What Murakami Seiki does

Murakami Seiki Co., Ltd. (村上精機株式会社) is a privately held Japanese ultra-precision machining and assembly company founded in 1948 in Sakai City, Osaka Prefecture, and currently led by third-generation representative director Syuzo Murakami (村上周三). The company specializes in the processing and assembly of ultra-precision parts, achieving tolerances of 1–3 micrometers across cutting, EDM, grinding, and lapping operations, with its hallmark being the hand-craftsmanship 'kisage' (scraping) technique that produces flatness approaching zero micrometers — a result unattainable by CNC machinery alone. It operates three production sites: a headquarters factory in Sakai, a Nara Assembly Factory established in July 2019, and the Hari-machi Second Factory completed in September 2022, with the latter focused on medical-related component mass production. Murakami Seiki's customer base spans aerospace, space observation and defense (JIS Q 9100:2016 certified), semiconductor manufacturing equipment, precision measurement and scientific instruments, machine tool builders, and medical device manufacturers.

The company's service offering is built on an integrated in-house stack covering design, CAD/CAM, 3D scanning (Carl Zeiss technology, JIS B 7440-2 compliant), cutting of difficult-to-machine materials (titanium, stainless, graphite, Kovar, tungsten, ceramics), wire EDM up to 450mm thickness, cylindrical and surface grinding, lapping, kisage scraping, laser welding/mold repair (Alpha Laser), and final assembly. A distinctive capability is its 40-year authorized partnership with Fuji Honing Industrial Co., Ltd. for honing tool manufacturing, including supply of replacement tools for discontinued Fuji Honing machines. The company also runs a formal kisage training program with a skill rank system from AA (23+ contact points, gauge-level) to D, a 20-day basic curriculum, and a separate consulting service — effectively monetizing its most defensible skill while developing successor artisans.

Murakami Seiki operates an exclusively direct-sales, project-based business model: there is no public pricing, no resellers, and no online store. Customers contact the company by phone (072-232-5693) or web inquiry form, receive custom quotes per project, and engage Murakami Seiki as a single-source supplier for sub-micron components and assemblies. Revenue is generated through one-time project orders spanning single-piece prototypes to mass production runs, priced per job based on complexity, material, and precision requirements. The company is a registered Japanese corporation (株式会社) with 40 employees, ¥22M in registered capital, JIS Q 9100:2016 and ISO 9001:2015 certifications, and recognition including the 300 Outstanding SMBs selection (2018), Osaka Manufacturing Excellence Award (2009), and the Sakai Wazashu brand certification for world-class technical skill.

Name

Murakami Seiki

Legal name

村上精機株式会社

Website

https://murakamiseiki.co.jp

Company type

Private

Founded year

1948

Operating status

Operating

Headcount range

1–10 employees

Short description

Murakami Seiki is a privately held Japanese ultra-precision machining and assembly company founded in 1948, specializing in 1–3 micrometer tolerance components and rare hand-scraping (kisage) craftsmanship. It serves aerospace, semiconductor equipment, precision measurement, machine tool, and medical device manufacturers from three factories in Sakai and Nara.

Ownership category

akta.pro rank

Headquarters

HQ city

Sakai

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. Precision Parts Manufacturing & Assembly: Custom precision metal parts manufacturing (single piece to mass production) combined with precision machine assembly services. Revenue is generated through project-based orders for machined components and assembly work, priced per job based on complexity, material, and precision requirements.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Murakami Seiki is a custom precision metal parts manufacturer and precision machine assembly service provider operating from Sakai, Osaka with additional facilities in Nara. The company combines traditional kisage (hand-scraping) craftsmanship with modern CNC 5-axis machining, wire EDM, precision grinding, and lapping to deliver components at 1–3 μm tolerances for aerospace, semiconductor, medical, and precision instrument manufacturers. It offers fully integrated services from design, prototyping, and difficult-to-machine material processing through final assembly, supplemented by honing tool manufacturing, 3D scanning, and laser welding/mold repair.

Product overview

Murakami Seiki is a precision machining and assembly service provider offering ultra-precision metal processing from prototype to mass production. The core portfolio centers on five manufacturing service categories: precision molds and mold components, precision measuring instruments, automated equipment components, precision mechanical assembly, and laser welding/mold repair. These are enabled by five core technology capabilities: kisage (scraping) technique for achieving machine-unattainable precision, ultra-precision assembly combining kisage finishing with in-house machined components, cutting (lathe/milling/3D), electrical discharge machining (wire EDM up to 450mm thickness), and precision grinding (1-3μm). Supplementary offerings include honing tool manufacturing for legacy Fuji Honing machines, 3D scanning digitization using Carl Zeiss technology, and technical consulting/training programs for kisage technique. The company serves aerospace, defense, semiconductor, medical, and general manufacturing sectors with materials including titanium, stainless, tool steels, and exotic alloys.

