Kureha Gosen

Name

Kureha Gosen

Legal name

クレハ合繊株式会社

Website

https://kureha-gohsen.jp

Company type

Private

Founded year

1963

Operating status

Operating

Headcount range

101–250 employees

Ownership category

akta.pro rank

Product category

Specialty Plastics Manufacturing (Synthetic Fibers and Injection Molded Products)

NAICS

Artificial and Synthetic Fibers and Filaments Manufacturing (325220), Plastics Product Manufacturing (3261)

SIC

Miscellaneous Plastics Products (3080)

akta.pro primary industry

Industrial & Machinery Injection Molded Components (Gears, Wear Parts) (IMANAFAF)

akta.pro secondary industry

Consumer Products Injection Molding (Housewares, Toys, Personal Care) (IMANAFAE)

Keywords

• Specialty synthetic fibers
• Fluorocarbon fishing line
• Precision injection molding
• Engineering plastic products
• Industrial filter materials

Headquarters

HQ city

Tochigi

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. Synthetic Fiber Manufacturing and Sales: Manufacturing and sales of synthetic fibers made from various plastic raw materials. Products include fluorocarbon fishing line (Seaguar brand), fishing nets, industrial filter materials, brush materials, instrument strings, and other industrial materials using PVDF, PPS, PVDC and other specialty resins.
2. Injection Molding Products: General and precision injection molding services including mold design and manufacturing. Products include electronic components, automotive parts, OA machine components, connectors, antistatic parts, and consumer products like fishing line cases and spools.
3. Consumer Fishing Products: B2C sales of branded fishing line products under the Seaguar brand to anglers and fishing enthusiasts, including fluorocarbon lines, fishing nets for fisheries, and related fishing gear accessories.

Go-to-market motion2 records

Distribution channels4 records

Marketing channels3 records

Core offering

Kureha Gosen manufactures and sells synthetic fibers and injection molded plastic products derived from specialty resins. The Fiber Products Division produces fluorocarbon fishing lines under the Seaguar brand (sold B2C to anglers and commercial fisheries) and industrial fibers (KF/PVDF, KPS/PPS, Kureharon/PVDC) for filter materials, fishing nets, brush materials, and musical instrument strings. The Injection Molding Division provides precision molded parts for electronics, automotive, OA equipment, connectors, and PEEK anti-static trays for HDD manufacturing.

Product overview

Kureha Gosen is a specialty plastics processing company with two core business divisions: the Fiber Products Division and the Injection Molding Division. The Fiber Division produces fluorocarbon fishing lines under the Seaguar brand (including Seaguar Ace, Grand Max, Manmaguro, and Toughness Squid), as well as industrial fibers including KPS (polyphenylene sulfide), KF (polyvinylidene fluoride), and Kureharon (polyvinylidene chloride). The Injection Molding Division provides precision molding services including bearing retainers using innovative monofilament insertion technology, PEEK anti-static trays for HDD manufacturing, biodegradable resin products, and general purpose products like fishing line cases. The company leverages parent company Kureha's high-performance resins (PVDF, PPS) combined with its own spinning and molding technologies to deliver specialized solutions.

Differentiator

Problem solved

Functional benefit

Brands

• Seaguar (シーガー): Fluorocarbon fishing line brand launched in 1971, celebrated 50th anniversary in 2021. Products include fishing lines for general consumers, Seaguar Manbu for fisheries, and Seaguar Toughness for squid fishing.
• KPS
• KF
• Kurehalon (クレハロン)

