{
  "spec_version": "3",
  "endpoint": "timeline",
  "stock_code": "6481",
  "company_name": "THK",
  "content_lang": "ja",
  "meta_lang": "en",
  "canonical_url": "https://the-shashi.com/tse/6481/",
  "api_url": "/api/6481/timeline.json",
  "updated": "2026-09-05",
  "license": "© 2026 Yutaka Sugiura. All rights reserved.",
  "attribution": "The社史 (the-shashi.com) — https://the-shashi.com/tse/6481/",
  "source": {
    "primary": [
      "有価証券報告書"
    ],
    "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": "1971/4",
      "importance": 1,
      "event": "東邦精工を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1972/4",
      "importance": 2,
      "event": "LMガイド・ボールスプラインの販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1973/3",
      "importance": 1,
      "event": "宮入バルブ製作所と共同出資でテーエチケーを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1977/4",
      "importance": 2,
      "event": "テーエチケーから製造部門を買収し甲府工場に",
      "source": "有価証券報告書"
    },
    {
      "date": "1979/9",
      "importance": 2,
      "event": "ボールねじ製造販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1981/3",
      "importance": 1,
      "event": "シカゴにTHK Americaを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1984/1",
      "importance": 1,
      "event": "商号をTHKに変更",
      "source": "有価証券報告書"
    },
    {
      "date": "1985/4",
      "importance": 2,
      "event": "東洋精工を吸収合併し三重工場・山口工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1987/6",
      "importance": 1,
      "event": "インテリジェントアクチュエータ製造販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "1989/11",
      "importance": 3,
      "event": "株式店頭公開",
      "source": "有価証券報告書",
      "link": "/tse/6481/decisions/stock-listing-1989/"
    },
    {
      "date": "1991/6",
      "importance": 1,
      "event": "山形工場を新設",
      "source": "有価証券報告書"
    },
    {
      "date": "1992/8",
      "importance": 1,
      "event": "アイルランドのPGM Ballscrewsを買収",
      "source": "有価証券報告書"
    },
    {
      "date": "1996/3",
      "importance": 1,
      "event": "中国・大連THK瓦軸工業を合弁設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1997/1",
      "importance": 2,
      "event": "寺町博氏が代表権のない会長に退き、長男の寺町彰博氏が代表取締役社長に就任",
      "source": "有価証券報告書",
      "link": "/tse/6481/decisions/stock-listing-1989/"
    },
    {
      "date": "1997/8",
      "importance": 1,
      "event": "オハイオ州にTHK Manufacturing of Americaを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "1998/8",
      "importance": 1,
      "event": "リニアモータ製造販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2000/2",
      "importance": 1,
      "event": "エンジスハイムにTHK Manufacturing of Europeを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2001/1",
      "importance": 1,
      "event": "リテーナ入りローラーガイド製造販売を開始",
      "source": "有価証券報告書"
    },
    {
      "date": "2004/3",
      "importance": 1,
      "event": "中国・THK無錫精密工業を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2007/5",
      "importance": 3,
      "event": "リズムを子会社化",
      "source": "有価証券報告書",
      "link": "/tse/6481/decisions/rhythm-acquisition-2007/"
    },
    {
      "date": "2007/7",
      "importance": 1,
      "event": "THK RHYTHM THAILANDを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2011/3",
      "importance": 1,
      "event": "THK常州汽車配件を設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/2",
      "importance": 1,
      "event": "THK RHYTHM MEXICANAを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/3",
      "importance": 2,
      "event": "ボールジョイント製造開発部門をTHKリズムに会社分割で統合",
      "source": "有価証券報告書"
    },
    {
      "date": "2012/11",
      "importance": 1,
      "event": "インド・THK Indiaを設立",
      "source": "有価証券報告書"
    },
    {
      "date": "2015/8",
      "importance": 3,
      "event": "TRWからL&S事業を欧米で譲受",
      "source": "有価証券報告書",
      "link": "/tse/6481/decisions/trw-ls-acquisition-2015/"
    },
    {
      "date": "2022/4",
      "importance": 1,
      "event": "東京証券取引所プライム市場へ移行",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/1",
      "importance": 2,
      "event": "寺町崇史氏が代表取締役社長に就任、寺町彰博氏は代表取締役会長CEOへ",
      "source": "有価証券報告書"
    },
    {
      "date": "2024/5",
      "importance": 1,
      "event": "日本ベアリング桐生を完全子会社化",
      "source": "有価証券報告書"
    },
    {
      "date": "2025/10",
      "importance": 1,
      "event": "THK LM SYSTEM THAILANDを設立",
      "source": "有価証券報告書"
    }
  ]
}