| 1954-11 |
東京都品川区西大崎に資本金500万円で電気機械器具製造業として太洋電機産業（株）設立 |
| 1954-11 |
Taiyo Electric Industry Co., Ltd. founded as a manufacturer of electric machines and equipment in Nishi-Ohsaki, Shinagawa-ku, Tokyo, capitalized at 5,000,000 yen. |
| 1957-04 |
東京都荒川区西尾久に資本金100万円で各種電動機製造業として三央電機（株）設立 |
| 1957-04 |
Sano Denki K.K. established as a manufacturer of various types of electric machineries in Nishi-Ogu, Arakawa-ku, Tokyo, capitalized at 1,000,000 yen. |
| 1957-09 |
太洋電機産業（株）、日本電気精器（株）の系列に入る |
| 1957-09 |
Taiyo Electric Industry becomes a group company of Nippon Electric Industry Co., Ltd. |
| 1959-01 |
太洋電機産業（株）、業務・施設一切を東京都板橋区志村中台町に移転 |
| 1959-01 |
Taiyo Electric Industry moves all businesses and facilities to Shimura Nakadai-cho, Itabashi-ku, Tokyo. |
| 1959-11 |
三央電機（株）、資本金を300万円に増資 |
| 1959-11 |
Sano Denki K.K. increases capitalization to 3,000,000 yen. |
| 1960-10 |
三央電機（株）、資本金を500万円に増資 |
| 1960-10 |
Sano Denki K.K. increases capitalization to 5,000,000 yen. |
| 1960-11 |
太洋電機産業（株）、資本金を1,000万円に増資 |
| 1960-11 |
Taiyo Electric Industry increases capitalization to 10,000,000 yen. |
| 1961-09 |
三央電機（株）、資本金を1,000万円に増資 |
| 1961-09 |
Sano Denki K.K. increases capitalization to 10,000,000 yen. |
| 1964-04 |
太洋電機産業（株）、業務・施設一切を東京都台東区浅草清川町に移転 |
| 1964-04 |
Taiyo Electric Industry moves all businesses and facilities to Asakusa Kiyokawa-cho, Taito-ku, Tokyo. |
| 1967-10 |
太洋電機産業（株）、業務・施設一切を東京都墨田区堤通の日本電気精器（株）向島事業所構内に移転 |
| 1967-10 |
Taiyo Electric Industry moves all its businesses and facilities to the premises of Mukojima Office of Nippon Electric Industry Co., Ltd. at Tsutsumi-dori, Sumida-ku, Tokyo. |
| 1968-10 |
三央電機（株）、日本電気精器（株）の系列に入る |
| 1968-10 |
Sano Denki K.K. becomes a group company of Nippon Electric Industry Co., Ltd. |
| 1970-07 |
太洋電機産業（株）、大阪営業所を開設 |
| 1970-07 |
Taiyo Electric Industry establishes Osaka Branch Office in Osaka. |
| 1972-10 |
太洋電機産業（株）と三央電機（株）が対等合併し、資本金2,000万円、商号を太洋電機産業（株）とする |
| 1972-10 |
Taiyo Electric Industry and Sano Denki K.K. merge on equal terms, with capitalization of 20,000,000 yen, changing the trade name Taiyo Electric Industry. |
| 1973-12 |
資本金を4,000万円に増資 |
| 1973-12 |
Capitalization increased to 40,000,000 yen. |
| 1978-03 |
尾久回転機工場を閉鎖 |
| 1978-03 |
Ogu Rotary Machinery Plant closes. |
| 1979-05 |
日比谷通商（株）資本参加 |
| 1979-05 |
Hibiya Tsusho Co., Ltd. acquires capital in Taiyo Electric Industry. |
| 1983-06 |
資本金を5,000万円に増資 |
| 1983-06 |
Capitalization increased to 50,000,000 yen |
| 1985-03 |
筑波南第1工業団地内に11,985.61m2（約3,626坪）の工場用地を取得 |
| 1985-03 |
Factory land of 11,985.61 m2 (about 3,626 tsubo) acquired in the Tsukuba Minami First Industrial Estate |
| 1986-07 |
筑波工場の建設を開始 |
| 1986-07 |
Construction works for Tsukuba Plant start. |
| 1987-02 |
筑波工場完成 |
| 1987-02 |
Tsukuba Plant completed |
| 1987-04 |
本社・工場を筑波工場に移転 |
| 1987-04 |
The head office and plant moves to Tsukuba Plant. |
| 1987-10 |
資本金を10,250万円に増資 |
| 1987-10 |
Capitalization increased to 102,500,000 yen |
| 1989-01 |
東京営業所を日暮里に開設 |
| 1989-01 |
Tokyo Office opens in Nippori. |
| 1996-10 |
本社を東京（日暮里）に移転 |
| 1996-10 |
Head office moves to Tokyo (Nippori). |
| 1999-06 |
太洋電機産業（株）、日本電気（株）の系列に入る |
| 1999-06 |
Taiyo Electric Industry becomes a group company of NEC Corporation. |
| 1999-11 |
筑波工場 ISO 9001 認証取得 |
| 1999-11 |
Tsukuba Plant obtains ISO 9001 certification. |
| 2002-04 |
デンセイ・ラムダ（株）よりNTT制御盤事業を譲受する |
| 2002-04 |
NTT’s order for control panels taken over from Densei-Lambda K.K. |
| 2002-10 |
営業本部 ISO 9001 認証取得 |
| 2002-10 |
Sales Headquarters obtains ISO 9001 certification. |
| 2004-02 |
太洋電機産業（株）、野村證券グループの系列に入る |
| 2004-02 |
Taiyo Electric Industry becomes a group company of Nomura Securities. |
| 2006-11 |
本社 ISO 9001 認証取得 : 本社、筑波工場、大阪営業所 ISO 14001 認証取得 |
| 2006-11 |
Head Office obtains ISO 9001 certification. |
| 2006-11 |
Head Office, Tsukuba Plant and Osaka Branch Office obtain ISO 14001 certification. |
| 2007-02 |
MEBOにより親会社である野村プリンシパル・ファイナンス（株）より全株式を取得し資本金を8,500万円とする |
| 2007-02 |
All the stocks acquired from the parent company, Nomura Principal Finance Co. Ltd, through a Management and Employee Buyout (MEBO); capitalization set at 85,000,000 yen |
| 2011-11 |
大阪営業所 ISO 9001 認証取得 |
| 2011-11 |
Osaka Office obtains ISO 9001 certification. |
| 2018 |
ISO9001・ISO14001「2015規格」へ移行 |
| 2018 |
Our ISO 9001 and 14001 certification migrated to the 2015 edition. |
| 2022-08 |
筑波工場内に事務棟を建設 |
| 2022-08 |
Constructed an office building within the Tsukuba Factory. |
| 2023-01 |
筑波工場内に新倉庫を建設 |
| 2023-01 |
Constructed an new warehouse within the Tsukuba Factory. |
