| 1928-06 |
Tsunekawa Ironworks was founded. Began stamping business |
| 1928-06 |
恒川鉄工所を創業、プレス加工を開始 |
| 1934-09 |
Began business relationships with Toyoda Automatic Loom Works, Ltd. |
| 1934-09 |
株式会社豊田自動織機製作所と取引開始 |
| 1937-08 |
Began business relationships with Toyota Motor Corporation |
| 1937-08 |
トヨタ自動車工業株式会社と取引開始 |
| 1940-02 |
Added facilities for drawn and cold finished steel bar |
| 1940-02 |
引抜磨棒鋼部を増設 |
| 1948-06 |
Changed name to Sango Manufacturing |
| 1948-06 |
三五製作所と改称 |
| 1950-06 |
Incorporated to form Sango Co., Ltd. |
| 1950-06 |
株式会社三五を設立 |
| 1950-09 |
Takakura Plant was established(former Nagoya Plant, current Head Office) |
| 1950-09 |
高蔵工場（現・ECO35、旧名古屋工場）を新設 |
| 1954-03 |
Production of muffler and exhaust system had began |
| 1954-03 |
排気系（マフラー、エキゾースト）の製造開始 |
| 1962-05 |
Muffler and exhaust system laboratory was established at Nagoya Plant |
| 1962-05 |
本社名古屋工場にマフラー、エキゾーストパイプの研究室を設置 |
| 1963-06 |
Completed Toyota Plant |
| 1963-06 |
豊田工場を新設 |
| 1965-12 |
Tooling Department was reorganized as an independent company, Sanko Seiki Co., Ltd. |
| 1965-12 |
工機部門を独立させ、株式会社三幸精機を設立 |
| 1967-08 |
Miyoshi Plant was established (plant specializing in cold finished steel bars) |
| 1967-08 |
三好工場を新設 |
| 1970-10 |
Shipping Department was reorganized as an independent company called Sanai Unyu Co., Ltd. |
| 1970-10 |
輸送部門を独立させ、三愛運輸株式会社を設立 |
| 1971-07 |
Sanwa Koki was founded |
| 1971-07 |
三和工機株式会社を設立 |
| 1972-02 |
Began business relationships with Daihatsu Motor Co., Ltd. |
| 1972-02 |
ダイハツ工業株式会社と取引開始 |
| 1973-04 |
Bulge processing department was reorganized as an independent company called Shinwa Bulge Co., Ltd. |
| 1973-04 |
バルジ部門を独立させ、伸和バルジ株式会社を設立 |
| 1973-08 |
Sanritsu Co., Ltd. was founded |
| 1973-08 |
Completed Fukuta Plant |
| 1973-08 |
株式会社三立を設立 |
| 1973-08 |
福田工場を新設 |
| 1973-11 |
Completed engineering and technical research center at the Toyota Plant |
| 1973-11 |
豊田工場にマフラー、エキゾーストパイプの技術・研究棟を完成 |
| 1976-05 |
The Toyota Production System was introduced in Sango operations |
| 1976-05 |
トヨタ生産方式を導入 |
| 1977-02 |
Tube mill was installed |
| 1977-02 |
造管設備を導入 |
| 1984-11 |
Completed Takaoka Plant |
| 1984-11 |
高岡工場を新設 |
| 1986-12 |
Completed Toyohashi Plant |
| 1986-12 |
とよはし工場を新設 |
| 1987-01 |
Arvin Sango, Inc., a joint venture with Arvin Industries, was founded in the United States (started oversea operations) |
| 1987-01 |
米国に合弁会社「Arvin Sango, Inc.」設立（初の海外進出） |
| 1990-05 |
Completed Yawatayama Plant |
| 1990-05 |
八和田山工場を新設 |
| 1994-08 |
Technical Center at Yawatayama Plant was built |
| 1994-08 |
八和田山工場に技術本館を完成 |
| 1995-10 |
Takaoka Plant received the Director-General Award from the Agency of Industrial Science and Technology |
| 1995-10 |
高岡工場、工業技術院長表彰受賞 |
| 1995-11 |
TPM Prize of Excellence (highest rank) was awarded to Automotive Parts Division |
| 1995-11 |
部品部門、TPM優秀賞 第1類を受賞 |
| 1996-04 |
YS Pund, a joint venture, was founded in Thailand |
| 1996-04 |
タイに合弁会社「YS Pund Co., Ltd」設立 |
| 2000-07 |
Fukuta Plant received certification for ISO 14001 (Environmental Management) |
| 2000-07 |
福田工場ISO 14001認証を取得 |
| 2000-08 |
Miyoshi and Takaoka Plants received certification for ISO 14001 (Environmental Management) |
| 2000-08 |
三好・高岡工場ISO 14001認証を取得 |
| 2002-03 |
Sango Komeno Co., Ltd. was founded |
| 2002-03 |
株式会社三五米野を設立 |
| 2002-04 |
Sango Turkey, Inc. was founded in Turkey. |
| 2002-04 |
トルコに「Sango Turkey, Inc.」を設立 |
| 2002-08 |
Completed the Miyoshi No. 3 Plant |
| 2002-08 |
三好第3工場を新設 |
| 2003-01 |
