Miraial

What Miraial does

Miraial Co., Ltd. (TYO: 4238) is a Japanese specialty plastics manufacturer founded in 1968 that designs and produces precision-molded high-function plastic components for the semiconductor industry. Its core product portfolio comprises wafer handling containers (300mm FOSB and FOUP, single wafer cases, and PBT/PEEK/PFA/PP cassettes from 75mm to 300mm) and high-purity PFA fluid-system fittings (KS and SB series elbows, tees, reducers), all qualified to relevant SEMI standards. Manufacturing relies on clean-room molding of fluoropolymers and super-engineering plastics, vertical insert molding via subsidiary Sanjo Seiki's proprietary machines, and ICP-MS/GC-MS contamination analysis at ppt levels.

The company operates three business segments: high-function plastic products (wafer containers and fluid systems, the core revenue driver), molding machines and automation equipment (Sanjo Seiki, vertical injection machines and turnkey systems), and precision plastic/metal machining and prototyping (Miraial Tohoku). Manufacturing is concentrated at the Kumamoto Plants (Sumiyoshi and Tominohara) for FOSB/cassette production and at Fukushima for prototyping; sales are handled through Tokyo and Kyushu Sales Offices plus Miraial (Shanghai) for China. The company employs 323 people as of January 2026 and reported FY2025 consolidated revenue of 9,582 million JPY, down 4.3% year-on-year. Miraial holds ISO 9001 and ISO 14001 certifications, claims top-tier market share in Japan for semiconductor-related plastic products, and sells B2B via direct technical sales with custom quotation rather than published pricing.

Name

Miraial

Legal name

Miraial Co., Ltd.

Website

https://miraial.co.jp

Company type

Public

Founded year

1968

Operating status

Operating

Headcount range

251–500 employees

Short description

Miraial Co., Ltd. (TYO: 4238) is a Japanese specialty plastic molder founded in 1968 that supplies precision wafer handling containers (FOSB, FOUP, cassettes) and high-purity PFA fluid-system fittings to semiconductor wafer manufacturers, fabs, and equipment makers, with vertically integrated molding machine and prototyping subsidiaries.

Ownership category

akta.pro rank

Product category

Semiconductor Plastic Components

NAICS

Plastics Product Manufacturing (3261), Plastics Pipe, Pipe Fitting, and Unlaminated Profile Shape Manufacturing (32612)

SIC

Plastics Products, Nec (3089)

akta.pro primary industry

Precision & Micro Injection Molding (IMANAFAH)

akta.pro secondary industries

Industrial & Machinery Injection Molded Components (Gears, Wear Parts) (IMANAFAF), Electrical & Electronics Injection Molded Components (Connectors, Housings) (IMANAFAD), Custom Injection Molding & Contract Manufacturing (Job Shops/CMs) (IMANAFAJ)

Keywords

• Semiconductor wafer containers
• Precision plastic molding
• Fluid system fittings
• Vertical injection molding
• Fluoropolymer components

Headquarters

HQ city

Toshima

HQ country

Japan

HQ region

Asia

Offices6 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. High-function plastic products: Mass production and sale of precision plastic molded products including wafer handling containers (FOSB, FOUP, cassettes) and fluid system components (fittings, piping). Products are sold directly to semiconductor manufacturers and equipment makers.
2. Molding machines and automation equipment: Through subsidiary Sanjo Seiki Co., Ltd., the company manufactures and sells vertical injection molding machines, molds, and automation systems. Turnkey delivery of integrated manufacturing systems.
3. Precision machining and prototyping: Through subsidiary Miraial Tohoku Co., Ltd., the company provides precision plastic and metal machining services, rapid prototyping, and vacuum casting for product development support.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Miraial manufactures precision injection-molded high-function plastic components for the semiconductor industry, including wafer handling containers (FOSB, FOUP, single wafer cases, and cassettes in 75mm-300mm sizes made from PEEK, PFA, PBT, and PP), high-purity PFA weld fittings for fluid systems (KS and SB series elbows, tees, and reducers), and square substrate carriers. Through wholly owned subsidiary Sanjo Seiki, the group produces vertical injection molding machines, metal molds, and automation devices on a turnkey basis, while subsidiary Miraial Tohoku provides precision plastic/metal machining and rapid prototyping services.

