What Osaka Seiko does

Osaka Seiko Co., Ltd. (大阪精工株式会社) is a privately held Japanese precision manufacturer founded in 1948, headquartered in Ibaraki City, Osaka Prefecture, with a group-wide workforce of approximately 70 employees across three sites (Ibaraki headquarters, Yuki Factory in Hiroshima Prefecture, and Nax Precision in Itami, Hyogo Prefecture). The company operates three integrated divisions: Automation Equipment (自動化設備部門), Parts Processing (部品加工部門), and Inspection (検査部門). Its core products include custom-made assembly, inspection, and packaging machines; hand-crafted vibratory bowl parts feeders (パーツフィーダー) built by artisans for each workpiece; precision-machined components in carbide, industrial diamond, non-ferrous metals, and proprietary Ni- and tungsten-based alloys; and image-processing inspection equipment with internally developed FA control systems.

The firm's technical differentiation rests on Japan's first commercial production of cemented carbide balls (1961, with Sumitomo Electric), Japan's first artificial diamond processing capability (1984), and ongoing cutting experiments on alloys other manufacturers cannot process — work that depends on sensory judgment and artisan craftsmanship rather than purely automated methods. Capabilities extend to micro-precision parts down to ⌀0.15mm and tolerances in the micrometer range, with major equipment inventory including 11 machining centers, 8 NC lathes, 9 surface grinders, 7 wire EDM machines, 9 CMMs, and 3D printing for prototype samples. All three core factories hold ISO9001:2015 certification, and the group holds ISO14001 environmental certification plus a general construction industry permit covering electrical and mechanical installation work.

The business model is B2B custom manufacturing on a project basis. Revenue is generated through one-time equipment sales (custom automation systems, parts feeders), recurring precision machining services for exotic materials, and specialized inspection services. Pricing is quote-based with no public tariff; entry-level engineering salaries of ¥215,000/month provide a cost benchmark. Go-to-market is exclusively direct sales to end-user manufacturers across automotive, pharmaceutical, electronic components, resin, food, metalworking, electrical machinery, and robotics sectors — the company states it has 'no industry without delivery experience.' Customer engagement follows a specification-dialogue model culminating in turnkey on-site installation. Marketing is demand-driven and primarily direct-inquiry based, supplemented by 2025-vintage content marketing (staff blog, Kinki Railway bus advertising in Ibaraki City). The group is led by Representative Director Yoshida Masao (吉田政雄) and remains privately held with no external funding rounds.

Name

Osaka Seiko

Legal name

大阪精工株式会社 (Osaka Seiko Co., Ltd.)

Website

https://osakaseiko.co.jp

Company type

Private

Founded year

1948

Operating status

Operating

Headcount range

51–100 employees

Short description

Osaka Seiko (大阪精工株式会社) is a privately held Japanese precision manufacturer founded in 1948, operating three integrated divisions—automation equipment, custom parts processing in exotic alloys and hard materials, and specialized inspection—serving major Japanese manufacturers across automotive, pharmaceutical, electronic, and industrial machinery sectors through direct sales of made-to-order machinery.

Ownership category

akta.pro rank

Product category

Industrial Automation Equipment

NAICS

Cutting Tool and Machine Tool Accessory Manufacturing (333515), Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Other Measuring and Controlling Device Manufacturing (334519)

SIC

Special Industry Machinery, Nec (3559), Industrial Instruments For Measurement, Display, And Control (3823), Machine Tools, Metal Cutting Types (3541)

akta.pro primary industry

Robot End-of-Arm Tooling (Grippers, Tool Changers, Welding/Cutting Heads) (IMAHAHAD)

akta.pro secondary industries

Metrology, Inspection & Machine Tool Accessories (CMMs, Probing, Gauging) (IMAHADAK), Industrial Vision & Quality Inspection (HDAAAEAG)

Keywords

• Precision machining services
• Automation equipment manufacturing
• Factory automation systems
• Parts feeder manufacturing
• Industrial inspection services

