What Prime Polymer does

Prime Polymer Co., Ltd. (株式会社プライムポリマー) is a Japanese polyolefin resin manufacturer founded in 2005 as a joint venture subsidiary of Mitsui Chemicals Co., Ltd. and Idemitsu Kosan Co., Ltd. The company produces polypropylene (PP) and polyethylene (PE) resins across two product families: the Prime Polypro® general-purpose homopolymer line (with branded specialty extensions including MOSDIO® glass-fiber-reinforced PP, Polyfine® sliding PP, and THERMOFIL®) and a PE portfolio spanning Hi-Zex® HDPE, Neo-Zex®/Ult-Zex® solution-process LLDPE, and the metallocene-catalyzed Evolue®/Evolue®H family. Technology is anchored in proprietary metallocene catalyst chemistry and three polymerization platforms (slurry, gas-phase, solution). Prime Polymer operates five domestic Japanese factories (including co-located sites within Mitsui Chemicals' Ichihara and Osaka factories and Idemitsu Kosan's Chiba Works) with Prime Polypro® nameplate capacity of 1,260 kt/year, plus eight overseas manufacturing bases across North America, Mexico, Thailand, China, India, Brazil, the Netherlands, and Singapore for advanced composites.

The company sells primarily B2B to automotive OEMs and Tier 1 suppliers (lightweight structural and interior components), packaging manufacturers (food, medical, and pharmaceutical packaging), consumer goods makers, medical device producers, and industrial/infrastructure customers (pipes, wire coatings). Distribution runs through direct sales offices in Tokyo, Nagoya, and Osaka, the Prime Polymer Logistics Council (including two dedicated bulk container ships, RORO vessels, and rail), and overseas subsidiaries. Pricing is quote-based and not publicly disclosed. Sustainability positioning is increasingly central: the Re'PRM® recycled-resin brand and Prasus® mass-balance biomass/chemically-recycled resin brand — including the first Eco Mark certification under mass balance in Japan achieved with the Japanese Consumers' Co-operative Union in 2023 — drive a premium sustainable-product revenue stream alongside the conventional resin business.

Prime Polymer is privately held, with 501-1,000 employees and global revenue not publicly disclosed. Recent strategic activity centers on the 2026-07-01 domestic polyolefin business integration and continued build-out of the circular-economy product portfolio. The R&D function is concentrated at the Sodegaura site, housing the Basic Technology, Industrial Packaging, and Automotive Materials Research Institutes.

Name

Prime Polymer

Legal name

株式会社プライムポリマー

Website

https://primepolymer.co.jp

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Prime Polymer is a Japanese polyolefin resin manufacturer (subsidiary of Mitsui Chemicals) producing polypropylene and polyethylene under brands such as Prime Polypro®, MOSDIO®, Evolue®, and Hi-Zex® for automotive, packaging, medical, and industrial customers across Japan and eight overseas manufacturing bases.

Ownership category

akta.pro rank

Product category

Polyolefin Resins

NAICS

Plastics Material and Resin Manufacturing (325211), Resin, Synthetic Rubber, and Artificial and Synthetic Fibers and Filaments Manufacturing (3252)

SIC

Plastic Materials, Synth Resins & Nonvulcan Elastomers (2821)

akta.pro primary industry

Polyolefins (PE, PP) (IMAEADAD)

akta.pro secondary industries

Specialty Polymers & Resins (Engineered Materials) (IMAEABAK), Reprocessed Resin & Recycled Polymer Compounding (PCR/PIR Compounds) (IMANAMAG)

Keywords

• Polyolefin manufacturing
• Polypropylene resin
• Polyethylene production
• Recycled polymer products
• Glass fiber reinforced PP

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices15 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Infrastructure

