{
  "spec_version": "3",
  "endpoint": "timeline",
  "stock_code": "6516",
  "company_name": "山洋電気",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/6516/",
  "api_url": "/api/6516/timeline.json",
  "updated": "2026-08-15",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/6516/",
  "source": {
    "primary": [
      "有価証券報告書",
      "公式サイト沿革",
      "公式サイト事業内容"
    ],
    "extraction": "有価証券報告書の沿革を基礎に、社史・報道で補完",
    "row_field": "source"
  },
  "timeline": [
    {
      "date": "1927/8",
      "importance": 3,
      "event": "山本秀雄が電気部品の輸入販売業として山洋商会を創立",
      "source": "有価証券報告書"
    },
    {
      "date": "1932/6",
      "importance": 2,
      "event": "東京都豊島区西巣鴨に山洋商会特殊電機製作所を開設",
      "source": "公式サイト沿革"
    },
    {
      "date": "1936/12",
      "importance": 2,
      "event": "株式会社に組織変更、商号を株式会社山洋商会に",
      "source": "有価証券報告書"
    },
    {
      "date": "1942/4",
      "importance": 2,
      "event": "商号を山洋電気に変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1943/8",
      "importance": 1,
      "event": "上田南工場と前橋工場を開設",
      "source": "有価証券報告書"
    },
    {
      "date": "1944/2",
      "importance": 2,
      "event": "長野県上田市に上田北工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1945/4",
      "importance": 2,
      "event": "戦災により本社・東京工場が全焼",
      "source": "有価証券報告書"
    },
    {
      "date": "1945/12",
      "importance": 1,
      "event": "本社・東京工場を東京都豊島区巣鴨に移転",
      "source": "有価証券報告書"
    },
    {
      "date": "1946/6",
      "importance": 1,
      "event": "上田南工場を上田北工場へ併合",
      "source": "有価証券報告書"
    },
    {
      "date": "1948/1",
      "importance": 1,
      "event": "前橋工場を閉鎖し上田工場へ併合",
      "source": "有価証券報告書"
    },
    {
      "date": "1952",
      "importance": 3,
      "event": "AC・DCサーボモータを日本で初めて製品化",
      "source": "公式サイト事業内容"
    },
    {
      "date": "1960/11",
      "importance": 1,
      "event": "埼玉県川口市に川口工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1962/9",
      "importance": 1,
      "event": "東京証券取引所市場第二部に上場",
      "source": "有価証券報告書"
    },
    {
      "date": "1965",
      "importance": 3,
      "event": "冷却ファンのブランド San Ace を立ち上げ",
      "source": "公式サイト事業内容"
    },
    {
      "date": "1973/3",
      "importance": 1,
      "event": "東京工場を上田・川口の両工場へ移転",
      "source": "有価証券報告書"
    },
    {
      "date": "1979/4",
      "importance": 1,
      "event": "上田事業所塩田工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1980/3",
      "importance": 1,
      "event": "上田事業所築地工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/11",
      "importance": 1,
      "event": "上田事業所青木工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1988/12",
      "importance": 2,
      "event": "初の海外子会社 SANYO DENKI EUROPE をフランスに設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1990/4",
      "importance": 1,
      "event": "上田事業所富士山工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1995/4",
      "importance": 1,
      "event": "SANYO DENKI AMERICA をアメリカに設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/7",
      "importance": 1,
      "event": "上田事業所にテクノロジーセンターを開設",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/12",
      "importance": 1,
      "event": "AUTOMATION INTELLIGENCE を買収",
      "source": "有価証券報告書"
    },
    {
      "date": "1999/3",
      "importance": 1,
      "event": "生産子会社の山洋電気テクノサービスを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1999/10",
      "importance": 2,
      "event": "川口事業所を上田事業所に統廃合",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/2",
      "importance": 2,
      "event": "SANYO DENKI PHILIPPINES を設立し海外生産を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/1",
      "importance": 1,
      "event": "上田事業所神川工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "2009/7",
      "importance": 1,
      "event": "山洋工業を完全子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/4",
      "importance": 1,
      "event": "中山市山洋电气有限公司を中国に設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2013/3",
      "importance": 1,
      "event": "東京証券取引所市場第一部に指定",
      "source": "有価証券報告書"
    },
    {
      "date": "2019/3",
      "importance": 1,
      "event": "SANYO DENKI PHILIPPINES にテクノロジーセンターを開設",
      "source": "公式サイト沿革"
    },
    {
      "date": "2021/5",
      "importance": 1,
      "event": "上田事業所テクノロジーセンターに新棟を開設",
      "source": "公式サイト沿革"
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "東京証券取引所の市場区分の見直しによりプライム市場に移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/4",
      "importance": 3,
      "event": "社内カンパニー制を導入",
      "source": "有価証券報告書"
    },
    {
      "date": "2026/2",
      "importance": 1,
      "event": "SANYO DENKI VIETNAM をベトナムに設立",
      "source": "有価証券報告書"
    }
  ]
}