| 1949 | Founded "Kato Ironworks" at the present location Started the manufacture of small precision parts |
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| 1953 | With the development of business, the group was reorganized as a corporate organization with a capital of 600,000 yen and changed the company name to "Kato Seiki Ltd." |
| 1976 | In order to shed the existing system and promote the strengthening of the corporate structure, changed the corporate organization from "limited company" to "stock company". |
| 1982 | Completed a three-story reinforced concrete building to expand our factory. |
| 1984 | A founder From Kazuaki Kato, for Nidai Meka Akihiko Fuji, president change. |
| 1992 | Rebuilt the first factory. and changed a part of three-story building to four stories in order to achieve a high-rise building and to establish corporate culture of "comfortable space", "pleasant time", and "creative mind". Introduced CI to clarify our corporate vision for the new century. Changed the company name from "Kato Seiki Co., Ltd." to "AVEX" as the second foundation of the business. |
| 1993 | With the fourth increase of capital to 10 million yen, reinforced our corporate structure. |
| 1999 | Acquired ISO9002 certification in commemoration of the 50th anniversary. |
| 2003 | Underwent an inspection for transition to ISO9001: 2000 version |
| 2004 | Founded Tado factory as a production base for worldwide orders. |
| 2006 | Completed the Phase 2 extension work to expand production capability. |
| 2007 | ISO1400 authorization acquisition |
| 2009 | Issued commemorative publication for the 60th anniversary. |
| 2010 | Takenori Kato was appointed as the new president and representative director Akihiko Kato was appointed as a chairman and representative director |
| 2011 | Started "Kaizu Research Institute" aiming for more efficient production in cutting processes. |
| 2012 | TS16949 authorization acquisition |
| 2015 | Increase floor expansion of "Tado factory" is put into effect with production order-receiving increase and new customer pioneering. |
| 2017 | The headquarters function transfers from headquarters to Tado factory (development and industrial technology department). |
| 2018 | For production intension of ability, (Tado addition ends expansion extension completion with this) for 4 periods. |
| 2019 | 70th anniversary of foundation is met. |
