{
  "spec_version": "6",
  "endpoint": "ceo-person",
  "stock_code": "6324",
  "company_name": "ハーモニック・ドライブ・システムズ",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/6324/executives/ceo/sasahara-masakatsu/",
  "api_url": "/api/6324/ceo/sasahara-masakatsu.json",
  "updated": "2026-11-12",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/6324/executives/ceo/sasahara-masakatsu/",
  "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": "sasahara-masakatsu",
    "name": "笹原政勝",
    "kana": "ささはら　まさかつ",
    "surname": "笹原",
    "given_name": "政勝",
    "hometown": null,
    "prev_role": null,
    "career": [
      {
        "company": "ハーモニック・ドライブ・システムズ",
        "from": "1970-10",
        "to": null,
        "roles": [
          {
            "date": "1970-10",
            "role": "入社",
            "event": "入社"
          },
          {
            "date": "1987-01",
            "role": "開発本部長",
            "dept": "開発本部長"
          },
          {
            "date": "1987-03",
            "role": "取締役開発本部長就任",
            "board": "取締役",
            "dept": "開発本部長",
            "event": "就任"
          },
          {
            "date": "1993-09",
            "role": "取締役精機本部長就任",
            "board": "取締役",
            "dept": "精機本部長",
            "event": "就任"
          },
          {
            "date": "1995-06",
            "role": "常務取締役精機本部長就任",
            "board": "取締役",
            "title": "常務",
            "dept": "精機本部長",
            "event": "就任"
          },
          {
            "date": "1996-06",
            "role": "常務取締役未来事業本部長就任",
            "board": "取締役",
            "title": "常務",
            "dept": "未来事業本部長",
            "event": "就任"
          },
          {
            "date": "1998-06",
            "role": "常務取締役未来事業本部長兼品質保証責任者就任",
            "board": "取締役",
            "title": "常務",
            "dept": "未来事業本部長兼品質保証責任者",
            "event": "就任"
          },
          {
            "date": "1999-04",
            "role": "常務取締役未来事業本部長兼メカトロニクス本部長就任",
            "board": "取締役",
            "title": "常務",
            "dept": "未来事業本部長兼メカトロニクス本部長",
            "event": "就任"
          },
          {
            "date": "2001-06",
            "role": "常務取締役未来事業本部長兼技術担当就任",
            "board": "取締役",
            "title": "常務",
            "dept": "未来事業本部長兼技術担当",
            "event": "就任"
          },
          {
            "date": "2003-06",
            "role": "取締役兼開発技術担当執行役員就任",
            "board": "取締役",
            "dept": "開発技術担当執行役員",
            "event": "就任"
          },
          {
            "date": "2005-06",
            "role": "取締役兼専務執行役員最高技術責任者就任",
            "board": "取締役",
            "officer": "専務執行役員 最高技術責任者",
            "event": "就任"
          },
          {
            "date": "2007-06",
            "role": "代表取締役社長兼社長執行役員最高執行責任者兼最高技術責任者就任",
            "board": "代表取締役",
            "title": "社長",
            "officer": "社長執行役員 最高執行責任者 最高技術責任者",
            "event": "就任",
            "is_ceo_appointed": true
          },
          {
            "date": "2008-06",
            "role": "代表取締役社長兼社長執行役員最高執行責任者就任",
            "board": "代表取締役",
            "title": "社長",
            "officer": "社長執行役員 最高執行責任者",
            "event": "就任"
          },
          {
            "date": "2010-06",
            "role": "代表取締役社長兼社長執行役員ＣＯＯ就任",
            "board": "代表取締役",
            "title": "社長",
            "officer": "社長執行役員 COO",
            "event": "就任"
          },
          {
            "date": "2011-06",
            "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"
          }
        ]
      }
    ],
    "html_url": "https://the-shashi.com/tse/6324/executives/ceo/sasahara-masakatsu/",
    "term_start": "2007-06",
    "term_end": "2011-06",
    "api_url": "https://the-shashi.com/api/6324/ceo/sasahara-masakatsu.json",
    "list_api_url": "https://the-shashi.com/api/6324/ceo.json",
    "predecessor": {
      "slug": "熊谷信生",
      "name": "熊谷信生",
      "api_url": "https://the-shashi.com/api/6324/ceo/熊谷信生.json"
    },
    "successor": {
      "slug": "wakumoto-haruo",
      "name": "涌本晴雄",
      "api_url": "https://the-shashi.com/api/6324/ceo/wakumoto-haruo.json"
    }
  }
}