What Tokyo Diamond Tool does

Tokyo Diamond Tool Manufacturing Co., Ltd. (株式会社東京ダイヤモンド工具製作所) is a Tokyo-headquartered, privately-held Japanese manufacturer founded in 1932, specializing in super-abrasive grinding and cutting tools using diamond and cubic boron nitride (CBN) grains bonded in metal, resin, vitrified, or electroplated matrices. The company manufactures single-crystal diamond (MCD) cutting tools, PCD/PCBN tools, grinding wheels, dressers, core drills, and diamond indenters, with a product portfolio spanning over 40 distinct product lines including the proprietary Arcceed, VEGA, Metarex, DEX, Miracle, Citius, and Hyperax brands. Products are engineered to process ultra-hard and hard-brittle materials — silicon, SiC, sapphire, quartz, ceramics, cemented carbide, CFRP, and precision mold steels — that conventional tools cannot efficiently machine.

The company operates from a Meguro-ku headquarters that also serves as a technology research institute, supported by three domestic production sites (Sendai Factory, Sendai Hinosaki Factory, Nagano Factory), the Natori Development Center for R&D, and five domestic sales offices (Tokyo, Sendai, Nagoya, Osaka, Fukuoka). International presence includes wholly-owned subsidiaries in Singapore (Tokyo Diamond Industries Singapore, est. 1995) and Thailand (Tokyo Diamond Thailand, est. 2008; T.D.M. Thailand manufacturing, est. 2010), plus a minority joint venture in Taiwan (Daito Tokyo Diamond Wheel, est. 2004). The company holds ISO9001:2015 certification (BSI Group Japan, FM584475) valid through June 2027.

The business model is B2B direct sales through a technical sales engineering force that provides material processing advisory, custom tool specification, and grinding condition optimization. Pricing is quote-based and not publicly disclosed. Customers span semiconductor and compound semiconductor manufacturing (SiC, GaN, sapphire wafer processing), precision optics and electronics (lens molds, FPD optical film molds), machine tools and precision components (cutting tool resharpening, bearing rollers), medical devices (Co-Cr and titanium alloy implants), and automotive and aerospace (CFRP/GFRP composites). The company employs approximately 300 full-time staff and is controlled by the founding Hamada family across two generations.

Name

Tokyo Diamond Tool

Legal name

株式会社東京ダイヤモンド工具製作所

Website

https://tokyodiamond.com

Company type

Private

Founded year

1932

Operating status

Operating

Headcount range

251–500 employees

Short description

Tokyo Diamond Tool is a privately-held Japanese manufacturer founded in 1932 that designs and produces custom diamond and CBN grinding wheels and cutting tools for semiconductor, optics, automotive, medical, and precision machinery industries across approximately 13 facilities in Japan, Singapore, and Thailand.

Ownership category

akta.pro rank

Product category

Industrial Abrasives and Precision Tooling

NAICS

Cutting Tool and Machine Tool Accessory Manufacturing (333515), Saw Blade and Handtool Manufacturing (332216)

SIC

Machine Tools, Metal Cutting Types (3541), Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

Metal Cutting Tools, Tooling & Workholding (Cutters, Inserts, Chucks, Fixtures) (IMAHADAB)

akta.pro secondary industries

Grinding, Honing & Superfinishing Equipment (IMAHADAE), Industrial Saws & Cutting Systems (Band/Circular Saws, Abrasive Cutting) (IMAHADAL)

Keywords

• Diamond grinding wheels
• CBN grinding tools
• Single crystal diamond tools
• Precision abrasive tools
• Industrial cutting tools

