source": "https://ja.wikipedia.org/wiki/%E4%B8%96%E5%8F%A4%E7%9C%9F%E8%87%A3",
    "prev_role": "取締役副社長",
    "career": [
      {
        "company": "旭化成工業",
        "from": "1948",
        "to": null,
        "roles": [
          {
            "date": "1948",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "1979-06",
            "role": "取締役副社長",
            "board": "取締役",
            "title": "副社長"
          },
          {
            "date": "1985-06",
            "role": "取締役社長",
            "board": "取締役",
            "title": "社長",
            "is_ceo_appointed": true
          },
          {
            "date": "1989-06",
            "role": "取締役副会長",
            "board": "取締役",
            "title": "副会長"
          },
          {
            "date": "1989-06",
            "role": "社長退任（次期社長登用による推定）",
            "title": "社長",
            "event": "退任",
            "estimated": true,
            "is_ceo_retired": true,
            "retirement_basis": "next_ceo"
          },
          {
            "date": "1993-06",
            "role": "相談役",
            "title": "相談役"
          }
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/3407/executives/ceo/seko-maomi/",
    "term_start": "1985-06",
    "term_end": "1989-06",
    "api_url": "https://the-shashi.com/api/3407/ceo/seko-maomi.json",
    "list_api_url": "https://the-shashi.com/api/3407/ceo.json",
    "predecessor": {
      "slug": "miyazaki-kagayaki",
      "name": "宮崎輝",
      "api_url": "https://the-shashi.com/api/3407/ceo/miyazaki-kagayaki.json"
    },
    "successor": {
      "slug": "yumikura-reiichi",
      "name": "弓倉礼一",
      "api_url": "https://the-shashi.com/api/3407/ceo/yumikura-reiichi.json"
    }
  }
}