History
| 1951 | Showa Denki Co., Ltd., was established at 2-1 Atago-cho, Minato-ku, Tokyo, with capital of 1 million yen. |
|---|---|
| 1952 | The company moved to 5-3 Shibashimbashi, Minato-ku, Tokyo |
| 1958 | Capital was increased to 10 million yen. |
| 1960 | An office building was constructed at 2-6-3 Higashishimbashi, Minato-ku, Tokyo, and the company moved there. |
| 1963 | Capital was increased to 50 million yen. |
| 1969 | An office building was constructed at 2-7-3 Higashishimbashi, Minato-ku, Tokyo, and the company moved there. |
| 1971 | Another company building was constructed at 1-12-14 Hamamatsu-cho, Minato-ku, Tokyo. |
| 1972 | Capital was increased to 100 million yen. |
| 1977 | Capital was increased to 121 million yen. |
| 1979 | Capital was increased to 150 million yen. Showa Denki (Singapore) Co., Pte. Ltd. was established. |
| 1981 | Capital was increased to 160 million yen. |
| 1984 | A new office building was constructed at 2-13-4 Higashishimbashi, Minato-ku, Tokyo. |
| 1985 | Thai Shoden Co., Ltd. was established. |
| 1990 | Capital was increased to 200 million yen. |
| 1992 | The company name was changed to Showa Astec Co., Ltd. |
| 1994 | ATS Construction International, Inc. was established in Philippines. |
| 1998 | ISO 9001 Certification was acquired. |
| 2003 | Palazzo Astec Building was constructed at 2-8-1 Higashishimbashi, Minato-ku, Tokyo. |
| 2006 | The first vehicle to diagnose electrical insulation for rotating machines was introduced. |
| 2008 | The second vehicle to diagnose electrical insulation for rotating machines was introduced. The real estate management company, Showa Corporation Co., Ltd., was established by company split. |
| 2009 | Showa Astec Co., Ltd., was converted into a holding company, and the name was changed to Showa Astec Holdings Co., Ltd. All sales, implementation, and management sections related to construction were transferred to present Showa Astec Co., Ltd. (Capital: 100 million yen) by company split. Shiinomori Center opened. |
| 2013 | Showa Astec Asia Holdings Pte. Ltd. was established in Singapore. AEIC Construction (M) Sdn. Bhd. was established in Malaysia. |
| 2014 | The head office moved to Palazzo Astec Building at 2-8-1 Higashishimbashi, Minato-ku, Tokyo. A new training building was completed in the Shiinomori Center. |
| 2019 | Fukui Servo Co., Ltd., entered the Showa Astec Group. |
| 2022 | Express 21 Pte. Ltd. entered the Showa Astec Group. |
