株式会社プロテック

What 株式会社プロテック does

株式会社プロテック is a privately-held Japanese precision machining manufacturer founded in April 1988 and headquartered in Takamatsu, Kagawa Prefecture. The company operates two factories in Takamatsu — its original headquarters facility and a second factory completed in September 2022 — and employs approximately 42 technical staff. Its business is custom contract manufacturing of high-tolerance components for three end-uses: aircraft engine and aerospace parts, semiconductor manufacturing equipment parts, and ultra-high vacuum components such as chambers and piping for vacuum-integrity-sensitive applications. Protec holds JIS Q 9100:2009 (AS9100-equivalent) aerospace quality certification, ISO9001 since 2003, and is recognized by the Japanese government as a contributing SME, including receipt of the Order of the Rising Sun with Gold Rays by its leadership in 2023.

The underlying technology platform is an integrated 3D-CAD/CAM-to-CNC-to-inspection workflow anchored by Mazak INTEGREX e-series, MULTUS, and MU-8000V 5-axis composite machining centers, horizontal machining centers with multi-pallet lights-out systems, TIG welding capability for vacuum chamber fabrication, and a Renishaw REVO-2 5-axis scanning probe on coordinate measuring equipment, with HELIOT 700/710 helium leak detectors for vacuum-integrity verification. Gantry and horizontal machining centers added in 2025 further extend large-format capability. The company sells exclusively to enterprise customers — domestic Japanese aerospace component manufacturers, semiconductor equipment makers and trading companies, and ultra-high vacuum system builders — under custom quote-based, multi-year contract pricing, with go-to-market executed through direct field sales supplemented by participation in SEMICON JAPAN and the Mechanical Components Technology Expo in Tokyo, Osaka, and Fukuoka. Revenue figures are not publicly disclosed.

Name

株式会社プロテック

Legal name

株式会社 протекс

Website

https://kk-protec.jp

Company type

Private

Founded year

1988

Operating status

Operating

Headcount range

1–10 employees

Short description

株式会社プロテック is a privately-held Japanese precision machining SME in Takamatsu, Kagawa, that contract-manufactures high-tolerance aircraft engine components, semiconductor manufacturing equipment parts, and ultra-high vacuum chambers for domestic Japanese aerospace and semi-equipment OEMs.

Ownership category

akta.pro rank

Product category

Precision Machined Components Manufacturing

NAICS

Aerospace Product and Parts Manufacturing (33641), Other Aircraft Parts and Auxiliary Equipment Manufacturing (336413)

SIC

Aircraft & Parts (3720), Miscellaneous Fabricated Metal Products (3490)

akta.pro primary industry

Metal Airframe Structures & Machined Parts (IMABAEAC)

akta.pro secondary industry

Structural Assemblies & Integration (Airframe Subassemblies) (IMABAEAD)

Keywords

• Precision machining services
• Aerospace component manufacturing
• Semiconductor equipment parts
• Ultra-high vacuum components
• CNC 5-axis machining

Headquarters

HQ city

Takamatsu

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Precision Parts Manufacturing: Custom precision machining services for aerospace and semiconductor industries. Revenue generated through manufacturing and selling of customer-specific precision components including aircraft engine parts, semiconductor manufacturing equipment parts, and ultra-high vacuum components. Manufacturing is project-based with custom quotes per order.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

株式会社プロテック is a custom precision machining manufacturer producing high-tolerance components for Japanese enterprise customers. Its three core product lines are aircraft/aerospace engine parts, ultra-precision semiconductor manufacturing equipment components, and ultra-high vacuum chambers and components, manufactured via CNC turning, 5-axis composite machining, TIG welding, and coordinate measurement inspection.

Product overview

株式会社 протеч (Proteck) is a precision machining manufacturer specializing in three core product categories: aircraft/aerospace components (航空機関連部品), semiconductor manufacturing equipment components (半導体製造装置部品), and ultra-high vacuum equipment components (超高真空装置部品). The company operates as a single unified precision manufacturing operation, serving domestic Japanese aerospace part manufacturers and semiconductor equipment makers. Their manufacturing capabilities span CNC turning, 5-axis machining, compound machining, welding, inspection, and cleaning processes, enabling them to produce highly precise components including vacuum chambers, jet engine parts, and intricate mechanical assemblies.

