What CMK Corporation does

CMK Corporation (日本シイエムケイ株式会社, tyo:6958) is a Tokyo-headquartered Japanese manufacturer of printed circuit boards (PCBs) founded in 1961 and operating with 1,001-5,000 employees as part of a publicly listed CMK Group with domestic subsidiaries. The company's product portfolio spans automotive PCBs, high-density multi-layer fine-line boards, high heat-dissipation and high-current boards, 3D flexible/folding circuits, high-speed and high-frequency transmission boards, and conventional PCBs, supplemented by board design/simulation and prototyping services, board mounting fixtures, and a "next-generation boards" emerging product line.

The business operates as a B2B contract manufacturer selling directly to automotive OEMs and tier-1 electronics suppliers, with automotive (safety systems, ADAS, EV components) as the primary vertical and high-speed communications, edge computing, and infrastructure/environment as secondary segments. Revenue mechanics are quote-based on specifications, volume, and contract terms with long-term enterprise customers; pricing is not publicly disclosed. GTM is sales-led, executed primarily through direct relationships and trade-show presence (Productronica in Germany, Nepcon Japan in Tokyo and Nagoya, and SPEXA for the space business ecosystem).

A single named enterprise customer — DENSO Tianjin Denso Electronics (TDE) — is disclosed and recognized CMK with a Quality Improvement Award in July 2025, illustrating the importance of safety-qualified automotive supply relationships. The company has no disclosed AI/ML capabilities, has issued no recent M&A, and operates within a stable but modestly contracting revenue band (approximately ¥630B annually in recent fiscal years), positioning CMK as a quality-focused incumbent in the global automotive PCB market rather than a growth-stage challenger.

Name

CMK Corporation

Legal name

日本シイエムケイ株式会社

Website

https://cmk-corp.com

Company type

Public

Founded year

1961

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

CMK Corporation is a Japanese PCB manufacturer founded in 1961 that designs, manufactures, and sells printed circuit boards primarily for automotive OEMs and tier-1 suppliers, with secondary applications in high-speed communications, edge computing, and infrastructure.

Ownership category

akta.pro rank

Product category

Printed Circuit Board Manufacturing

NAICS

Bare Printed Circuit Board Manufacturing (334412)

SIC

Printed Circuit Boards (3672)

akta.pro primary industry

PCB Fabrication (Rigid PCBs) (HDAHAOAG)

akta.pro secondary industry

PCB Fabrication (Flex & Rigid-Flex PCBs) (HDAHAOAH)

Keywords

• Printed circuit boards
• Automotive electronics manufacturing
• PCB prototyping services
• High-density multilayer boards
• Flexible printed circuits

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. PCB Manufacturing and Sales: CMK Corporation manufactures and sells printed circuit boards to automotive manufacturers and other electronics companies. Revenue is generated through the sale of standard and custom PCBs, likely on a project/contract basis with long-term customer relationships.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

CMK Corporation develops, manufactures, and sells printed circuit boards (PCBs) and electronic devices for industrial customers. Its product portfolio includes automotive PCBs, high-density multi-layer fine-wiring boards, high heat dissipation / high-current boards, high-speed transmission / high-frequency boards, 3D folding flexible PCBs, and conventional PCBs, complemented by board design, simulation, and prototyping services.

Product overview

CMK Corporation is a printed circuit board (PCB) manufacturer offering a comprehensive portfolio of products and services. The core offerings include automotive PCBs, high-density fine-wiring boards, high heat dissipation boards, high-frequency boards, flexible 3D-integrated boards, and conventional PCBs. These are complemented by design/simulation/prototyping services, board mounting fixtures, and next-generation board development initiatives. The company operates in the automotive, high-speed communications, and edge computing fields, with a focus on quality first principles.

