What Orbray does

Orbray Co., Ltd. (formerly Adamant Namiki Precision Jewel) is a Japanese precision components manufacturer founded in 1939 and headquartered in Tokyo, with operations across Japan, the United States, Singapore, Germany, and Thailand. The company operates six primary business divisions: precision jewel parts (sapphire, diamond, ruby, ceramic components using proprietary cutting, shaving, and polishing technologies), optical communication components (ferrules, sleeves, connectors, MEMS devices, fiber optic current sensors for telecom infrastructure), small motors (DC coreless, brushless, servo motors including collaborative robot end effectors under the K³HAND brand), medical and dental precision parts (including Bio-Zirconia® implants), diamond semiconductor substrates (KENZAN Diamond™ heteroepitaxial single-crystal wafers), and battery-less IoT vibration power generators (EHIoT).

The company's technological differentiation rests on proprietary micro-fabrication capabilities including heteroepitaxial diamond growth on sapphire substrates, atomic-level diamond CMP planarization, room-temperature GaN-diamond bonding, femtosecond laser micro-drilling down to 0.5μm, and step-flow growth methods enabling 3-inch single-crystal diamond substrates (with 4-inch development underway). Orbray has demonstrated world-record diamond semiconductor device performance at 875 MW/cm² output power in collaboration with Saga University, and 2,200+ W/m·K thermal conductivity in 50mm single-crystal diamond wafers.

Orbray operates a sales-led B2B model with direct customer engagement, quote-based pricing for custom components, and dedicated sales channels for each product category. The company sells to global telecommunications infrastructure operators, semiconductor manufacturers, medical device OEMs, automotive (EV) manufacturers, robotics firms, power grid operators, and government/aerospace organizations including JAXA-related space exposure experiments. Revenue derives from hardware sales of precision components, medical device ODM/OEM services, and emerging sales of diamond wafer substrates for power semiconductors and AI hardware thermal management applications. The company is privately held with no disclosed investors, is planning relocation of its headquarters to Yu-zawa, Akita Prefecture in December 2026, and is executing a US-Japan strategic alliance with Coherent, Sumitomo, and MP Materials for a proposed $500 million synthetic diamond production facility.

Name

Orbray

Legal name

Orbray株式会社

Website

https://orbray.com

Company type

Private

Founded year

1939

Operating status

Operating

Headcount range

251–500 employees

Short description

Orbray is a Japanese precision components manufacturer founded in 1939 producing industrial jewel parts, fiber optic components, small motors, medical device parts, and heteroepitaxial single-crystal diamond substrates for semiconductors and AI hardware thermal management, serving B2B customers across telecommunications, semiconductor, medical, automotive, robotics, and aerospace sectors globally.

Ownership category

akta.pro rank

Product category

Precision Industrial Components Manufacturing

NAICS

Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451), Electromedical and Electrotherapeutic Apparatus Manufacturing (334510)

SIC

Electronic Components & Accessories (3670), Optical Instruments & Lenses (3827), Jewelry, Precious Metal (3911)

akta.pro primary industry

Optoelectronic Components (LEDs, photodiodes, optocouplers, optical sensors) (IMAGAJAF)

akta.pro secondary industries

Optoelectronics & Photonics (LED/Laser/Optical ICs) (HDAHAAAH), Casting, Stamping & Fabrication (OEM/ODM) (CRAKAIAF)

Keywords

• Precision jewel components
• Fiber optic connectors
• DC coreless motors
• Diamond semiconductor wafers
• Precision ceramic manufacturing

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Precision Jewel Parts: Manufacture and sale of precision components including sapphire, diamond, ruby, ceramics, and other industrial gemstone materials and processed parts for watch components, bonding tools, precision nozzles, medical devices, and record stylus products.
2. Optical Communication Components: Production and sale of fiber optic components including ferrules, sleeves, connectors, adapters, attenuators, fiber arrays, MEMS devices, and optical current sensors for telecommunications infrastructure.
3. Small Motors and Motor Units: DC coreless motors, brushless motors, geared motors, encoders, servo motors for robotics, and specialized motor units including collaborative robot end effectors and diaphragm pumps.
4. Medical Device ODM/OEM: Custom medical device development and manufacturing services with over 50 years of experience serving medical and dental precision component markets.
5. Diamond Wafers for Semiconductors: Single-crystal diamond substrates and wafers for next-generation power semiconductor and quantum computing applications, positioning as a strategic material supplier for AI hardware thermal management.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Orbray manufactures and sells precision components fabricated from industrial gemstones and advanced materials, including diamond substrates/wafer, sapphire and ruby products, fiber optic ferrules/connectors/MEMS optical devices, DC coreless and brushless motors, and medical/dental precision components. The company also offers custom OEM/ODM medical device manufacturing services and proprietary energy harvesting devices (EHIoT). Products serve B2B customers in telecommunications, power semiconductors, medical devices, robotics, automotive, and luxury watch industries, distributed through direct sales, inquiry-based engagement, and global subsidiaries.