Differentiator

Problem solved

Functional benefit

Products and services

• 航空機関連部品 (Aircraft/Aerospace Components) Precision-machined aerospace components including aircraft engine parts and aerospace structural components, manufactured to exacting tolerances using 5-axis machining centers and multi-axis compound machining equipment under JIS Q 9100 (AS9100 equivalent) aerospace quality management. Sold to domestic Japanese aerospace parts manufacturers and aircraft engine OEMs on a custom contract-manufacturing basis.
• 半導体製造装置部品 (Semiconductor Manufacturing Equipment Components) Ultra-precision components for semiconductor manufacturing equipment, including small parts for front-end processing and vacuum chamber assemblies. Produced for domestic Japanese semiconductor equipment makers and trading companies under custom contract manufacturing with tight tolerances, ultra-high vacuum requirements, and clean processing.
• 超高真空装置部品 (Ultra-High Vacuum Equipment Components) Ultra-high vacuum components including vacuum chambers, vacuum piping, and hermetically sealed containers manufactured using TIG welding and validated by HELIOT 700/710 leak detection systems. Sold to ultra-high vacuum system manufacturers, semiconductor equipment makers, and partner factories for semiconductor manufacturing and research applications.

Quantifiable outcome

• First vacuum industry factory established in the region with continuous technological advancement since 1988
• +1 more outcomes

Named customers3 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

One partnership is on record.

• 経済産業省中小企业庁notableOthers · 9 June 2023Government recognition and recommendation for the Order of the Rising Sun medal. The company was nominated and supported by METI Small and Medium Enterprise Agency officials for the prestigious honor.

Scale indicators4 records

Recent moves8 records

Expansion highlights4 records

Broad incumbents

• Senior plc: Global aerospace and industrial precision engineered components manufacturer. Comparable as a broad incumbent serving aerospace OEMs with high-precision machined and assembled parts.
• Citizen Machinery Co., Ltd. Japanese manufacturer of precision CNC turning and machining centers used widely in Japanese job shops. Comparable as a broad incumbent supplying the equipment class Protec specializes in.
• Howmet Aerospace Inc. Global aerospace structural and engine components manufacturer. Comparable as a much larger incumbent competing in aerospace precision parts that Protec serves at a regional tier.
• Yamazaki Mazak Corporation: Major Japanese machine tool builder producing 5-axis machining centers used in aerospace precision work. Comparable as an incumbent in the broader precision machining ecosystem.
• DMG MORI Co., Ltd. Large Japanese/European machine tool builder whose 5-axis machining centers (similar to those Protec operates) define the equipment category. Comparable as the broader incumbent defining the precision machining ecosystem Protec operates in.

Direct peers

• Fuji Precision Co., Ltd. Japanese precision machining company producing complex aerospace and industrial components. Comparable as a smaller Japanese job shop competing in tight-tolerance aerospace work.
• Yutaka Manufacturing Co., Ltd. Japanese specialty precision parts manufacturer serving aerospace, automotive, and industrial customers with machining capabilities. Closely comparable in size, vertical mix, and reliance on Japanese OEM customers.
• Howa Aerospace Co., Ltd. Japanese manufacturer of aerospace structural and engine components using precision machining. Comparable in serving Japanese aerospace OEMs with certified, complex machined parts.
• Aichi Precision Co., Ltd. Japanese precision machining firm producing components for aerospace and semiconductor industries. Closely comparable in product mix (aerospace + semi equipment parts) and customer base.
• Kyowa Industrial Co., Ltd. Japanese precision parts manufacturer serving aerospace and industrial customers. Similar in being a regional Japanese supplier to aerospace OEMs with multi-axis machining capabilities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/%E6%A0%AA%E5%BC%8F%E4%BC%9A%E7%A4%BE%E3%83%97%E3%83%AD%E3%83%86%E3%83%83%E3%82%AF

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 株式会社プロテック