Headquarters

HQ city

Kami-meguro

HQ country

Japan

HQ region

Asia

Offices13 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D

Revenue model

1. Custom Diamond and CBN Grinding Wheels: B2B manufacturing and sales of custom-engineered grinding wheels and cutting tools to industrial manufacturers. Revenue generated through direct specification, custom development, and production of diamond/CBN wheels for precision grinding and cutting applications.
2. Diamond Cutting Tools (MCD, PCD, PCBN): Sales of single-crystal diamond (MCD), polycrystalline diamond (PCD), and polycrystalline cubic boron nitride (PCBN) cutting tools for precision machining applications.
3. Professional Services and Technical Consulting: Technical consulting on material processing, custom tool specification, grinding condition optimization, and engineering support services for customers implementing diamond tools.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Tokyo Diamond Tool (東京ダイヤモンド工具製作所) manufactures custom diamond and cubic boron nitride (CBN) superabrasive grinding wheels and cutting tools for industrial manufacturers. The company designs, engineers, and produces made-to-order abrasive tools — including resin-, metal-, vitrified-, and electroformed-bond wheels — as well as single-crystal diamond tools for precision machining of hard-brittle materials used in semiconductor, automotive, electronics, aerospace, and medical-device applications.

Product overview

Tokyo Diamond Tool Manufacturing Co., Ltd. is a precision diamond and CBN tool manufacturer serving the semiconductor, precision machinery, automotive, aerospace, electrical/electronics, and medical device industries. The product portfolio centers on four core categories: (1) Diamond and CBN grinding wheels including metal bond, resin bond, vitrified bond, and electroplated wheels for wafer processing, ceramics, and precision parts; (2) Diamond cutting tools including single-crystal diamond (MCD) bites, PCD/PCBN tools, end mills, and inserts for mirror finishing and precision cutting; (3) Specialized wheels including pad dressers, core drills, cutting blades, and dressing tools; and (4) Hardness testing components including diamond indenters and PCD measurement tips. Key product lines include the "VEGA" and "Tough Air" wafer grinding wheels, "Metarex" metal bond wheels, "Arcceed" high-profile MCD tools, "Miracle" mirror finishing bites, "DEX" pad dressers, and "Hyperax" PCD/PCBN tools. The company also develops custom specifications and offers made-to-order production for specialized applications.

Differentiator

Problem solved

Functional benefit

Brands

• アークシード (Arcceed): High-profile single crystal diamond tools with blade edge accuracy of 50nm or less
• ベガ (VEGA)
• タフエア (Tuff Air)
• メタレックス (Metarex)
• DEX
• ミラクル (Miracle)
• ハイパックス (HiPAX)
• シティウス (Citius)

Products and services

• Resin Bond Diamond/CBN Grinding Wheels Resin-bonded diamond and CBN grinding wheels for general-purpose grinding of hard-brittle workpieces including cemented carbide, ceramics, and hardened steels, sold to industrial manufacturer customers.
• Metal Bond Diamond/CBN Grinding Wheels Metal-bonded diamond and CBN grinding wheels for heavy-duty grinding applications requiring high wear resistance, used by industrial manufacturers on hard-brittle materials.
• Vitrified Bond Diamond/CBN Grinding Wheels Vitrified-bonded diamond and CBN grinding wheels designed for high-precision grinding requiring controlled porosity and free-cutting behavior, supplied to industrial grinding operations.
• Electroformed Diamond/CBN Grinding Wheels Electroformed (nickel-bonded) diamond and CBN grinding wheels for ultra-precision applications including optical, electronics, and small-radius grinding, supplied to industrial manufacturers.
• Mono-Krystal Single Crystal Diamond Tools Single-crystal diamond cutting and machining tools for ultra-precision turning, milling, and grooving of non-ferrous and non-metal workpieces such as aluminum optical components, precision mold inserts, and semiconductor-related components. Sold to industrial manufacturers requiring sub-micron surface finish.
• Semiconductor Wafer Backgrinding Wheels Diamond grinding wheels designed specifically for backgrinding silicon and other semiconductor wafers, supplied to wafer backgrinding process manufacturers and semiconductor production equipment users.
• Automotive Industry Grinding Wheels Diamond and CBN grinding wheels engineered for grinding automotive powertrain and chassis components (e.g., engine, transmission, bearing parts) made of hardened steel or cast iron, sold to automotive parts manufacturers.
• Electronics Industry Cutting and Grinding Wheels Precision diamond and CBN wheels and dicing blades used in cutting and grinding electronic ceramics, crystal, and hard-brittle electronic materials, sold to electronic component manufacturers.
• Aerospace Industry Grinding Wheels Diamond and CBN grinding wheels for precision grinding of aerospace-grade hard materials and components, supplied to aerospace parts manufacturers.
• Medical Device Industry Grinding Wheels Diamond and CBN grinding wheels for precision grinding of medical-device components requiring biocompatible, burr-free, and high-finish machining, sold to medical device manufacturers.
• EDM and Truing/Dressing Services Contract-based electrical discharge machining (EDM) truing, dressing, regrinding, and dressing-stone supply services for grinding wheels, sold to industrial customers as supporting tooling services.