Product overview

Orbray Co., Ltd. is a precision components manufacturer with over 80 years of experience, formerly known as Adamant Namiki Precision Jewel. The company operates as a multi-product portfolio organized into distinct business divisions: (1) Precision Jewel Parts - industrial gems and precision components including diamond substrates, sapphire products, ruby, ceramics, and precision processing technologies; (2) Optical Communication Components - ferrules, sleeves, connectors, MEMS optical devices, lensed fibers, and fiber current sensors; (3) Small Motors - DC coreless/brushless motors, servo motors, and motor units including robot joint servos and collaborative robot end effectors; (4) Medical/Dental Precision Parts - including bio-ceramics and zirconia dental products; (5) EHIoT - battery-less vibration power generation devices for IoT applications; and (6) ORSONIC - premium sapphire audio accessories. The company also develops diamond-based radiation detectors and advanced diamond semiconductor materials for power electronics and quantum computing applications.

Differentiator

Problem solved

Functional benefit

Brands

• KENZAN Diamond™: Proprietary artificial diamond substrate brand produced via heteroepitaxial growth method using diamond micro-needles on sapphire substrates.
• NAPHIA
• ORSONIC
• EHIoT
• K³HAND
• Biozirconia®

Products and services

• Diamond Substrates and Wafers (KENZAN Diamond™) Single crystal diamond substrates and wafers produced via heteroepitaxial growth on sapphire substrates using proprietary step-flow growth method. Includes 2-inch free-standing substrates and 50mm wafers with thermal conductivity exceeding 2,200 W/m·K, designed for next-generation power semiconductors, AI hardware thermal management, and quantum computing applications.
• Optical Communication Components Components for fiber optic communication including ferrules, sleeves, connectors, adapters, attenuators, fiber arrays, pigtails, receptacles, and optical modules, used by telecommunications infrastructure operators and optical equipment manufacturers worldwide.
• MEMS Optical Devices MEMS-based optical variable attenuators, optical switches, and tunable optical filters for optical communication systems, enabling precise light signal control in telecom and data center networks.
• Fiber Optic Current Sensors Optical fiber current sensors using Faraday effect for current measurement in power transmission, automotive, railroad, and industrial applications, offering stable measurement with proprietary signal processing.
• Lensed Fiber Specialized optical fibers with lens tips for efficient coupling between laser diodes and optical fibers, available in spherical, cylindrical, and biconical configurations for optical device assembly.
• Small Motors DC coreless motors, brushless motors, geared motors, encoders, RC servo motors, 4-pole high-torque motors, ultra-small motors, motor drivers, and Dynalox non-energized locking systems for robotics, automation, and precision instrument applications.
• Robot Joint Servo Motors Servo motors designed for robot joint applications in collaborative robots and industrial automation systems, offering precise motion control in compact form factors.
• K³HAND Collaborative Robot End Effector End effector designed for collaborative robots to handle various industrial manipulation tasks, integrating with servo motor technology for precision gripping and movement.
• Diaphragm Pumps Precision diaphragm pumps for fluid transfer applications in medical devices, analytical instruments, and industrial processes requiring contamination-free pumping.
• Optical Interferometric Inner Circumference Precision Measuring Machine Precision measurement equipment using optical interferometry for high-accuracy inner circumference measurements in quality control and manufacturing inspection.
• Precision Jewel Parts Precision components manufactured from industrial gems including sapphire, ruby, diamond, ceramics, and other advanced materials using cutting, shaving, and polishing technologies for watch components, bonding tools, precision nozzles, and industrial parts.
• Sapphire Substrates and Products Single crystal sapphire substrates, sapphire support substrates, optical lenses, heat-resistant setters, sapphire plates, container tubes, and sapphire jewelry items for semiconductor, LED, and industrial applications.
• Bonding Tools Capillaries, wire holders, diamond push-up needles, and wedge bonding tools for semiconductor packaging assembly processes, manufactured from precision-machined ceramics and industrial gems.
• Precision Nozzles and Needles Precision nozzles, dispenser nozzles, suction nozzles, collets, and needles for electronic component mounting and handling in semiconductor and electronics manufacturing.
• Watch Components Watch bearings, ceramic watch cases and bands, sapphire watch windows, sapphire tube cases, and record styli for luxury and premium watch manufacturers.
• Medical and Dental Precision Parts Precision components for medical and dental applications including blood analyzer parts, ruby surgical knives for ophthalmic use, analytical instrument plungers, zirconia disks for dental applications, and cell membrane observation units.
• Bio-Zirconia® Zirconia ceramic with hydroxyapatite surface treatment for biomedical applications including dental prosthetics and artificial joints, providing biocompatibility and anti-delamination properties.
• LTCC Substrates Low Temperature Co-Fired Ceramic substrates for electronic applications including RF modules, sensors, and microelectronic packaging.
• Vibration Power Generation Devices (EHIoT) Battery-less IoT power generation devices using electromagnetic induction for vibration-based energy harvesting, achieving output tens to hundreds of times higher than conventional devices (1mW standard) for IoT sensor applications.
• ORSONIC Sapphire Audio Accessories Premium sapphire-based audio accessories including cantilevers and stylus components for high-fidelity sound systems, leveraging precision sapphire processing capabilities.
• Diamond Radiation Detectors Single crystal diamond radiation detectors for medical diagnostics, radiation therapy dosimetry, and nuclear radiation detection applications, offering radiation hardness and tissue-equivalent response.
• Small Wafer Cleaning System Compact wafer cleaning equipment for semiconductor manufacturing processes, designed for small-batch and R&D-scale wafer cleaning applications.
• Microwave Power Amplifiers Microwave power amplifier modules for communication applications including wireless infrastructure and signal processing systems.
• Record Styli and Cantilevers Precision record player styli and cantilevers for audio reproduction, manufactured from diamond and sapphire materials for high-fidelity vinyl playback.
• Coil Winding Nozzles and Guides Precision nozzles and guides for motor coil winding applications, enabling consistent and accurate winding of motor coils in motor manufacturing.
• 1D Fiber Arrays One-dimensional fiber arrays for optical device connections, including narrow-pitch and bent configurations, used in optical transceivers and photonic integrated circuit interfaces.
• Pigtails, Receptacles, and Optical Modules Fiber pigtails, optical receptacles, and complete optical module assemblies for telecommunications and data center optical interconnect applications.
• Medical Device ODM/OEM Manufacturing Services Custom medical device development and manufacturing services leveraging over 50 years of precision component experience for medical and dental device manufacturers, including design support, prototyping, and volume production.

