SIGMA KOKI CO.,LTD.

Sigma Koki (シグマ光機) is a corporate group pursuing its goal of becoming a “light solutions company” engaged in the development, production and sale of optical component parts and optical system products. Its main customers include research and development institutions, universities and companies in industrial fields. Through orders and deliveries in Japan and overseas, the group also handles custom-made products and is pursuing a position as an integrated manufacturer providing light solutions based on cutting-edge optical technologies. Its global brand is unified under the name OptoSigma, and it has local corporations and subsidiaries throughout the United States, Europe and Asia. Through multiple affiliated companies and subsidiaries, the group develops, manufactures and sells component products, automated application products, optical elements, thin-film products and optical system products. In 2023, LMS Co., Ltd. was established in Hakusan, Ishikawa, through a joint investment by Lions Power Co., Ltd. and Minato Optical Industry Co., Ltd. In 2023, 2 new factory buildings were added to the Technical Center to increase its production capacity and development capabilities. In October 2024, the existing factory building at the Noto Factory was expanded and renovated. In April 2025, OptoSigma Germany GmbH was established in Germany as part of efforts to strengthen the group's European operations. In October 2025, 上海西格瑪総合国際貿易有限公司 became a subsidiary, expanding the group's local import and export operations.