Product overview

Miraial is a manufacturer of high-function plastic products serving the semiconductor industry and other advanced manufacturing sectors. The company's core product portfolio centers on wafer handling products (FOSB, FOUP, single wafer cases, and various PBT/PEEK/PFA cassettes in multiple sizes from 75mm to 300mm) and fluid system components (KS and SB series weld fittings in PFA material). The company operates through three main business segments: the High Performance Plastic Products Business (wafer containers and fluid systems), the Molding Machine Business through subsidiary Sanjo Seiki Co., Ltd. (vertical molding machines, metal molds, and automation devices), and the Plastic and Metal Processing Business through subsidiary Miraial Tohoku Co., Ltd. (prototyping and precision machining services). Miraial's competitive differentiation lies in its ability to work with super engineering plastics like PEEK and PFA, providing integrated manufacturing from design through molding, machining, and quality inspection.

Differentiator

Problem solved

Functional benefit

Products and services

• 300mm FOSB (Front Opening Shipping Box) Auto-door 300mm wafer shipping box made of high-purity plastics, designed for robot-compatible opening/closing to enable automated wafer shipping in semiconductor manufacturing.
• 300mm FOUP (Front Opening Unified Pod) 300mm wafer FOUP enabling long-term operation with high dimensional accuracy, made of PC material with redundant lid gaskets and conductive materials for safe wafer storage and intra-fab transport.
• 300mm Single Wafer Cases 300mm wafer cases made of high-purity plastics for clean-room wafer storage, featuring a stackable design and hinge opening system for safe wafer transport and handling.
• Wafer Cassettes (PEEK, PFA, PBT, PP series, 75mm-300mm sizes) Cassettes for holding 13 to 25 wafers of various diameters (75, 100, 125, 150, 200, and 300mm) made from PEEK (high temperature durability), PFA (clean wafer washing, large opening area), PBT (anti-static with conductive compounds), and PP (lightweight, high purity). Includes PBT 300mm cassettes compliant with SEMI E1.9, PFA cassettes optimized for washing and drying, and PEEK cassettes for continuous high-temperature use.
• Wafer Storage Boxes (125mm, 150mm) Boxes made of high-purity PBT plastics for the safe storage and in-process cassette transfer of 125mm and 150mm wafers in clean rooms.
• MASK Series for Square Substrates Washing cassettes for carrying square substrates, available in both wafer cassette type and basket type configurations for square substrate cleaning applications.
• KS Fitting Series (Elbow, Tee, Reducer) - High-purity plastic weld fittings Compact, lightweight PFA weld fittings for space-saving piping design in semiconductor fluid handling systems: KS Elbow (small, lightweight, made of high-purity plastics), KS Tee, and KS Reducer (no-taper, low pressure loss structure).
• SB Fitting Series (Elbow, Tee, Reducer) - Short-type weld fittings Short-type weld fittings made of high-purity PFA plastics for compact piping design: SB Elbow, SB Tee, and SB Reducer, all targeting low pressure loss and space savings in semiconductor chemical delivery systems.
• Wafer Cassette Handles Handles for wafer cassettes enabling safe manual movement and immersion into process chambers, compatible with multiple Miraial cassette lines.
• Vertical Injection Molding Machines, Molds, and Automation Systems (Sanjo Seiki Co., Ltd.) Manufacture and sale of vertical injection molding machines, metal molds, and peripheral automation devices delivered on a turnkey basis through wholly owned subsidiary Sanjo Seiki Co., Ltd. (82 employees as of December 2025).
• Precision Plastic and Metal Machining, Rapid Prototyping, and Vacuum Casting Services (Miraial Tohoku Co., Ltd.) Precision plastic and metal machining, rapid prototyping, and vacuum casting services for product development support delivered through wholly owned subsidiary Miraial Tohoku Co., Ltd. (38 employees as of December 2024; Tohoku Operations Office established April 2020 in Fukushima).