Quantifiable outcome

• 875 MW/cm² output power and 2568V operating voltage world records for diamond semiconductor devices
• +3 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

Ten partnerships are on record, tiered core and flagship.

• Element Six (E6)coreStrategic or Co-development Partner · 16 June 2026Joint development partnership for wafer-scale single-crystal diamond production using Orbray's heteroepitaxial diamond growth technology combined with Element Six's CVD diamond synthesis platform and polishing expertise. Achieved reproducible process for 3-inch wafer-scale single crystal diamond; preparing 2-inch wafers for volume production at Element Six's facility in Gresham, Oregon; development of 4-inch substrates underway. This represents a shift from R&D toward scalable manufacturing targeting 6G wireless, power electronics, sensing, and quantum technology applications.
• Tokyo Metropolitan University and Tohoku UniversitycoreStrategic or Co-development Partner · 9 May 2026Research partnership developing heteroepitaxial diamond-based radiation detectors approximately 1,250 times smaller than conventional air-based ionization chambers with 13,500-fold sensitivity increase per unit volume. The detectors address longstanding limitations in radiation dosimetry for diagnostic X-ray imaging and radiation therapy with improved response linearity and minimal energy dependence. Published February 2026 with joint research funding.
• Coherent Corp, Sumitomo Corp, Sumitomo Electric, MP MaterialsflagshipStrategic or Co-development Partner · 2 February 2026US-Japan strategic alliance for synthetic diamond and rare earth resiliency including proposed $500 million synthetic diamond production facility in the US. Combines Japan's precision manufacturing with American industrial scaling to address thermal management challenges in AI chips using synthetic diamonds with thermal conductivity exceeding 2,000 W/mK. Pilot production at Gresham, Oregon facility expected late 2026; full-scale 4-inch diamond wafer production targeted for 2027.
• Tokyo Metropolitan University, Tohoku University, Tohoku Institute of Technology, and Osaka UniversitycoreStrategic or Co-development Partner · 8 April 2025Multi-university collaboration developing world's first diamond-based nuclear radiation detector utilizing Orbray's high-quality large-diameter single-crystal diamond substrate technology. The detector demonstrates superior radiation hardness and reliable operation in high-radiation environments with high signal integrity, low noise levels, and excellent long-term stability. Findings presented at Japan Radiology Congress 2025 in Yokohama.
• Saga UniversitycoreStrategic or Co-development Partner · 10 May 2022Joint research achieving world records for diamond semiconductor power device performance with output power of 875 MW/cm² and operating voltage of 2568V. Combined Saga University's device expertise with Orbray's large-diameter diamond wafer technology and atomic-level CMP surface planarization. Results published in IEEE Electron Device Letters with featured paper status.
• Osaka City University, Tohoku UniversitycoreStrategic or Co-development Partner · 9 September 2021Research collaboration achieving world's first direct bonding of gallium nitride (GaN) and diamond. Surface activated bonding method enables room-temperature bonding that withstands 1,000°C heat treatment. Diamond's recrystallization during heat treatment maintains high thermal conductivity at interface, enabling GaN transistors with temperature rise suppressed to approximately 1/4 previous levels. Published in ADVANCED MATERIALS (IF=30.849).
