ksk co,ltd

What ksk co,ltd does

KSK Co., Ltd. (株式会社ケイ・エス・ケイ) is a privately held Japanese precision machining company founded in 1976 in Saeki, Oita Prefecture and incorporated under its current name in 1991. The company specializes in ultra-precision grinding, forming, and mirror polishing of wear-resistant materials — principally cemented carbide (超硬合金), ceramics, and hardened steel (焼入鋼) — for use as functional components and tooling. KSK operates three manufacturing plants in Hiji, Hayami District, Oita (built 1989, 1995, 2005) housing 67+ surface grinders and a 2,000+ piece diamond grinding wheel inventory, with machining and inspection rooms held at a constant 22±0.3°C. The company achieves stable ±0.5µm dimensional accuracy and, with its ELID (Electrolytic In-process Dressing) mirror grinding system, has demonstrated Ra0.003µm surface roughness in test work.

The business operates three integrated service lines: (1) Ultra Precision Machining — custom grinding and forming to sub-micron tolerances on difficult-to-machine materials; (2) Technical Consulting — design, material, and process optimization that has in documented cases reduced customer processing costs to roughly one-tenth; and (3) Reform Engineering — repair, restoration, and reverse engineering of worn functional parts. Pricing is quote-based, project-driven, and not publicly disclosed, with technical drawings submitted via email or FAX. GTM is sales-led and direct to enterprise buyers in semiconductor and electronic component manufacturing (primary), with secondary presence in medical devices (since 2021 under government Business Restructuring Subsidy), aerospace (via NAMAC membership), and mold/die/automotive. The company maintains a bilingual Japanese/English website and generates demand through regular participation in INTERMOLD, Nepcon Japan, SEMICON Japan, and the High-Precision/Difficult Machining Technology Expo.

KSK is led by President Ryo Kawahara and Chairperson Tadayuki Kyotani. In 2018, the company entered a capital alliance with PMT Corporation that has since underwritten vertical expansion. Revenue and headcount are not publicly disclosed; registered capital is 10 million JPY. The company has accumulated multiple workplace and health-management certifications (Health Management Excellence Corporation 2022 and 2023; Best Practices Company 2022), reflecting strong domestic HR practices but no direct read-through to commercial scale.

Name

ksk co,ltd

Legal name

株式会社ケイ・エス・ケイ

Website

https://e-ksk.co.jp

Company type

Private

Founded year

1976

Operating status

Operating

Short description

KSK Co., Ltd. is a privately held Japanese precision machining company (founded 1976) specializing in ultra-precision grinding of cemented carbide, ceramics, and hardened steel to ±0.5µm tolerances, serving semiconductor, electronic component, medical device, and aerospace manufacturers via three plants in Oita, Japan.

Ownership category

akta.pro rank

Product category

Precision Machining Services

NAICS

Machine Shops (332710)

SIC

Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

Welding, Fabrication & Field Machining Services (On-site) (IMAIACAD)

Keywords

• Precision machining services
• Cemented carbide grinding
• Wear-resistant tooling
• Surface grinding services
• Ultra precision manufacturing

Headquarters

HQ city

Hiji

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Ultra Precision Machining Services: Custom precision grinding and machining services for cemented carbide, ceramics, and hardened steel materials. Revenue generated through project-based orders with processing fees based on complexity, material, and precision requirements. Services include single-piece and multi-piece simultaneous processing.
2. Technical Consulting: Technical consulting services providing optimal solutions for improving product life, reducing costs, and shortening delivery times based on extensive experience in ultra precision processing. Includes design optimization, material selection, and processing method recommendations.
3. Reform Engineering (Repair/Restoration): Repair and restoration services for damaged functional parts using ultra precision processing technology. Also includes reverse engineering for functional improvement of conventional parts.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

KSK Co., Ltd. provides ultra-precision grinding, forming, and polishing services for wear-resistant materials including cemented carbide, ceramics, and hardened steel, achieving ±0.5μm dimensional accuracy and mirror finishing to Ra0.003μm. The company complements its core machining services with technical consulting on design and material optimization, and reform engineering (repair/restoration and reverse engineering) of functional parts. All services are delivered from a 3-plant facility in Hiji, Oita, with strict temperature-controlled environments for sub-micron precision work.

Product overview

KSK Co., Ltd. is a precision machining service company offering three integrated service lines: Ultra Precision Machining (grinding, forming, and polishing of cemented carbide, ceramics, and hardened steel with ±1μm accuracy), Technical Consulting (optimization of product life, costs, and delivery times), and Reform Engineering (repair and reverse engineering of functional parts). The company operates manufacturing facilities with 67 surface grinders, 9 forming grinders, and over 2,000 grinding wheels, maintaining temperature-controlled environments at 22±0.3°C for sub-micron precision.

Differentiator

Problem solved

Functional benefit

Products and services

• Ultra Precision Machining (超精密加工)

Quantifiable outcome

• Processing costs reduced to 1/10th through design optimization (taper design replacing EDM concave design)
• +4 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators6 records

Recent moves5 records

Expansion highlights6 records

Broad incumbents

• Makino Milling Machine Co., Ltd. Major Japanese machine tool builder offering machining centers, EDM, and grinding systems to aerospace and semiconductor OEMs globally. Broader portfolio than KSK's grinding specialization, but overlapping precision-machining customer base and technology overlap (EDM, ultra-precision finishing).
• Citizen Machinery Co., Ltd. Japanese builder of precision CNC turning machines (lathes) producing ultra-precision turned components for electronics, medical, and automotive sectors. Serves adjacent precision-component demand with overlapping semiconductor/electronics customer base.
• Shibaura Machine (formerly Toshiba Machine): Large Japanese machine tool and precision equipment maker serving semiconductor, automotive, and aerospace markets. Offers ultra-precision lathes and machining centers that overlap with KSK's precision-component delivery to similar industrial customers.
• DMG Mori Co., Ltd. Global Japanese-German machine tool leader offering 5-axis machining centers, lathes, and ultra-precision turning systems. Competes for the same aerospace and medical precision-component work that KSK is targeting with its new Medical Component Section.
• Amada Co., Ltd. Dominant Japanese machine tool builder focused on sheet metal and metal cutting/forming equipment. Serves many of the same mold, die, and automotive precision-parts customers that KSK addresses through its secondary Mold/Die segment.

Direct peers

• Okamoto Corporation: Japanese manufacturer of surface grinding machines, the primary equipment type KSK uses and competes with at the application level. Both serve precision component manufacturers in semiconductor, electronics, and tooling supply chains with ultra-fine surface finishing capabilities.
• Horkos Corporation: Japanese machine tool builder focused on precision lathes and machining centers serving automotive and electronic component manufacturers. Comparable mid-sized Japanese precision machinery vendor competing for similar regional semiconductor and electronics tooling customers.
• Yasda Precision Tools (Nachi-Fujikoshi): Japanese producer of high-precision jig borers and surface grinding machines targeting molds, dies, and aerospace components. Yasda's ultra-precision machine tool portfolio overlaps KSK's core cemented-carbide and hardened-steel grinding application space.
• Mitsui Seiki Kogyo Co., Ltd. Japanese manufacturer of ultra-precision jig borers, grinding machines, and specialized equipment for aerospace, semiconductor, and optical components. The precision and material-handling requirements mirror KSK's cemented carbide and ceramic work.
• Sodick Co., Ltd. Japanese specialist in EDM machines (including WEDM and precision milling) serving semiconductor, mold, and electronics customers. KSK uses WEDM as a core process alongside grinding; Sodick's customer base and application focus closely mirror KSK's primary vertical.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

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 ksk co,ltd