Differentiator

Problem solved

Functional benefit

Products and services

• Automotive Printed Wiring Boards (車載用プリント配線板) Printed circuit boards engineered for vehicle electronics and automotive safety systems, supplied to automotive OEMs and tier-1 suppliers.
• High Heat Dissipation / High Current PCBs (高放熱 大電流 対応) PCBs designed for high-power and thermal management requirements, suitable for power electronics and high-current applications.
• 3D Folding Flexible PCBs (立体 折り曲げて組み込む) Flexible circuit boards that can be folded and integrated into three-dimensional configurations, enabling compact and custom-shaped electronic assemblies.
• High-Speed Transmission / High-Frequency PCBs (高速伝送・高周波 対応) PCBs optimized for high-frequency applications and fast data transmission, serving communications infrastructure equipment.
• High-Layer High-Density Fine Wiring PCBs (高多層 高密度 微細配線 対応) High-layer count PCBs with high-density fine wiring technology for complex electronics requiring miniaturization.
• Conventional Printed Wiring Boards (従来のプリント配線板) Standard conventional printed circuit boards for general-purpose electronics applications.
• Board Design / Simulation and Prototyping Services (基板設計/シミュレーションと試作) PCB design, simulation, and prototyping services that support customers in developing custom PCB solutions from concept to physical samples.
• Board Mounting Fixtures (基板実装関連治具) Fixtures and tools related to board assembly and mounting, supplied alongside CMK's PCB products.
• Next-Generation Boards (次世代 基板) Next-generation PCB technologies under development, representing CMK's emerging product initiatives.

Named customers1 record

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Two partnerships are on record, tiered minor and core.

• AstroX株式会社minorGTM or Marketing Partner · 26 May 2026CMK Corporation entered into a platinum sponsor contract with AstroX Corporation. This partnership provides CMK with visibility and marketing presence within the space business ecosystem represented by AstroX.
• DENSO 天津電装電子有限公司 (TDE)coreStrategic or Co-development Partner · 1 July 2025Long-standing customer relationship with Denso's Tianjin manufacturing subsidiary. CMK supplies PCBs for automotive electronics applications. CMK received DENSO TDE's Quality Improvement Award in July 2025, recognizing CMK's contribution to quality improvements in supplied components.

Scale indicators1 record

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Unimicron Technology: Taiwan-based PCB and IC substrate manufacturer with broad automotive and communications exposure. Larger scale peer covering overlapping multi-layer and high-density PCB categories.
• Ibiden: Large Japanese electronics materials and PCB manufacturer, including IC substrates and high-density PCBs. Comparable in automotive/industrial PCB exposure but with broader product portfolio and larger scale.
• Zhen Ding Technology Holding: Taiwanese PCB maker and one of the largest globally, serving automotive, mobile, and computing. Comparable in multi-layer PCB offerings though broader in consumer electronics.
• TTM Technologies: U.S.-headquartered PCB manufacturer serving aerospace/defense, automotive, and communications end-markets. Comparable in multi-layer, high-frequency, and safety-critical PCB categories.
• Shinko Electric Industries: Japanese manufacturer of IC substrates and plastic packages with PCB exposure. Operates at larger scale with a broader substrate-focused portfolio; relevant incumbent peer for high-density PCB categories.

Direct peers

• AT&S: Austrian PCB and IC substrate manufacturer with a strong automotive electronics customer base and high-end multi-layer capability. Directly comparable automotive-focused PCB peer.
• Meiko Electronics: Japan-based PCB fabricator serving automotive, industrial, and communications end-markets. Closely comparable mid-cap Japanese PCB peer with overlapping multi-layer and high-density capabilities.
• Nippon Mektron: Japanese PCB manufacturer and a global leader in flexible printed circuits (FPCs). Directly comparable to CMK in automotive and high-frequency flex PCB applications.

Emerging players

• Park Aerospace Corp. U.S.-based manufacturer of advanced composite materials and aircraft/space PCBs. Comparable in high-reliability, high-frequency PCB capabilities relevant to CMK's high-frequency and emerging space-vertical initiatives.
• Tripod Technology: Taiwanese PCB manufacturer with significant automotive exposure. Comparable in automotive multi-layer PCBs but operates from a lower-cost Asian base with greater scale than CMK.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/cmk-corporation

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 CMK Corporation