Revenue model

1. Polyolefin resin sales: Prime Polymer generates revenue through the manufacture and sale of polypropylene (PP) and polyethylene (PE) resins under branded product lines (Prime Polypro®, Hi-Zex®, Neo-Zex®, Evolue®, etc.) to industrial customers across automotive, packaging, medical, and consumer goods sectors.
2. Recycled resin products (Re'PRM®): Sale of high-value-added recycled polypropylene and polyethylene products under the Re'PRM® brand, contributing to circular economy revenue streams from material recycling.
3. Sustainable/biomass resin products (Prasus®): Revenue from Prasus® brand products utilizing new feedstocks (biomass naphtha, chemical recycling plastics), sold at premium to conventional products for sustainable packaging applications.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

Prime Polymer manufactures and sells polypropylene (PP) and polyethylene (PE) resins for industrial customers across automotive, packaging, medical, and general industrial applications. Its portfolio spans commodity grades as well as specialty grades such as glass fiber reinforced PP and recycled polymer products designed for circular economy uses.

Product overview

Prime Polymer is a polyolefin resin manufacturer producing two main polymer families — polypropylene (PP) and polyethylene (PE) — alongside circular economy product lines. The PP portfolio includes プライムポリプロ® (general-purpose homopolymer), MOSDIO® (glass fiber reinforced PP including long-fiber variants), and ポリファイン® (high-functionality sliding PP). The PE portfolio spans ハイゼックス® (HDPE), ネオゼックス®/ウルトゼックス® (linear LDPE via proprietary solution polymerization), and エボリュー®/エボリュー®H (metallocene-catalyzed LLDPE and medium/high-density PE). Sustainability offerings include Prasus® (new feedstock products using bio-naphtha or chemically recycled feedstocks via mass balance method) and Re'PRM® (high-value-added mechanical recycled resin products). The company operates five domestic factories and multiple international production sites serving automotive, medical, packaging, industrial, and consumer goods sectors.

Differentiator

Problem solved

Functional benefit

Brands

• Re'PRM®: Recycling brand with 'Recycle, Reuse, Reduce, Reborn' concept for high-value recycled products
• Prasus®
• プライムポリプロ®
• MOSDIO®
• ポリファイン®
• ハイゼックス®
• ネオゼックス®
• ウルトゼックス®
• エボリュー®
• エボリュー®H
• THERMOFIL®

Products and services

• Polypropylene (PP) resins Polypropylene resin grades sold to industrial manufacturers for use in automotive components, packaging, medical devices, and other industrial applications.
• Polyethylene (PE) resins Polyethylene resin grades sold to industrial manufacturers for packaging, industrial, and related applications.
• Glass fiber reinforced polypropylene (PP) Specialty polypropylene grade reinforced with glass fiber, designed for higher-performance industrial applications requiring enhanced mechanical properties.
• Recycled polymer products Recycled polyolefin products developed for circular economy and sustainability-focused industrial applications.

Quantifiable outcome

• GHG emissions reduction target: 30%+ by FY2030 vs FY2013 baseline
• +3 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Nine partnerships are on record, tiered minor, core and flagship.

