ENVALITH
セーレン株式会社 logo

SEIREN CO.,LTD.

3569・Prime Market・Textiles & Apparels

Official website
セーレン株式会社 logo
SEIREN CO.,LTD.3569

Business

Seiren Co., Ltd. is a textile manufacturer founded in 1923 and based in Fukui, forming a group consisting of the company itself, 26 consolidated subsidiaries, and 1 affiliated company. In its core Vehicle Materials business (approximately 67% of consolidated net sales), the company manufactures and sells automotive seat materials and airbags at 13 sites in Japan and overseas, serving major domestic automakers such as Toyota and Honda as well as automakers in North America, Asia, and Europe. The company also operates four other segments—High Fashion, Electronics, Environment & Lifestyle Materials, and Medical—and is advancing diversification into high-value-added areas such as its proprietary digital production system "Viscotecs®" and semiconductor- and space-related materials derived from textile technology. Consolidated net sales for FY2026 (ending March 2026) reached a record high of ¥171,765 million.

Business Model

The company combines an "integrated production system" spanning raw yarn manufacturing through sewing, processing, and sales with its proprietary digital production system "Viscotecs®" to achieve small-lot, short-lead-time, inventory-less manufacturing. In Vehicle Materials, the company secures BtoB revenue through direct supply to domestic and overseas automakers, while diversifying its revenue portfolio through high-margin segments such as Electronics and Medical. By continuing to invest ¥5,920 million in R&D expenses (FY2026 (ending March 2026)) and maintaining technological superiority, the company is pursuing a high-value-added model that avoids price competition.

Company Strengths

Viscotecs® is a proprietary in-house system that integrates planning, manufacturing, and sales into a consistent distribution function combined with an integrated production system, enabling small-lot production, short delivery times, and inventory-free operations. It has been horizontally expanded across multiple domains, including apparel, vehicle interiors, and decoration of non-woven materials, forming a technical entry barrier that is difficult for competitors to imitate in a short period.

The company has manufacturing and sales sites in the United States, Mexico, Brazil, Thailand, Indonesia, India, China, and Hungary, covering nearly all major automobile-producing countries. In FY2026 (ending March 2026), Vehicle Materials sales reached ¥115,258 million with an operating margin of 14.1%, with the globally diversified production system contributing to earnings stability.

In the Electronics segment, the company offers high-value-added products derived from fiber technology, including conductive yarn for dust-proof clothing "Beltron", wiping cloth "Zavina", silicon wafer oxide film processing, and satellite manufacturing. In FY2026 (ending March 2026), the segment's operating margin reached 23.1%, the highest among all segments, with continued R&D investment of ¥849 million.

ENVALITH's Perspective

The high-dependence structure in which the Vehicle Materials segment accounts for approximately 67% of consolidated net sales and approximately 78% of operating profit remains unchanged. The FY2027 (ending March 2027) forecast anticipates a decline in profit, with ordinary income down 4.1% year on year and net income down 3.8%, and US trade policy (tariffs) and geopolitical risks affecting earnings at the North American and Mexican operations are viewed as the largest downside risk. As an external factor, the continuation of a weak yen has also served to support yen-converted revenue from overseas operations, so changes in foreign exchange trends also warrant attention.

The Electronics segment posted outstanding growth in FY2026 (ending March 2026), with net sales up 21.9% year on year and operating profit up 67.2%. Expanding generative AI data center investment, a recovery in semiconductor demand, and growth in the space-related market have served as tailwinds in the market environment, and it is commendable that the company's own proprietary technological advantages (Beltron, Zavina, etc.) underpin its differentiation. On the other hand, it will be necessary to monitor the sustainability of this growth, including risks from demand volatility in products for game consoles and mobile devices, and whether the contribution from satellite-related sales was a one-time factor.

The company's forecast for FY2027 (ending March 2027) calls for increased revenue, with net sales of ¥190,300 million (up 10.8% year on year), while projecting a decline in profit, with ordinary income of ¥21,100 million (down 4.1% year on year) and net income of ¥15,000 million (down 3.8% year on year). The full-year contribution from NB Seiren Co., Ltd., which was consolidated in January 2026, is expected to contribute to the increase in sales, but the recording of a special account related to business combination of ¥4,491 million, integration costs, and uncertainty over US tariff policy could weigh on profit. The early materialization of integration synergies and improved profitability across each segment will likely be the deciding factors in the market's valuation of the stock.

Growth Strategy

Expanding high-value-added businesses across four axes: IT adoption, diversification beyond apparel/textiles, globalization, and corporate structural reform

In addition to further upgrading the proprietary digital production system "Viscotecs®," the company is promoting the conversion of production plants into smart factories utilizing AI and robotics. It aims to deepen its differentiated manufacturing model characterized by small-lot production, short lead times, and inventory-less operations, thereby improving profitability in the High Fashion business and cultivating new customers.

Leveraging applied chemistry, mechanical engineering, and IT derived from textile technology, the company is promoting business expansion into growth fields such as semiconductors (Silicon Wafer Film Deposition Processing / Conductive Yarn for Dust-Proof Clothing), space (Satellite Components), and medical care. The Electronics segment achieved a 67.2% increase in profit year-on-year in FY2026 (ending March 2026), demonstrating the effectiveness of this strategy.

While responding flexibly and swiftly to changes in the international market environment, including U.S. tariff policy, the company is promoting the launch of new vehicle models and the expansion of orders at its Mexico and Asia bases. It aims to strengthen group management through optimal-location production and procurement and expand profits in emerging markets. The overseas Vehicle Materials business achieved both increased revenue and increased profit in FY2026 (ending March 2026).

In January 2026, the company made NB Seiren Co., Ltd. a consolidated subsidiary, acquiring business domains including Fibers & Non-woven Fabrics for Industrial Materials, Short Fibers for Adhesive Patches, and Sale of Raw Materials for Packaging Film & Containers. Expenditure of ¥7,539 million was invested in the acquisition of subsidiary shares, resulting in a change in the scope of consolidation. In FY2027 (ending March 2027), revenue growth is expected from the full-year contribution, although the impact of integration costs and a special provision of ¥4,491 million related to the business combination will remain.

Last updated: July 19, 2026