Renias

What Renias does

Renias Co., Ltd. (株式会社レニアス) is a Japanese manufacturer specializing in polycarbonate resin glazing products and aluminum processing, founded in 1976 as Nishi-Nihon Gasket and rebranded to Renias in 1991. The company operates an integrated one-stop production system at its Mihara, Hiroshima headquarters, anchored by world-class large-scale injection compression molding (up to 2,000mm × 1,500mm), with complementary capabilities in silk-screen printing, 3D printing, hot-press forming, hard coating, lamination, trimming, and aluminum sash assembly. A second domestic manufacturing base at Oyama, Tochigi Prefecture (established 2015) handles aluminum window frame production for buses and specialty vehicles, and a wholly-owned US sales subsidiary — RENIAS AMERICA, INC. in Schaumburg, Illinois (established 2017) — supports North American customer development.

The proprietary RENCRAFT® product line is the commercial core, offered in three coating tiers — NHC (standard), SHC (super hard coat), and SHCα (super hard coat alpha) — providing escalating levels of scratch resistance (Taber ΔHaze as low as 1.2% for SHCα vs. 52% for uncoated PC), weatherability (up to 1,080 hours UV resistance, ~18 years equivalent), and optical clarity. Functional feature variants include integrated heating (transparent conductive film), anti-reflection (down to 0.7% reflectance), infrared cut, dimming (10.2%–51.3% variable transmittance), anti-fouling, and UL752 Level III bulletproof performance. The company serves enterprise OEMs across five primary verticals: construction machinery, forestry equipment (where Renias holds ~60% global market share in cabin windows), mobility/EV, bus manufacturing, and railway vehicles, with secondary exposure to security and defense applications. It operates a B2B direct sales model with custom quote-based pricing, multi-year contracts, and co-development engagements; pricing is not publicly disclosed.

For FY2024, Renias reported net sales of approximately 7.01 billion JPY (~$47M USD) with 159 employees, generating revenue per employee of roughly ¥44M. The company maintains R&D partnerships with Hiroshima University, Toyohashi University of Technology, and Japan's National Defense Academy, and holds international safety certifications including ECE 43R, JIS R3211, ANSI Z26.1 (DOT-1074), and UL752 Level III. It has received the 2026 Laser Society of Japan Excellence Award for its SHC technology and consecutive S-Class Energy Conservation ratings in 2023 and 2024.

Name

Renias

Legal name

株式会社レニアス (Kabushiki Kaisha Renias)

Website

https://renias.co.jp

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

1–10 employees

Short description

Renias is a Japanese manufacturer of polycarbonate resin glazing (RENCRAFT®) and aluminum window frames, serving enterprise OEMs in construction machinery, forestry equipment (~60% global market share in cabin windows), mobility, buses, and railway vehicles. Founded 1976, based in Mihara with US sales operations.

Ownership category

akta.pro rank

Product category

Industrial Polycarbonate Glazing

NAICS

Plastics and Rubber Products Manufacturing (326), Plastics Product Manufacturing (3261)

SIC

Miscellaneous Plastics Products (3080)

akta.pro primary industry

Automotive Exterior Trim & Appearance Components Manufacturing (Moldings/Badges/Grilles/Chrome/Cladding) (IMACAKAE)

Keywords

• Polycarbonate resin glazing
• Aluminum window frames
• Construction machinery components
• Forestry machinery cabins
• Safety glass manufacturing

Headquarters

HQ city

Mihara

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Polycarbonate Resin Product Sales: Sales of proprietary polycarbonate resin glass products under the RENCRAFT® brand, including roofing, windows, light covers, and custom specialty components. Sold directly to OEM manufacturers (construction machinery, forestry machinery, buses, railway vehicles, mobility/EV). Net sales of 70.1 billion JPY (2024 fiscal year). Domestic market share #1 in multiple categories. Growing international revenue share.
2. Aluminum Processing Product Sales: Sales of aluminum sash and door components, primarily for buses and specialty vehicles. Aluminum frame assembly and window frame products manufactured at the Oyama plant. Contributes to strong market position in domestic bus window frame assembly market.
3. Custom Design & Manufacturing Services: Custom product design, prototyping, and co-development services for enterprise customers in construction machinery, forestry, mobility, and security sectors. Involves close collaboration between sales, development, and manufacturing teams to deliver tailored solutions.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

Renias manufactures and sells polycarbonate resin glass products under the proprietary RENCRAFT® brand — including hard-coated, weather-resistant, and specialty-function variants — along with aluminum sash window frames for buses and specialty vehicles. Products are custom-designed and supplied to OEM customers in construction machinery, forestry machinery, mobility/EV, bus, and railway vehicle industries through integrated one-stop production (injection compression molding, coating, lamination, trimming, assembly).

Product overview

Renias is a polycarbonate and aluminum processing company offering RENCRAFT® as its core product line of polycarbonate resin glass products. The product portfolio centers on RENCRAFT® with multiple performance tiers (NHC standard coat, SHC super hard coat, and SHCα super hard coat alpha), each providing escalating levels of scratch resistance, weatherability, and optical clarity. RENCRAFT® products are complemented by functional enhancements including heating, anti-reflection, anti-fouling, infrared cut, dimming, and bulletproof capabilities. Renias also manufactures aluminum sash and door products for buses and specialty vehicles. Applications span construction machinery, forestry equipment (holding ~60% global market share), mobility/EV vehicles, buses, and railway vehicles. The company operates integrated polycarbonate resin production (world-class large-scale injection compression molding) at its Mihara factory and aluminum window frame assembly at its Oyama factory, with products meeting international safety glass standards (ECE 43R, JIS R3211, ANSI Z26.1).

