Seiren designs lightness and feel into car-seat materials
Seiren is a textile manufacturer that designs and makes car-seat coverings, airbags and clothing fabrics, among other products. For automakers, it supplies synthetic leather and fabrics for seats as well as decorative interior parts.
When someone sits in a car, the seat covering is the surface they touch. With its QUOLE synthetic leather, Seiren designs the material’s weight as well as its appearance and feel.
Adapting the surface to how it will be used
Making a material into a seat covering
Seiren keeps material production, cutting and sewing within its automotive-materials group operations.
Yarn becomes a textile
Manage yarn, knitting or weaving, and processing.
Finish it to a shape
Cut and sew the textile for use in a component.
Create the surface people touch
Offer feel, color and functions suited to the application.
A simplified view of automotive-materials operations, not the layer structure of a particular QUOLE product or every production step in order. The seat illustrates a material application, not manufacture of the complete seat.
Turning material proposals into orders across regions
DATA VIEW
Automotive-materials operating profit
Actual results for the years ended March 2025 and March 2026, in ¥bn. Both bars start at zero on the same scale. The prior year has been restated to the revised segment classifications.
Year ended March 2025¥13.954bn
Year ended March 2026¥16.199bn
Source: results presentation, PDF p.9. The current year also includes automotive-related materials from NB Seiren, which became a consolidated subsidiary in January 2026.
Group consolidated sales were ¥171.765bn and operating profit ¥20.832bn. Seiren also operates in high fashion, including clothing textiles, electronics, environmental and life materials, and medical products (results presentation, PDF pp.5–6).
Investing to manufacture the next materials
CONCEPT MAP
Making a material that customers choose
A summary of the company's product descriptions and production setup, not revenue shares by function or manufacturing specifications for one product.
Interior covering materialsPropose the feel, appearance and functions automakers need
Material propertiesDevelop lightness and a soft touch
Application functionsAdd temperature control, stain resistance or breathability
Production and finishingManage yarn, processing, cutting and sewing
THE VIEW AFTER THE NUMBERS
What the numbers suggest
Seiren supplies automakers with covering materials and the ability to tailor their feel and functions. The weight comparison with genuine leather and the manufacturing-solvent figures show work on both the material and the process that produces it.
Automotive-materials sales reached ¥115.258bn in the year ended March 2026. Proposing materials, winning orders for vehicle models, and managing production, quality and costs are the activities behind the surface a passenger touches.
Tsubakimoto uses chain geometry and motion to build equipment that pushes loads upward. ZIP CHAIN meshes two chains into a rigid column, then separates them for storage in a compact case. Its wider Chain and Motion Control businesses nevertheless had very different operating margins in the year ended March 2026: 15.1% and 4.1%. Their April 2026 combination aims to extend product combinations into customer proposals and after-sales service. Its earnings effects still need to be established through future results.
