Hamai
Hamai is a Japanese precision machinery manufacturer (founded 1934) producing ultra-precision lapping, polishing, hobbing, and dual-head NC milling machines for semiconductor wafer, HDD glass, sapphire/SiC, gear, and mold-making customers in Japan, China, and other export markets, now privately held following a 2025 MBO by Mint Co., Ltd.
- Company typePrivate
- Founded1934
- HeadquartersTokyo, Japan
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What Hamai does
Hamai (浜井産業株式会社, Hamai Co., Ltd.) is a Japanese precision machinery manufacturer founded in 1934 and headquartered in Tokyo, with a main production plant in Ashikaga, Tochigi Prefecture, and a wholly-owned sales and service subsidiary in Shanghai, China. The company designs and builds ultra-precision equipment across three core product families: lapping and polishing machines (ラップ盤/ポリッシ盤) for silicon wafers, glass disks, sapphire, SiC, and other hard-brittle materials; hobbing machines (ホブ盤) for precision gear cutting; and dual-head NC milling machines (両頭NCフライス盤) for mold-base machining. Its technology platform rests on proprietary fluid bearings (流体軸受), a wire-hanging upper platen mechanism (ワイヤー吊り機構), and a patent-pending rotating magnetic bearing, which together enable nanometer-level flatness (GBIR < 0.05μm on 300mm wafers) and gentle processing of thin, fragile workpieces.
The company sells directly to industrial customers in Japan through its Tokyo headquarters, Osaka branch, and East Japan sales department, and internationally through its Shanghai subsidiary and an overseas sales department covering Korea, Southeast Asia, India, Russia, and the USA. Revenue is generated via one-time equipment sales of high-ASP capital machinery, supplemented by recurring service revenue from Hamai Engineering, the wholly-owned subsidiary spun off in 2006 for machine overhaul, parts supply, and after-sales support. Customers span semiconductor silicon wafer manufacturers, HDD glass disk makers, LED/sapphire processors, crystal resonator producers, gear manufacturers, and Korean mold/die shops. The company was listed on the Tokyo Stock Exchange (TYO:6131) until June 2025, when it delisted following a tender offer and MBO led by Mint Co., Ltd., transitioning to private ownership under the Mint parent entity.
The business model is project-based and order-driven with long sales cycles typical of capital equipment, supported by participation in major international exhibitions (JIMTOF, CIMT, SEMICON, IMTEX) and an educational content series (研磨教室/Polishing Class). Hamai's competitive positioning relies on accumulated craftsmanship (kissage scraping, mirror grinding) developed over 80+ years, a long-lived installed base (some machines still serviced from the 1950s-60s), and incremental product extensions into emerging power semiconductor materials (SiC, GaN) and automation-integrated equipment demonstrated at JIMTOF 2022.
Hamai firmographics
Firmographics- Name
- Hamai
- Legal name
- 浜井産業株式会社 (Hamai Co., Ltd.)
- Website
- https://hamai.com
- Company type
- Private
- Founded year
- 1934
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- Hamai is a Japanese precision machinery manufacturer (founded 1934) producing ultra-precision lapping, polishing, hobbing, and dual-head NC milling machines for semiconductor wafer, HDD glass, sapphire/SiC, gear, and mold-making customers in Japan, China, and other export markets, now privately held following a 2025 MBO by Mint Co., Ltd.
- Ownership category
- akta.pro rank
Hamai industry classification
Industry- Product category
- Precision Machinery Manufacturing
- NAICS
- Machine Tool Manufacturing (333517)
- SIC
- Metalworkg Machinery & Equipment (3540), Machine Tools, Metal Cutting Types (3541)
- akta.pro primary industry
- Grinding, Honing & Superfinishing Equipment (IMAHADAE)
- akta.pro secondary industry
- Metal Forming & Fabrication Machines (Presses, Bending, Shearing, Stamping) (IMAHADAC)
Keywords
Where Hamai is headquartered
LocationHeadquarters
- HQ city
- Tokyo
- HQ country
- Japan
- HQ region
- Asia
Offices4 records
Markets served
Hamai business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Precision Machinery Manufacturing and Sales: Manufacture and sale of precision lapping/polishing machines, hobbing machines, and double-head NC milling machines. Products are sold directly to industrial customers with customization for specific applications. The company operates on a project-based, order-driven model with long sales cycles typical of precision equipment.
