- 2024/6
- Established Shiga Technical Center in Kusatsu City
- 2024/5
- Established Tottori Technical Center in Tottori City
- 2024/4
- Astecnos Co., Ltd. becomes a subsidiary
- 2023/9
- Established local subsidiary in Philippines
- 2022/4
- Listed on the Standard Market of the Tokyo Stock Exchange
- 2022/2
- Established local subsidiary in Vietnam
- 2020/8
- Established IMD CO.,LTD.
- 2019/11
- Expansion of Fukushima factory
- 2019/8
- Head office relocated to Omiya Ward, Saitama City, Tokyo Technology Development Center established
- 2018/11
- Expansion of Nagasaki factory
- 2018/4
- Shikoku Technical Center established in Matsuyama
- 2017/5
- Established joint venture in Changzhou, China
- 2015/5
- Established local subsidiary in Austria
- 2014/5
- Nittoku Koide Co., Ltd.Nittoku Koide Co., Ltd. (former Koide Engineering Co., Ltd.) becomes a subsidiary
- 2013/4
- Nagasaki Office established in Omura City
- 2010/3
- Established a local subsidiary in Korea
- 2008/9
- Nittoku Kosei Co., Ltd.Nittoku Kosei Co., Ltd. (formerly Kosei Co., Ltd.) becomes a subsidiary
- 2007/3
- Established a local subsidiary in the United States
- 2006/11
- Established local subsidiary in Shanghai, China
- 2005/6
- Established local subsidiary in Shenzhen, China
- 2002/7
- Established local subsidiary in Suzhou, China
- 2001/7
- Established local subsidiary in Taipei, Taiwan
- 2000/10
- Established local subsidiary in Singapore
- 1998/6
- Established local subsidiary in Malaysia
- 1996/7
- Established local subsidiary in Thailand
- 1996/7
- Established local subsidiary in Hong Kong
- 1991/12
- Established Fukushima factory (former: Fukushima Plant) in Iino-machi, Fukushima City (former Date-gun)
- 1989/1
- Listed on JASDAC (formerly over-the-counter trading)
- 1974/4
- Head office relocated to Saitama City (former Urawa City)
- 1972/9
- Company established in Yachiyo City