Products and services

• Seaguar Fluorocarbon Fishing Line (シーガー) World-first fluorocarbon fishing line produced by processing PVDF fiber, offering high strength, fast sinking, low visibility underwater, and durability. Sold B2C to recreational anglers and commercial fisheries including tuna longline and squid fishing. Includes sub-product lines Seaguar Ace (1983), Grand Max (1996), Manmaguro (tuna longline), and Toughness Squid.
• KF Polyvinylidene Fluoride Fiber (KF) Polyvinylidene fluoride fiber with high chemical resistance, weather resistance, solvent resistance, high specific gravity, and mechanical properties. Used for filters, braided cords, fishing gear, and musical instrument strings (fluorocarbon guitar and violin strings). Sold B2B to industrial manufacturers.
• KPS Polyphenylene Sulfide Fiber (KPS) Polyphenylene sulfide fiber with heat resistance, chemical resistance, solvent resistance, and low elution properties. Used for filter materials, papermaking canvas, brush materials, and industrial filtration applications. Sold B2B to industrial filtration and paper manufacturers.
• Kureharon Polyvinylidene Chloride Fiber (クレハロン) Polyvinylidene chloride fiber with flame retardancy, high specific gravity, chemical resistance, and elastic recovery. Used for fishing net yarn and shoe insoles. Sold B2B to commercial net manufacturers and footwear component suppliers.
• Injection Molding Products General and precision injection molding services with in-house mold design and manufacturing. Products include electrical/electronic components (PS, PBT, PET, PC), automotive parts (PPS, PA, POM, PBT), OA machine parts (PA66, POM, PP, PC), connector parts (PBT, PPS, PA66, LCP), and antistatic parts (PEEK, PP). Sold B2B to industrial manufacturers.
• PEEK Anti-static Trays for HDD Manufacturing High-performance anti-static trays made from PEEK resin using special carbon compound technology applied to super engineering plastics. Established as world standard product for HDD manufacturing. Provides ultra-precision antistatic properties with superior flatness.
• Bearing Retainer (Monofilament Insert Molded Product) Innovative product developed by combining textile technology with injection molding, enabling automatic insertion of long fibers (monofilaments) into molds. Provides significantly improved mechanical properties for bearing retainers.
• Bio Loop Water Treatment Contact Material (バイオループ) Water treatment contact material with antibacterial properties for water filtration systems. Sold B2B to water treatment operators and industrial filtration buyers.
• Bio Ball Water Treatment Filtration Material (バイオボール) Water treatment filtration material for water filtration systems. Sold B2B to water treatment and industrial filtration buyers.
• Biodegradable Resin Molding Products Environmentally conscious biodegradable resin molded products developed as part of the company's sustainability initiatives. Sold B2B to manufacturers seeking sustainable plastic alternatives.
• General Resin Products (Fishing Line Cases, Spools, Food Containers) General purpose plastic products including fishing line cases and spools (ABS, PS) and food containers (PP, PS). Sold B2C and B2B as ancillary consumer and industrial products.

Quantifiable outcome

• Seaguar brand fishing line products have been supporting anglers for over 50 years
• +2 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• Kureha Corporation (株式会社クレハ)coreStrategic or Co-development PartnerParent company of Kureha Gosen. Develops and supplies high-performance resins including PVDF and PPS used in Kureha Gosen's fiber production. Kureha Corporation transferred fishing line (Seaguar) business rights to Kureha Gosen in 2012. Strategic relationship enables vertical integration from resin development to finished product manufacturing.

Scale indicators4 records

Recent moves13 records

Expansion highlights5 records

Direct peers

• Teijin Limited: Japanese specialty fiber manufacturer producing high-performance materials including aramid fibers and various synthetic fibers. Comparable in producing technical fibers for industrial applications, with broader product portfolio.
• Achilles Corporation: Japanese plastic products manufacturer producing industrial plastic parts and consumer products. Comparable in plastic injection molding capabilities and Japanese market focus, similar mid-sized operational scale.
• Toyobo Co., Ltd. Japanese specialty fiber and film manufacturer with comparable product portfolio including industrial fibers, films, and functional materials. Closely comparable in scale and market focus on technical/specialty fiber applications in Japan.
• Kuraray Co., Ltd. Japanese specialty chemical company with PVDC and other specialty resin products. Sits within the Kureha Group ecosystem and produces overlapping specialty materials including PVDC (Kurehalon equivalent), making it a direct material-level peer.
• Sunline Co., Ltd. Japanese fishing line manufacturer specializing in fluorocarbon and nylon fishing lines. Direct consumer-product competitor to Seaguar in the Japanese and international fluorocarbon fishing line market.

Broad incumbents

• Pure Fishing (Berkley): Global fishing tackle and line company (Berkley brand) and the dominant player in fluorocarbon fishing line globally. Direct competitor to Seaguar in the consumer fishing line market with much larger distribution and brand presence.
• Asahi Kasei Corporation: Large Japanese diversified chemical and fiber manufacturer with comparable specialty polymer and fiber capabilities. Operates at much larger scale than Kureha Gosen with broader polymer portfolio.
• Toray Industries, Inc. Global Japanese fiber and chemical conglomerate with extensive synthetic fiber portfolio including nylon, polyester, and carbon fiber. Comparable in fiber manufacturing capabilities but at much larger scale and broader market reach.
• Mitsubishi Chemical Corporation: Large Japanese chemical conglomerate producing specialty polymers, fibers, and plastic products. Comparable in producing specialty synthetic fibers and engineering plastics, though at significantly larger scale and broader portfolio.

Emerging players

• Daiwa Seiko Corporation: Japanese fishing equipment manufacturer with proprietary fishing line products. Comparable in fishing market presence but primarily a reel/rod manufacturer with line products as a complementary offering.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Kureha Gosen