Go-to-market motion1 record
Distribution channels3 records
Marketing channels5 records
Hamai product offering
Product offeringCore offering
Hamai manufactures and sells ultra-precision lapping and polishing machines (ラップ盤/ポリッシ盤), hobbing machines (ホブ盤) for gear cutting, dual-head NC milling machines (両頭NCフライス盤) for mold base machining, and specialized new-material processing machines for hard, brittle substrates such as silicon carbide (SiC), gallium nitride (GaN), and sapphire. The company targets industrial customers — primarily semiconductor wafer manufacturers, hard-disk glass substrate producers, LED/sapphire processors, and gear manufacturers — with application-engineered equipment sold on a project/order basis with customization.
Product overview
Hamai (浜井産業株式会社) is a precision machinery manufacturer founded in 1931, producing a portfolio of ultra-precision grinding, lapping, polishing, and hobbing machines. The core product families are (1) lapping and polishing machines — comprising single-face HS series, 4-way BF series for volume production, and 3-way BN series with wire-suspension/fluid bearing technology for high-precision applications (silicon wafers, glass disks, sapphire, SiC) — plus DSP double-side polishing machines for 300mm+ semiconductor wafers; (2) grinding machines including GRD and HLG fine grinding machines applying CBN/diamond wheels for high-efficiency metal and hard-brittle material processing; (3) hobbing machines spanning the N-series CNC horizontal hobbers (N40/N60/N80), the GN150 hob relief grinder, and the legacy Micron-type 120 series (produced since 1936, discontinued 2018); and (4) dual-head NC milling machines for mold-base and four-side machining. The company also operates a new-materials processing division serving SiC, GaN, and sapphire wafer markets, and provides parts machining and maintenance/overhaul services through its group company Hamai Engineering.
Differentiator
Problem solved
Functional benefit
Brands
- ハマイエンジニアリング (Hamai Engineering): Maintenance, overhaul, and after-sales service subsidiary for precision machine tools including lapping machines, polishing machines, hobbing machines, and NC double-head milling machines
- 哈机械商贸（上海）有限公司 (Hamai Machinery Shanghai)
Products and services
- Lapping and Polishing Machines (ラップ盤 / ポリッシ盤) Precision dual-face and single-face lapping and polishing machines used for ultra-flat surface processing of silicon wafers, glass disks, quartz, sapphire, and other advanced materials. Used by semiconductor wafer manufacturers, HDD glass substrate producers, and crystal/optical component makers requiring nanometer-level flatness.
- Hobbing Machines (ホブ盤) Gear hobbing machines for cutting spur gears, helical gears, and worm gears across small to medium gear sizes. Used by gear manufacturers supplying automotive, OA equipment, and general industrial machinery customers, for both mass production and multi-variety small lot production.
- Dual-Head NC Milling Machines (両頭NCフライス盤) Dual-spindle NC milling machines designed primarily for mold-base and four-side machining of steel materials, used in die and mold manufacturing. Deployed by Korean mold manufacturers serving the automotive and electrical industries.
- New Material Processing Machines (新素材加工機)
Quantifiable outcome
- GBIR flatness of 0.05μm achievable on 300mm silicon wafers
- +3 more outcomes
Companies that use Hamai
Customer profileNamed customers6 records
Segments4 records
Ideal customer profiles6 records
Hamai technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Hamai partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core and minor.
- Hamai Engineering Co., Ltd. (ハマイエンジニアリング株式会社)coreMaintenance and after-sales service company spun off from Hamai in 2006. Provides overhaul services for lapping/polishing machines, hobbing machines, and NC double-head milling machines. Also supplies spare parts and consumables for older Hamai machines including models from the 1950s-60s.
- Technical Advisors and UniversitiesminorCollaboration with universities on research and development of new processing technologies. Company technical advisor Sugishita Hiroshi (杉下寛) provides technical guidance and educational content.
- Silicon Wafer ManufacturerscoreClose collaboration with semiconductor silicon wafer manufacturers for development of lapping/polishing equipment. Started in 1970s with 1.5-inch wafers and continued through 300mm wafer era. Customer feedback drove development of 32BF-DSP machines.
Scale indicators6 records
Recent moves9 records
Expansion highlights5 records
Hamai competitors and assessment
Company assessmentDirect peers
- Gleason Corporation: Gleason is a global leader in gear manufacturing equipment, including hobbing machines, gear grinding, and gear metrology — directly comparable to Hamai's hobbing machine line (N-series, 120-series, GN150 hob grinding) for the same automotive and industrial gear customers.