Differentiator

Problem solved

Functional benefit

Products and services

• Precision Molds and Mold Components
• Precision Measuring Instrument Components
• Automated Equipment Unit Components
• Precision Machine Assembly Services
• Laser Welding and Mold Repair
• Honing Tool Manufacturing and 3D Scanning Services
• Kisage Technique Training Program

Quantifiable outcome

• Sub-micron tolerances (1–3 μm) routinely achievable across all major machining processes
• +4 more outcomes

Named customers4 records

Segments5 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Four partnerships are on record, tiered core.

• Fuji Honing Industrial Co., Ltd. (富士ホーニング工業株式会社)coreStrategic or Co-development PartnerAuthorized cooperation partner for over 40 years. Murakami Seiki manufactures honing tools compatible with Fuji Honing machines, including discontinued models. Provides replacement honing tools for customers whose Fuji Honing equipment has been discontinued.
• Osaka Prefecture University Astrophysics Laboratory (大阪府立大学理学部宇宙物理学研究室)coreStrategic or Co-development PartnerAcademic research partner in the joint project to manufacture antenna components for space observation radio telescope. Contributed to Shanghai Astronomical Observatory project.
• National Astronomical Observatory of Japan (国立天文台)coreStrategic or Co-development PartnerResearch partner in joint space observation radio telescope project alongside Osaka Prefecture University and Shanghai Astronomical Observatory.
• Shanghai Astronomical Observatory, China (中国上海天文台)coreStrategic or Co-development PartnerEnd customer for space observation radio telescope antenna components manufactured by Murakami Seiki as part of the international joint project. The antenna components are used in the observatory's radio telescope for precision radio wave measurement.

Scale indicators6 records

Recent moves8 records

Expansion highlights4 records

Direct peers

• Okuma Corporation: Japanese CNC machine tool maker (multitasking, 5-axis, turning). Direct overlap in 5-axis precision machining; Murakami owns multiple Okuma MU-400V machines, indicating tight technology adjacency.
• Makino Milling Machine Co., Ltd. Japanese machine tool and precision machining services firm serving aerospace, semiconductor, and die-mold markets. Closest publicly listed comp on business model and customer base.
• Shigiya Machinery Works Co., Ltd. Japanese manufacturer of cylindrical and centerless grinding machines. Notably the maker of the OGM390UNCIII machines Murakami just purchased; a comp on grinding technology, with Murakami serving as a high-end customer/adjacent producer.
• Sodick Co., Ltd. Japanese manufacturer of EDM machines and precision machining centers. Closest direct comp in EDM and precision machining equipment and services, including linear motor and discharge technologies overlapping Murakami's EDM work.
• Engis Corporation: US/Japanese manufacturer of precision lapping, honing, and superfinishing equipment and consumables. Direct technology overlap with Murakami's lapping and honing tooling business.
• Marvel Manufacturing Co. (Nippon Marvel): Japanese maker of ultra-high-precision surface grinding machines used in mold and aerospace tooling. Comparable in pursuing sub-micron grinding accuracy for similar end markets.
• Yasda Precision Tools Co., Ltd. Japanese maker of high-precision grinding machines and machining centers serving mold, aerospace, and semiconductor customers. Direct overlap in precision grinding capability and customer mix.
• Mitsui Seiki Kogyo Co., Ltd. Japanese maker of ultra-precision jig borers, machining centers, and precision machine tools. Strong overlap in precision machining for aerospace, optical, and metrology markets.

Broad incumbents

• DMG MORI Co., Ltd. Global large-cap machine tool and turnkey manufacturing services provider. Broad incumbent in high-end 5-axis machining and aerospace supply, with a much larger scale and broader portfolio than Murakami.
• Yamazaki Mazak Corporation: One of the world's largest machine tool builders, with significant aerospace and semiconductor exposure. Overlaps with Murakami's end markets but at vastly larger scale with broader product portfolios.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCSOJO0A0NFDMF9WxSRDirXQ
• Instagraminstagram.com/murakamiseiki_official/?hl=ja

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 Murakami Seiki