Headquarters

HQ city

Ibaraki

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Automation Equipment (自動化設備): Design and manufacturing of custom automation systems including assembly machines, inspection machines, and packaging machines. In-house capabilities span specification definition, mechanical/electrical design, parts supply, assembly, electrical work, adjustment, inspection, and on-site installation. Revenue is generated on a project basis for made-to-order equipment.
2. Parts Feeder (パーツフィーダー) Manufacturing and Sales: Custom hand-crafted parts feeders (bowl feeders) for orienting and feeding components to assembly, inspection, and packaging lines. Bowls are customized per workpiece type, with capabilities for multi-size共用, double-lane output, and front/back sorting.
3. Precision Parts Machining (部品加工): Precision machining of ultra-hard alloy balls, industrial diamonds, non-ferrous metals, Ni-based alloys, tungsten-based alloys, high-hardness materials, and special new alloys. Services include grinding, electrical discharge machining, wire cutting, brazing, and 3D printing for dummy samples.
4. Inspection Services (検査部門): Specialized inspection services for precision parts using tool microscopes, image dimension measuring devices, coordinate measuring machines (CMM), and custom automated inspection equipment developed in-house. Includes feedback and quality improvement recommendations.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Osaka Seiko designs and manufactures custom automation equipment (assembly, inspection, and packaging machines) and operates an in-house one-stop value chain covering mechanical/electrical design, parts supply, assembly, electrical work, adjustment, inspection, on-site installation, and final inspection. The company also performs precision machining of ultra-hard alloys, cemented carbide balls, industrial diamonds, non-ferrous metals, and exotic alloys (Ni-based, tungsten-based, high-hardness materials) down to ϕ0.15mm tolerances, and provides specialized precision inspection services via tool microscopes, image dimension measuring devices, and coordinate measuring machines. A distinctive offering is the hand-crafted vibratory bowl parts feeder, custom-built by skilled craftspeople for each workpiece type.

Product overview

Osaka Seiko is a precision manufacturing company with over 77 years of history, operating as an integrated industrial equipment manufacturer. The company offers three core divisions: Automation Equipment (custom automation systems for various industries), Parts Processing (precision machining of carbide balls, diamond products, and non-ferrous metals), and Inspection (specialized precision parts inspection services). The company also manufactures its own Parts Feeders (vibratory bowl feeders) in-house as part of its automation equipment offerings, along with image processing inspection equipment and FA control systems. This integrated approach allows Osaka Seiko to handle the entire production process from design through manufacturing, assembly, and inspection.

Differentiator

Problem solved

Functional benefit

Products and services

• Automation Equipment Department (自動化設備部門)
• Parts Processing Department (部品加工部門)
• Inspection Department (検査部門)
• Parts Feeder (パーツフィーダー)

Quantifiable outcome

• Defect rate reduced to 0.37% (3 complaints per 800 lots) in 2020 inspection services
• +2 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• ナックス精密株式会社 (Nax Precision Co., Ltd.)coreOthers · 20 September 2019Nax Precision Co., Ltd. (伊丹市北本町) was made a wholly-owned subsidiary of Osaka Seiko in September 2019. It operates as an inspection-specialized business unit contributing to the group's comprehensive quality and inspection service offerings.

Scale indicators8 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Nabtesco Corporation: Large Japanese precision machinery manufacturer supplying components, automation systems, and robotics to industrial customers. Overlaps with Osaka Seiko's automation and precision parts activities but operates at much greater scale and breadth.
• Yamaha Motor Robotics: Division of Yamaha Motor supplying surface-mount equipment, factory automation robots, and industrial machines. Comparable as a Japanese factory automation supplier with broader product portfolio and global reach than Osaka Seiko.
• THK Co., Ltd. Japanese manufacturer of linear motion guides, ball screws, and automation components used in factory automation systems globally. Overlaps with Osaka Seiko's precision component capabilities but at vastly larger scale.
• FUJI Corporation: Japanese factory automation specialist producing SMT pick-and-place machines, assembly robots, and custom automation equipment. Comparable in custom automation and serving Japanese electronics/manufacturing OEMs but at a larger scale.

Direct peers

• Sodick Co., Ltd. Japanese manufacturer of precision EDM machines, wire-cut equipment, and metal cutting machine tools. Directly comparable in the precision machining of hard/exotic materials and use of coordinate measuring and inspection capabilities.
• Mitsui High-Tec Inc. Japanese manufacturer of precision motor core components and metal powder products using proprietary machining technologies. Comparable as a precision metal parts specialist serving Japanese automotive and industrial customers.
• Harmonic Drive Systems Inc. Japanese manufacturer of precision speed reducers and mechatronic components used in industrial automation and robotics. Comparable as a high-precision, high-tolerance component supplier to Japanese automation OEMs.
• Janome Corporation: Japanese industrial equipment manufacturer with a dedicated Industrial Equipment Division producing parts feeders and factory automation systems. The closest direct competitor in custom-built bowl feeders and small-format industrial automation in Japan.
• Hirata Corporation: Japanese manufacturer of custom industrial automation systems, assembly machines, and factory automation equipment serving automotive and electronics manufacturers. Closely comparable in product scope (custom assembly/inspection/packaging machinery) and customer mix, though at materially larger scale.
• CKD Corporation: Japanese factory automation equipment and pneumatic component manufacturer serving automotive, pharmaceutical, and electronics OEMs. Comparable in providing integrated automation solutions and precision components to the same Japanese manufacturing customer base.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance2 records

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 Osaka Seiko