- DISCO Corporation: DISCO is a Japanese leader in precision cutting, grinding and dicing equipment for semiconductor wafers — overlapping with Hamai in semiconductor back-grinding and precision surface processing, and serving the same wafer fab and substrate customers.
- Okamoto Corporation: Okamoto is a Japanese precision grinding and lapping equipment manufacturer with broad offerings across surface, creep-feed, and double-side grinding machines, directly comparable to Hamai's GRD/HLG grinding and BF-series lapping machines.
- AM Technology (Lapmaster-Wolters Group): AM Technology produces precision lapping and polishing machines for advanced materials including silicon carbide and sapphire, directly comparable to Hamai's new-materials processing line and BF-series lapping machines for power semiconductor substrates.
- Speedfam (Entegris): Speedfam, now part of Entegris, is one of the world's leading manufacturers of precision lapping and polishing equipment for silicon wafers and advanced substrates, directly competing with Hamai's BF/BN/DSP lapping product lines for the same semiconductor wafer customers.
- Lapmaster Precision Surfacing Solutions: Lapmaster (formerly Peter Wolters) specializes in high-precision lapping, polishing and fine grinding machines, directly competing with Hamai in silicon wafer, sapphire, and general precision surface finishing applications globally.
Broad incumbents
- Yamazaki Mazak: Mazak is one of the world's largest machine tool manufacturers offering CNC milling, turning, and gear cutting centers, broadly competing with Hamai's dual-head NC milling and hobbing lines from a much larger installed-base position.
- Mitsubishi Heavy Industries (Machine Tool Division): Mitsubishi Heavy Industries manufactures a broad portfolio of machine tools, gear cutting equipment, and precision processing systems for semiconductor and industrial customers, overlapping with Hamai's hobbing, milling, and precision lapping offerings as part of a much wider portfolio.
- Liebherr (Gear Cutting Machines): Liebherr's gear cutting division produces hobbing and skiving machines for automotive and industrial gear production, directly comparable to Hamai's hobbing machine business and competing for similar mid-size gear manufacturing customers.
Emerging players
- Nakamura-Tome Precision Industry: Nakamura-Tome is a Japanese manufacturer of precision CNC lathes and multi-axis machining centers, overlapping with Hamai's NC milling machine line for mold-base and precision component manufacturing customers.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Hamai social profiles
Digital presenceHamai financial estimates
Financial estimateRevenue estimate
Valuation estimate
Hamai leadership team
Management profileNumber of profiles
Profiles12 records
Hamai subsidiaries and ownership
Company hierarchySubsidiaries2 records
Hamai funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Hamai M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Hamai
What does Hamai do?
Hamai manufactures and sells ultra-precision lapping and polishing machines (ラップ盤/ポリッシ盤), hobbing machines (ホブ盤) for gear cutting, dual-head NC milling machines (両頭NCフライス盤) for mold base machining, and specialized new-material processing machines for hard, brittle substrates such as silicon carbide (SiC), gallium nitride (GaN), and sapphire. The company targets industrial customers — primarily semiconductor wafer manufacturers, hard-disk glass substrate producers, LED/sapphire processors, and gear manufacturers — with application-engineered equipment sold on a project/order basis with customization.
Is Hamai a public or private company?
Hamai is a private company. It is classified as private equity controlled and is currently operating.
When was Hamai founded?
Hamai was founded in 1934. It employs 101 to 250 people.
Where is Hamai based?
Hamai is headquartered in Tokyo, Japan, in the Asia region.
How does Hamai make money?
One revenue line is on record: precision Machinery Manufacturing and Sales.
Who are Hamai's main competitors?
Direct peers on record are Gleason Corporation, DISCO Corporation, Okamoto Corporation, AM Technology (Lapmaster-Wolters Group), Speedfam (Entegris) and Lapmaster Precision Surfacing Solutions. Broad incumbents are Yamazaki Mazak, Mitsubishi Heavy Industries (Machine Tool Division) and Liebherr (Gear Cutting Machines). Nakamura-Tome Precision Industry is listed as an emerging player.
Does Hamai have an API?
No public API is recorded for Hamai.
What industry is Hamai in?
Hamai's product category is Precision Machinery Manufacturing. Its primary akta.pro industry code is IMAHADAE, Grinding, Honing & Superfinishing Equipment, with a secondary code of IMAHADAC, Metal Forming & Fabrication Machines (Presses, Bending, Shearing, Stamping). Its NAICS code is 333517 and its SIC code is 3540.