• Space BD Inc.coreStrategic or Co-development Partner · 25 August 2021Participation in Space BD's 'Space Delivery Project' for ISS exposure experiments using Orbray's KENZAN Diamond™ substrates aboard the Kibo module's external exposure platform (i-SEEP). First phase tested material resistance to space temperature and radiation environments; second phase planned for environment-resistant device testing. Project coordinated by Space BD as 'space commerce' company.
• Yabuki Precision Jewel Co., Ltd. (矢吹精密宝石株式会社)coreOthersConsolidated subsidiary company as part of Orbray Group corporate structure.
• Murakami Precision Co., Ltd. (村上精密株式会社)coreOthersConsolidated subsidiary company as part of Orbray Group corporate structure.
• Kagoshima Electronics Co., Ltd. (鹿児島電子株式会社)coreOthersConsolidated subsidiary company as part of Orbray Group corporate structure.

Scale indicators11 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Shin-Etsu Chemical: Shin-Etsu Chemical is a dominant Japanese supplier of silicon wafers, rare earth magnets, and precision chemical products — a comparable advanced materials manufacturer with overlapping semiconductor substrate and rare-earth adjacencies through the Orbray alliance.
• Coherent Corp: Coherent is a large US-based photonics and compound semiconductor company operating across laser optics, materials, and networking — broadly comparable to Orbray's optoelectronic and diamond substrate businesses, and a strategic alliance partner in the proposed USD 500M synthetic diamond facility.
• Mitsubishi Materials: Mitsubishi Materials manufactures advanced materials, cutting tools, and electronic components including cemented carbides and high-purity materials — comparable to Orbray's hard material processing and precision components capabilities.
• II-VI Incorporated (now part of Coherent): II-VI (now integrated into Coherent) manufactured compound semiconductor substrates, laser optics, and photonic components — a direct comparable for Orbray's compound semiconductor and optoelectronics product lines.

Direct peers

• Nidec Corporation: Nidec is the world's leading manufacturer of small precision motors, brushless DC motors, and servo motors — directly comparable to Orbray's DC coreless motors, brushless motors, and robot joint servo motor lines.
• Murata Manufacturing: Murata is the world's leading manufacturer of electronic components, sensors, and communication modules — comparable to Orbray's electronic components, MEMS optical devices, and precision sensor businesses serving telecom and industrial customers.
• Element Six (De Beers Group): Element Six is the world's leading producer of synthetic diamond and cubic boron nitride supermaterials, operating the Gresham, Oregon CVD facility — Orbray's joint development partner for wafer-scale single-crystal diamond production.
• Seiko Group (Seiko Holdings): Seiko manufactures watches, optical components, and precision instruments — overlapping Orbray's luxury watch components (sapphire windows, ruby bearings) and precision optical parts businesses.
• Sumitomo Electric Industries: Sumitomo Electric is a leading Japanese manufacturer of optical fiber, optical components, semiconductor materials, and precision parts — directly overlapping Orbray's optical communication components and diamond/substrate businesses, and currently a strategic alliance partner.

Emerging players

• Disco Corporation: Disco is a Japanese leader in semiconductor precision cutting, grinding, and dicing equipment — adjacent to Orbray's semiconductor materials and wafer processing capabilities and serving the same fab customer base.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/orbray_en
• YouTubeyoutube.com/@Orbray_channel
• Facebookfacebook.com/orbray.en
• Instagraminstagram.com/orbray_official

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries8 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 Orbray