Quantifiable outcome

• SiC wafer chamfering wheel life improved over 30% vs. competing products
• +7 more outcomes

Named customers4 records

Segments5 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• Daito Tokyo Diamond Wheel Co., Ltd. (大都東京精磨股分有限公司)minorStrategic or Co-development Partner · 1 January 2004Joint venture established in Taipei, Taiwan, in January 2004 with Daito Electronics Co., Ltd. Capital: NT$18,000,000. Specializes in grinding wheel regeneration processing and manufacturing. Tokyo Diamond Tool holds a stake in this joint venture.

Scale indicators3 records

Recent moves12 records

Expansion highlights5 records

Direct peers

• Asahi Diamond Industrial Co., Ltd. Japanese diamond and CBN tool manufacturer offering grinding wheels, cutting tools, and dressers for semiconductor, electronics, and machinery applications. Closest direct competitor to Tokyo Diamond Tool with overlapping product lines in wafer processing and precision grinding.
• Noritake Diamond Co., Ltd. (Noritake Coated Abrasive): Japanese manufacturer of diamond and CBN grinding wheels, cutting tools, and dressing tools for metalworking, electronics, and semiconductor applications. Direct overlap with TDT in super-abrasive product categories.
• Kure Grinding Wheel Co., Ltd. (Kure Grinding): Japanese manufacturer of conventional and super-abrasive (diamond/CBN) grinding wheels serving automotive, machinery, and electronics customers. Direct Japanese competitor in industrial grinding wheels with overlapping customer base.
• DISCO Corporation: Tokyo-based precision cutting, grinding, and polishing equipment and consumables supplier specializing in semiconductor wafer dicing and back-grinding. Direct competitor in SiC and compound semiconductor processing consumables, with significantly larger scale.

Broad incumbents

• TYROLIT Group: Austrian manufacturer of bonded and coated abrasives, including super-abrasive (diamond/CBN) grinding wheels for industrial, tool, and semiconductor applications. Broader portfolio but directly competes in precision grinding for hard-brittle materials.
• Element Six (De Beers Group): Synthetic diamond and super-abrasive materials manufacturer (part of De Beers) supplying diamond grit, PCD, and PCBN materials to tool makers and offering finished tools in some segments. Comparable upstream expertise and competitor in advanced super-abrasive tooling.
• 3M (Abrasive Systems Division): US diversified manufacturer with a global abrasive systems business including bonded abrasives, super-abrasive wheels, and precision grinding tools. Competes with TDT in industrial grinding applications with greater scale and broader geographic reach.
• Saint-Gobain (Surface Conditioning / Abrasives): Global French materials group with a large abrasives division offering bonded and coated abrasive products including diamond and CBN wheels. Broader portfolio than TDT but directly competes in super-abrasive grinding wheels for industrial and semiconductor applications.

Regional players

• Shinhan Diamond Industrial Co., Ltd. Korean diamond and CBN wheel manufacturer serving semiconductor wafer processing and precision grinding markets. Regional competitor with comparable specialty products for SiC and silicon wafer applications.
• ILJIN Diamond Co., Ltd. Korean manufacturer of diamond tools, CMP pads, and precision cutting tools serving semiconductor and electronics customers in Asia. Comparable product portfolio with strong Korean memory-chip customer base; competes regionally rather than in Japan.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries4 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 Tokyo Diamond Tool