Sanpuku Co., Ltd. was founded in Kyushu |
| 2003-01 |
株式会社三福を設立 |
| 2003-05 |
Tianjin Sango Automotive Parts Co., Ltd. was founded in China |
| 2003-05 |
中国に天津三五汽車部件有限公司を設立 |
| 2004-08 |
Guangzhou Sango Automotive Parts Co., Ltd. was founded in China |
| 2004-08 |
中国に広州三五汽車部件有限公司を設立 |
| 2005-10 |
Group businesses Sanko Seiki and Shinwa Bulge were integrated into Sango Co., Ltd. |
| 2005-10 |
株式会社三幸精機及び伸和バルジ株式会社を株式会社三五に併合 |
| 2007-02 |
Sango Hokkaido Co., Ltd. was founded |
| 2007-02 |
株式会社三五北海道を設立 |
| 2008-03 |
Sango Mie Co., Ltd. was founded |
| 2008-03 |
株式会社三五三重を設立 |
| 2008-06 |
80th anniversary of company founding was celebrated |
| 2008-11 |
Sango Kanto Co., Ltd. was founded |
| 2008-11 |
株式会社三五関東を設立 |
| 2010-04 |
Sango Mie Co., Ltd. was merged with Sango Komeno (The new company was named Sango Mie) |
| 2010-04 |
株式会社三五三重を株式会社三五米野に併合（商号は株式会社三五三重） |
| 2011-09 |
Arvin Sango Canada, Inc., a subsidiary of Arvin Sango, Inc. was founded in Canada |
| 2011-09 |
Arvin Sango, Inc.がカナダに子会社「Arvin Sango Canada, Inc.」を設立 |
| 2012-04 |
PT. Sango Indonesia was founded in Indonesia |
| 2012-04 |
Xiangyang Sango Automotive Parts Co., Ltd. was founded in China |
| 2012-04 |
インドネシアに「PT. Sango Indonesia」を設立 |
| 2012-04 |
中国に「襄陽三五汽車部件有限公司」を設立 |
| 2012-12 |
Sango India Automotive Parts Pvt. Ltd. was founded in India |
| 2012-12 |
インドに「Sango India Automotive Parts Pvt. Ltd.」を設立 |
| 2013-11 |
Sango Thai Automotive Parts Co., Ltd. was founded in Thailand |
| 2013-11 |
タイに「Sango Thai Automotive Parts Co., Ltd.」を設立 |
| 2014-04 |
Tsunekawa Tekkosho Institute Co., Ltd. was founded |
| 2014-04 |
株主会社TTIを設立 |
| 2014-12 |
Sango Auto Parts Mexico, S.A. de C.V. was founded in Mexico |
| 2014-12 |
メキシコに「Sango Auto Parts Mexico, S.A. de C.V.」を設立 |
| 2015-06 |
2nd Technical Center was built at Sango's Toyota Technical Center (former Toyota Plant) |
| 2015-06 |
豊田技術センター（旧・豊田工場）に第２技術館を完成 |
| 2016-05 |
Guangzhou Sango R & D Center was built in China |
| 2016-05 |
中国に「広州三五 R&Dセンター」を完成 |
| 2017-10 |
ASI Technical Center was built in the United States |
| 2017-10 |
アメリカに「ASI テクニカルセンター」を完成 |
| 2018-06 |
90th anniversary of company founding was celebrated |
| 2018-06 |
創業90周年 |
| 2018-10 |
Sango Mie Co., Ltd. was merged with Sango Co., Ltd. |
| 2018-10 |
株式会社三五三重を株式会社三五に併合 |
| 2019-04 |
Sango Corporation Ltd. was merged with Sango Co., Ltd. |
| 2019-04 |
三五コーポレーション株式会社を株式会社三五に併合及び本社移転 |
| 2020-07 |
YS Pund Co., Ltd was merged with Sango Thai Automotive Parts Co., Ltd. In Thailand (The new company was named SANGO Thai Engineering & Manufacturing Co., Ltd. ) |
| 2020-07 |
タイのYS Pund Co.,Ltd.とSango Thai Automotive Parts Co.,Ltd.が合併、社名を「Sango Thai Engineering ＆ Manufacturing. Co.,Ltd.」に改称 |
| 2021-04 |
TTI changed its name to Sango Technical Research Institute, Ltd. and Sango Family Services to Sango Partners Co., Ltd. |
| 2021-04 |
株式会社TTIを株式会社三五技術研究所に、 : 株式会社サンゴファミリーサービスを : 株式会社三五パートナーズに改称 |
| 2021-06 |
Sango received accreditation for ISO 9001:2015 |
| 2021-06 |
ISO 9001：2015を認証取得 |
| 2023-05 |
Built the new press building at Fukuta Plant |
| 2023-05 |
福田工場に新プレス棟完成 |
| 2024-04 |
Sango Technical Research Institute, Ltd. changed its name to SANGO MachineTech Co., Ltd. |
| 2024-04 |
株式会社三五技術研究所を株式会社SANGOマシンテックに改称 |
| 2024-10 |
MEGLiS Co., Ltd. was founded |
| 2024-10 |
株式会社メグリスを設立 |
| 2025-04 |
Sanpuku Co., Ltd. changed its name to SANGO Kyushu Co., Ltd. |
| 2025-04 |
株式会社三福を株式会社三五九州に改称 |
| 2025-05 |
Built the Fukuta Distribution Center at Fukuta Plant |
| 2025-05 |
福田工場に物流センターを完成 |