Quantifiable outcome

• Products designed for semiconductor cleanliness standards with contamination control to ppt (parts per trillion) levels
• +1 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered supporting, core and minor.

• Miraial (Shanghai) Co., Ltd.supportingChannel Partner/ Reseller/ Distributor · 1 May 2019Sales subsidiary established May 2019 in Shanghai, China. Conducts sales activities for semiconductor-related products in the Chinese market.
• Miraial Tohoku Co., Ltd. (株式会社ミライアル東北)coreStrategic or Co-development Partner · 1 July 2012Precision plastic and metal machining company. Made wholly-owned subsidiary July 2012 (previously Miyamoto Molding Co., Ltd.). Provides prototyping, vacuum casting, and short-run production. 38 employees (as of December 2024). Tohoku Operations Office established April 2020 in Fukushima.
• Sanjo Seiki Co., Ltd. (山城精機製作所)coreStrategic or Co-development Partner · 1 October 1956Vertical injection molding machine manufacturer established 1956. Became Miraial subsidiary (70% stake acquired December 2006, made wholly-owned March 2011). Provides custom molding machines, molds, and automation systems. 82 employees (as of December 2025).
• Miraial Link (株式会社ミライアルリンク)supportingStrategic or Co-development PartnerGroup company included in Miraial Group corporate materials. Nature of business not detailed in available sources.
• unotani Nautical Instruments Mfg. Co., Ltd. (布谷舶用計器工業株式会社)minorOthersGroup company included in Miraial Group corporate materials. Nautical instruments manufacturing company.

Scale indicators7 records

Recent moves12 records

Expansion highlights5 records

Direct peers

• Nifco Inc. Japanese precision plastic components manufacturer serving automotive, industrial and electronics markets. Comparable to Miraial in precision injection molding capabilities, though Miraial is more concentrated in semiconductor end-markets.
• Sumitomo Bakelite Co., Ltd. Major Japanese plastics manufacturer producing specialty molding materials and semiconductor-grade plastic components. Overlaps with Miraial in high-purity plastics for wafer processing and electronics applications.
• Daicel Corporation: Japanese specialty chemicals and plastics manufacturer producing engineering plastics including POM and other resins used in semiconductor and industrial applications. Comparable to Miraial in specialty plastics processing for advanced industries.
• Shin-Etsu Polymer Co., Ltd. Japanese manufacturer of precision plastic products for semiconductor and electronics applications including wafer-related components. Competes head-to-head with Miraial in Japan for high-purity plastic wafer handling and processing parts.
• Entegris: US-listed semiconductor materials and fluid handling specialist offering FOUPs, wafer shipping containers, and fluid delivery systems to global fabs. Directly comparable to Miraial's core wafer handling and fluid systems product lines, with substantially larger scale and global reach.

Broad incumbents

• Tokyo Ohka Kogyo Co., Ltd. (TOK): Major Japanese semiconductor materials supplier specializing in photoresists and processing materials. Indirectly comparable as a Japanese semiconductor materials incumbent that also supplies wafer fab consumables.
• JSR Corporation: Japanese specialty chemicals and materials company serving semiconductor (photoresists, packaging materials) and life sciences markets. Comparable as a larger Japanese semiconductor materials supplier, though focused on chemical materials rather than plastic molded components.
• AGC Inc. Japanese materials and glass manufacturer with semiconductor-related products including fluoropolymers (Fluon® ETFE, etc.) used in wafer processing equipment. Comparable as a fluoropolymer supplier overlapping with Miraial's PFA-based fluid system components.
• Mitsubishi Chemical Group Corporation: Large Japanese diversified chemicals and specialty plastics producer with significant semiconductor materials exposure. Comparable in engineering plastics manufacturing but vastly larger and more diversified than Miraial.

Others

• Daikin Industries, Ltd. Japanese fluorochemicals leader (Neoflon™ PFA, PTFE) supplying raw fluoropolymers and some finished semiconductor fluid handling components. Comparable as a fluoropolymer ecosystem participant but with a much broader HVAC and chemicals portfolio.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries3 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 Miraial