• Tokuyama Polypropylene (徳山ポリプロ株式会社)minorOthers · 1 July 2026Related company within the Japanese polyolefin industry. Listed in Prime Polymer's link directory as a related enterprise.
• Mitsui Chemicals (三井化学株式会社)coreStrategic or Co-development PartnerParent company of Prime Polymer. Production facilities (Ichihara, Osaka) operate within Mitsui Chemicals factory compounds. Joint R&D on catalyst technology, production processes, and new product development. Shared sustainability systems including Responsible Care activities, quality management, and environmental reporting.
• Idemitsu Kosan (出光興産株式会社)coreStrategic or Co-development PartnerPartner company hosting Prime Polymer's Anesaki Factory within the Idemitsu Kosan Chiba Works site. Co-location enables shared infrastructure and operational synergies in petrochemical manufacturing.
• Japan Petrochemical Industry Association (石油化学工業協会)minorOthersIndustry association for petrochemical companies in Japan. Prime Polymer is a member for industry engagement and policy coordination.
• Plastic Waste Management Institute (プラスチック循環利用協会)minorOthersIndustry organization promoting plastic recycling and circular economy in Japan. Prime Polymer participates in PWMI activities to advance its circular economy initiatives (Re'PRM®).
• Japan Plastic Industry Federation (日本プラスチック工業連盟)minorOthersIndustry federation for plastic manufacturers in Japan. Prime Polymer is a member for industry representation.
• Japanese Consumers' Co-operative Union (日本生活協同組合連合会)flagshipStrategic or Co-development PartnerPrasus® mass-balance biomass PP adopted for food packaging by Japanese consumer co-op. This partnership achieved the first Eco Mark certification in Japan under the mass balance approach, demonstrating Prime Polymer's sustainable packaging solutions.
• Natural Lawson (ナチュラルローソン)flagshipStrategic or Co-development PartnerPrasus® mass-balance biomass PE and chemical recycling PE adopted for reusable shopping bags at Natural Lawson convenience stores, advancing sustainable retail packaging.
• D&DEPARTMENT PROJECTminorStrategic or Co-development PartnerPrasus® biomass PP adopted for D&DEPARTMENT PROJECT's Plamu cup, a sustainable lifestyle product designed by the long-standing design initiative.

Scale indicators9 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Braskem: Americas-focused PP producer with a strong biopolymers franchise (I'm green™ bio-based PE, bio-based PP). Comparable on PP-centric product mix and bio-based/mass balance polymer strategy targeting packaging and consumer goods.
• SABIC: Saudi petrochemicals major with extensive PP, HDPE, LLDPE, and engineered polyolefin offerings serving packaging, automotive, and infrastructure globally. Comparable as a vertically integrated polyolefin producer with metallocene and high-performance specialty grades.
• ExxonMobil Product Solutions: Integrated petrochemicals business producing Vistamaxx, Exceed, Achieve branded PP/PE and performance polymers for packaging, automotive, and hygiene applications. Comparable scale and proprietary catalyst technology positioning.
• Sumitomo Chemical: Japanese chemical major with PP, HDPE, LLDPE and engineered polymer (SumikaSuper, Sumikathene) offerings for automotive and packaging customers. Most direct Japanese-headquartered competitor to Prime Polymer across resin portfolio and customer base.
• TotalEnergies Petrochemicals: Integrated polyolefins supplier offering PP, HDPE, LLDPE (Lummus, Borstar technologies) alongside circular polymers (re:source). Comparable on integrated petrochemical value chain and emerging recycled-grade PP/PE portfolio.
• Borealis: Austrian-headquartered polyolefin specialist with PP, PE, and circular-economy product lines (Borcycle, Bornewables) directly analogous to Prime Polymer's Re'PRM and Prasus offerings. Comparable on technology-driven specialty differentiation and circular polymer strategy.
• Lyondellbasell: One of the world's largest polyolefin producers with comparable PP and PE resin portfolios across packaging, automotive, and industrial end markets. Directly comparable on product mix, B2B sales model, and global manufacturing footprint.
• INEOS Olefins & Polymers: Major global producer of polyethylene and polypropylene resins for packaging, durables, and industrial applications. Comparable on broad PP/PE portfolio, B2B direct-to-converter sales, and global manufacturing scale.
• Formosa Plastics Corporation: Taiwan-based petrochemicals producer with extensive PP, HDPE, LLDPE capacity serving Asian packaging, automotive, and industrial markets. Comparable on commodity-to-specialty PP/PE grade coverage and Asian manufacturing footprint.

Broad incumbents

• Mitsui Chemicals: Parent company of Prime Polymer; Mitsui Chemicals operates the broader Japanese petrochemicals and specialty chemicals portfolio (polyurethanes, performance polymers, basic chemicals) within which Prime Polymer's PP/PE business sits as the dedicated polyolefin arm.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance5 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries8 records

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 Prime Polymer