SIGMAKOKI CO., LTD.
7713・Standard Market・Precision Instruments
Business
Sigma Koki Co., Ltd. is a comprehensive optical products manufacturer founded in 1977, positioning itself as an "Optical Solutions Company." Its business consists of two segments: the "Component Parts Business," comprising Basic Optical Equipment, Automated Application Products, and Optical Elements & Thin-Film Products; and the "System Products Business," comprising optical modules, optical units, optical devices, and other products. Its products are widely utilized across a broad range of fields, from basic research and development research to industrial sectors such as semiconductors, FPDs (flat panel displays), medical, defense, and aerospace. The company operates globally through subsidiaries at five domestic and overseas locations (the United States, Europe, Southeast Asia, Germany, and China), supplying products to the global market under the "OptoSigma" brand. Consolidated net sales for FY2025 (ended May 2025) were ¥11,581 million.
Business Model
In the Component Parts Business, the company adopts a store-less model that sells a wide variety of standard products nationwide and worldwide via web and print catalogs, securing stable mass-sales revenue. Meanwhile, in the System Products Business, the company provides high-value-added optical modules and equipment on a build-to-order basis in response to customer needs in the research and industrial fields. It offers a consistent one-stop service ranging from custom-order support to medium-volume OEM production, differentiating itself by integrating optical technology, machining, electrical design, and software development.
Company Strengths
Since first publishing a comprehensive catalog for standard products in 1984, the company has offered a wide variety of standard products spanning Basic Optical Equipment, Automated Application, and Optical Elements & Thin-Film Products through web and print catalogs. Leveraging a global web catalog system, the company has built a stable supply structure for the global market through five overseas subsidiaries in the US, Europe, Southeast Asia, Germany, and China.
At the end of FY2025 (ending May 2025), the equity ratio stood at 86.9%, and while interest-bearing debt was ¥204 million, cash and cash equivalents at period-end totaled ¥3,284 million, maintaining virtually debt-free management. Of total assets of ¥20,340 million, net assets reached ¥17,769 million, giving the company a robust financial base capable of withstanding sudden changes in the external environment.
Building on long-standing relationships of trust with universities, national and public research institutes, and national research and development agencies, the company reflects cutting-edge optical technology needs in its product development. In FY2025 (ended May 2025), R&D expenditure totaled ¥335 million, comprising ¥208 million for the Component Parts Business and ¥127 million for the System Products Business, and the company continues to develop new products such as non-magnetic components, mirrors for femtosecond lasers, and medical devices.
ENVALITH's Perspective
Performance Trend
Revenue peaked at ¥11,368 million in FY2023 (ended May 2023) and has since remained largely flat, coming in at ¥11,439 million in FY2026 (ending May 2026), down 1.2% year on year. The company was affected by deteriorating conditions in the electronic components and semiconductor-related electronics industry through the third quarter, but conditions recovered from the fourth quarter onward. Operating profit rose 4.3% year on year to ¥1,179 million, marking the first increase in two periods, driven by the effects of price revisions and cost reductions. However, net income fell 15.7% year on year to ¥831 million, due to the disappearance of the prior period's extraordinary gains (subsidy income and reversal of provisions totaling ¥116 million) and the recording of a valuation loss on investment securities (¥53 million) in the current period. Operating cash flow improved substantially to ¥909 million from ¥379 million in the previous period. For FY2027 (ending May 2027), the company forecasts revenue of ¥11,880 million and operating profit of ¥1,355 million, representing double-digit profit growth.
Growth Strategy
Strengthening optical solution proposal sales and expanding into growth markets and global production capabilities
Deploying proposal-based sales activities for custom-order products and OEM products targeting the electronics, bio & medical, defense, telecommunications, quantum, aerospace, and nanotechnology industries. Also promoting measures to raise brand awareness, such as exhibiting at major overseas trade shows, with the aim of expanding revenue.
Newly established and consolidated Shanghai Sigma Comprehensive International Trading Co., Ltd. (a procurement company in China) during the current fiscal year, strengthening production outsourcing and procurement functions in China. Promoting optimization of the global supply chain in coordination with sales subsidiaries in the U.S., Europe, and Southeast Asia.
The effect of the price revision implemented in January 2025 contributed throughout the current fiscal year, helping to improve gross profit. Going forward, the company plans to continue implementing price pass-through, primarily for catalog products, to absorb rising raw material and labor costs and improve profit margins.
Continuing to promote human capital investment, including personnel recruitment and capability development, as well as R&D investment for the introduction of high-precision processing and inspection equipment and the development of new products and technologies. R&D expenses rose to ¥362 million (from ¥335 million in the previous fiscal year), reflecting an upward trend, strengthening the company's capability to respond to next-generation optical technologies.
Last updated: July 17, 2026