| April 1977 |
SIGMAKOKI Co., Ltd. founded in Tabame, Hidaka-cho, Iruma-gun, Saitama Prefecture (now Hidaka-shi, Saitama Prefecture) for manufacture and sales of laser-related optical equipment. |
| May 1982 |
Head office relocated to new head office facilities and factory at Harajuku, Hidaka-cho, Iruma-gun, Saitama Prefecture (now Hidaka-shi, Saitama Prefecture). |
| October 1984 |
First edition of general catalog of standardized products released. Non-store sales operations begin. |
| November 1986 |
Tokyo sales office opens in Narimasu, Itabashi-ku, Tokyo. |
| March 1989 |
Noto Plant established in Noto Industrial Park in Ishikawa Prefecture. This plant became eligible for a grant created by Ishikawa Prefecture’s advanced industry promotion ordinance. |
| July 1990 |
Head office and main factory functions relocated to new head office building and factory in Shimotakahagi-shinden, Hidaka-cho, Iruma-gun, Saitama Prefecture (now Hidaka-shi, Saitama Prefecture). |
| June 1992 |
Osaka sales office opens in Nishi-nakanoshima, Yodogawa-ku, Osaka, strengthening sales for the Kansai area. |
| January 1993 |
Kanazawa Technology Center opens in Tomizu-cho, Kanazawa-shi, Ishikawa Prefecture. |
| June 1993 |
Shanghai SIGMA KOKI Co., Ltd. established for mass porduction of laser-related optical products. |
| August 1994 |
In a move seeking to expand sales, Tokyo sales office relocated to larger facilities at Higashi-nippori, Arakawa-ku, Tokyo. |
| July 1995 |
OptoSigma Corporation established, primarily for the manufacture and sales of optical equipment in the US. |
| October 1995 |
New Technology Center opens in Yatsukaho, Matto-shi, Ishikawa Prefecture.The new facility integrates the Kanazawa Technology Center. |
| November 1996 |
Company stock registered with the Japan Securities Dealers Association for over-the-counter stock offering. Capital increased to 999,750,000 yen through sales of stocks to the general public. |
| January 1998 |
New factory for Shanghai SIGMA KOKI Co., Ltd. (in Shanghai, China) constructed, and operations launched. |
| May 1998 |
SIGMAKOKI establishes Tac Coat Co., Ltd. in IIda-shi, Nagano Prefecture through a joint venture with Natsume Optical Corporation to expand production system for optical coatings. |
| July 2000 |
Technology Center obtains ISO 14001: 1996 certification. |
| February 2001 |
Head office and factory obtains ISO 9001:1994 certification. |
| March 2001 |
- Technology Center obtains ISO 9002:1994 certification.
- Noto Plant obtains ISO 9001:1994 certification.
- SIGMA KOKI acquires Tokyo head office building (in Sumida-ku, Tokyo) to expand and strengthen the sales promotion and head office functions.
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| July 2001 |
SIGMAKOKI signs basic agreements with Hamamatsu Photonics K.K. concerning capital and business alliances. |
| June 2002 |
The Sales and Administration headquarters relocated to Tokyo head office building (in Sumida-ku, Tokyo). |
| September 2002 |
Tokyo head office obtains ISO 9001:2000 certification. |
| October 2002 |
Technology Center obtains ISO 9001:2000 certification. |
| January 2003 |
Tokyo head office, head office and factory, and Osaka sales office obtain ISO14001:1996 certification. |
| July 2003 |
Noto Plant obtains ISO 14001:1996 certification. |
| September 2003 |
Osaka sales office obtains ISO 9001:2000 certification. |
| December 2004 |
In accordance with establishment of JASDAQ security market, delist the over-the-counter stock offering and reregister stocks to JASDAQ securities exchange Inc. |
| November 2005 |
Expand facility of Shanghai SIGMA KOKI Co., Ltd. (in Shanghai, China) and start manufacture of optical hardware product. |
| February 2006 |
Unifying the Quality Control and the Environmental Conservation management system together and obtained integrated certificate of ISO9001 : 2000 and ISO14001 : 2004 in all domestic facilities. |
| June 2007 |
Kyushu sales office opens in Hakata-ku, Fukuoka. |
| November 2010 |
OptoSigma Corporation relocated to larger facility, upgraded production and strengthen the sales operation. |
| December 2013 |
OptoSigma Europe S.A.S. established in France, primarily for the sales of optical equipment in Europe. |
| January 2014 |
The SIGMAKOKI Group published the new unified global brand “OptoSigma”. |
| December 2015 |
Head office/Hidaka plant acquired approval for Medical Device Manufacturing. |
| June 2017 |
Engineering division is newly established. The company has reorganized into four divisions of Production, Engineering, Sales and Administration. |
| November 2017 |
The Quality Control and the Environmental Conservation management system has updated integrated certificate of ISO9001 : 2015 and ISO14001 : 2015 in all domestic facilities. |
| March 2019 |
OptoSigma Southeast Asia Pte. Ltd. established in Singapore, primarily for the sales of optical equipment in the Southeast Asian market. |
| April 2020 |
Expand facility of Head office/Hidaka plant, SIGMAKOKI CO.,LTD. And expand equipment for optics, coating products, and optical system products. |
| April 2022 |
In accordance with the market restructuring of the Tokyo Stock Exchange, SIGMAKOKI changed its listing on the Tokyo Stock Exchange from the JASDAQ security market to the Standard Market Segment. |
| July 2023 |
SIGMAKOKI Co,.Ltd. establishes LMS Co., Ltd in Hakusan-shi, Ishikawa Prefecture through a joint venture with LION POWER Co.,Ltd. and Minato Optical Industry Co., Ltd. to develop, manufacture and sell medical devices for the medical and healthcare industries. |
| July 2023 |
Two new factory buildings were added to the Technology Center to increase production capacity and improve development capabilities.
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| October 2024 |
The existing factory building at the Noto plant was expanded and renovated. This included the creation of an opto-mechanical factory for the production of optical elements, coating products, and optical system products, as well as the enhancement of production capacity for optical-mechanics. |
