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| Sep. 1945 | Tatsuta Electric Wire & Cable Co., Ltd. was established. |
|---|---|
| Aug. 1952 | Construction of Osaka Works started. |
| Oct. 1955 | Production and supply of communication cables starrted. |
| Jan. 1962 | production and supply of XLPE insulated cables started. |
| Apr. 1976 | Operation of Fukuchiyama Works started. |
| Sep. 1981 | Production and supply of electronicsrelated equipments started. |
| Apr. 1984 | Production and supply of optical fiber cables started. |
| Feb. 1985 | Operation of the bonding wire plant started. |
| Aug. 1987 | Production and supply of polymer based conductive copper pastes started. |
| Dec. 1992 | Optical fiber cable Fukuchiyama Works completed. |
| Nov. 1994 | New business division acquired authorization of ISO 9002. |
| Nov. 1996 | Telecommunication division acquired authorization of ISO 9001 |
| Jan. 1997 | Commercial production of optical fiber coupler started. |
| May. 1998 | Electric wire & cable division acquired authorization of ISO 9001. |
| Nov. 1999 | Telecommunication division acquired authorization of ISO 14001. |
| Feb. 2001 | Optical component division acquired authorization of ISO 9001. |
| Jan. 2002 | Osaka district acquired authorization of ISO 14001. |
| Mar. 2002 | Consolidated subsidiary, Tatsuta System Electronics Co., Ltd. was established. |
| Jul. 2002 | Tatsuta Electric Wire & Cable Co., Ltd. invested in joint corporation, Sumiden Hitachi Cable Ltd., which runs business of electric wire for construction and wholesaler. |
| May. 2005 | Tatsuta System Electronics Co., Ltd. reinforced production facilities of FPC shielding film. |
| Apr. 2007 | Chugoku Electric Wire & Cable Co., Ltd. (consolidated subsidiary) merged Marutoyo Electric Wire & Cable Co., Ltd. (consolidated subsidiary). |
| Dec. 2008 | Tatsuta System Electronics Co., Ltd Kyoto Works completed. |
Jul. 2009 | Tatsuta Transport co., Ltd started. |
| Apr. 2010 | Tatsuta Electric Wire & Cable Co., Ltd. merged Tatsuta System Electronics Co., Ltd.(consolidated subsidiary). |
| Apr. 2011 | Tatsuta Electric Wire & Cable Co., Ltd. merged Tatsuta Shoji Co., Ltd.(consolidated subsidiary). |