Differentiator

Problem solved

Functional benefit

Brands

• RENCRAFT®: Proprietary polycarbonate resin glass product line with high scratch resistance, weatherability, and optical properties. Offered in multiple variants: NHC (standard coat), SHC (super hard coat), and SHCα (super hard coat alpha). Used in construction machinery, forestry equipment, mobility, buses, and railway vehicles.

Products and services

• RENCRAFT® Polycarbonate Resin Glass Proprietary brand of high-performance polycarbonate resin glass products offering superior scratch resistance, weatherability, and optical properties for OEM manufacturers in construction machinery, forestry equipment, mobility, buses, and railway vehicles.
• Aluminum Sash Window Frames for Buses and Specialty Vehicles Aluminum sash window frames for buses and specialty vehicles, supporting window widths from approximately 520mm to 1,850mm, featuring high water-tightness performance. Manufactured at the Oyama plant.
• RENCRAFT® Material Sheet (Product Catalog) Reference catalog detailing RENCRAFT® material grades, performance specifications, and available coating variants for OEM customer design-in.

Named customers6 records

Segments6 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Partnerships

Three partnerships are on record, tiered core.

• 広島大学 (Hiroshima University)coreStrategic or Co-development PartnerJoint research collaboration on transparent sound barrier development and microhardness measurement technology development. The partnership combines RENIAS's polycarbonate processing expertise with Hiroshima University's research capabilities to develop advanced transparent barrier products.
• 豊橋技術科学大学 (Toyohashi University of Technology)coreStrategic or Co-development PartnerJoint research on superhydrophobic surface treatment for hard coat surfaces. Collaborative effort to develop advanced water-repellent surface technologies applicable to polycarbonate glazing products.
• 防衛大学校 (National Defense Academy of Japan)coreStrategic or Co-development PartnerJoint research on ultra-hard surface treatment for hard coat technology. Defense applications research contributing to the development of super-hard coat technology for high-durability polycarbonate products.

Scale indicators10 records

Recent moves10 records

Expansion highlights6 records

Broad incumbents

• SABIC: Saudi-headquartered global petrochemicals and engineering plastics producer (including LEXAN-equivalent polycarbonate resins) serving automotive, construction, electronics, and security end markets. Adjacent to Renias as a polycarbonate upstream supplier into the same downstream OEM glazing applications.
• Covestro AG: German-headquartered global polycarbonate resin and compounds producer with downstream specialty applications in automotive glazing, electronics, and construction. Comparable to Renias as a polycarbonate value-chain incumbent; serves overlapping end markets (auto, bus, rail) but at the resin-supply level rather than finished glazing.
• Pilkington (NSG Group): Global automotive and architectural glass manufacturer (parent of the Pilkington brand) with vehicle glazing, value-added glass, and emerging polycarbonate capabilities for buses, rail, and passenger vehicles. Comparable to Renias on global OEM vehicle-glazing supply but dominated by glass rather than resin.
• Kuraray Co., Ltd. Japanese specialty chemicals company producing polycarbonate, EVAL (EVOH) resins, and PVB interlayers used in laminated safety glass for automotive and architectural applications. Comparable to Renias on the polycarbonate and laminated-glass materials side of the same Japanese OEM value chain.
• Magna International: North American tier-1 automotive supplier with exterior systems (including polycarbonate glazing for sunroofs and panoramic roofs) within a much broader powertrain, seating, and ADAS portfolio. Comparable to Renias on PC glazing technology and OEM-direct supply, but vastly broader in product scope and customer base.
• Teijin Limited: Japanese materials company with polycarbonate resins, composites, and aramid fibers serving automotive, electronics, and industrial markets. Closest Japanese-headquartered peer to Renias in polycarbonate materials expertise and Japan-OEM relationships; broader scope into chemicals, pharma, and IT.

Direct peers

• Yanfeng: Chinese tier-1 supplier of automotive interior and exterior trim (including polycarbonate instrument panel, console, and increasingly glazing components) to global and Chinese OEMs. Comparable to Renias on PC-and-trim module supply to vehicles, but with a China-centric footprint and substantially larger scale.
• Webasto SE: German tier-1 automotive supplier specializing in sunroofs, panoramic roof systems, and polycarbonate glazing for passenger vehicles. Directly comparable to Renias on polycarbonate vehicle-glazing expertise, OEM sales motion, and global tier-1 supply relationships; Webasto operates at considerably larger scale.
• Samvardhana Motherson: Indian-headquartered global automotive interior and exterior systems supplier with polycarbonate glazing and trim modules for commercial vehicles and passenger cars. Direct peer to Renias in supplying polycarbonate and laminated glazing modules to commercial-vehicle and mobility OEMs at global scale.
• AGC Automotive (Asahi Glass Co., Ltd.): Japanese-headquartered global vehicle glazing manufacturer with polycarbonate product lines serving buses, rail, and passenger cars. Comparable to Renias on resin-based and laminated glazing, automotive safety-glass certifications (ECE 43R, ANSI Z26.1 analogues), and OEM-direct sales in mobility and railway.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/renias-america-inc

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries1 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 Renias