MIZUKI

What MIZUKI does

MIZUKI (水島機工株式会社 / Mizushima Kiko Co., Ltd.) is a privately-held Japanese precision machining manufacturer founded in 1953, headquartered in Kurashiki City, Okayama Prefecture, with operations across two factories (Mizushima Factory and Tamashima Factory). The company produces precision machined components including outer rings, gear-ground parts, end mills, and regrinding services, alongside automated production line design, with its core technology centered on CNC machining, CNC tool grinding, and a one-stop production system spanning raw materials to finished products. Its primary customer segment is the automotive industry, evidenced by IATF16949:2016 certification obtained in 2018 and a Quality Excellence Award from Mitsubishi Motors Corporation for FY2017, with additional export activity supplying outer rings to a French automotive customer via the Tamashima facility.

The company operates a B2B enterprise field sales model: quotation-based, project-driven custom machining contracts initiated through website contact forms and developed via direct engagement with OEM buyers. It supplements direct sales with active participation in industry exhibitions such as ものづくりワールド [Tokyo], 機械要素技術展 (Mechanical Components Technology Expo), and おかやまテクノロジー展 (OTEX) for lead generation. Beyond its manufacturing core, MIZUKI holds a CELF certified sales and development partnership with SCSK Corporation, allowing it to offer the CELF no-code Excel-based business application platform and RPA implementation as a secondary service line.

Revenue mechanics derive from custom precision machining contracts (turning, milling, grinding, automated lines) and tool grinding services, with pricing not publicly disclosed and structured per project. The company maintains BCP Resilience Certification (2022) and consecutive Health Management Outstanding Corporation recognition (2025 and 2026), signaling investment in operational continuity and workforce management. Ownership is private with no disclosed parent, subsidiary, or external funding structure.

Name

MIZUKI

Legal name

水島機工株式会社

Website

https://company.mizushima-kiko.co.jp

Company type

Private

Founded year

1953

Operating status

Operating

Headcount range

251–500 employees

Short description

MIZUKI is a privately-held Japanese precision machining manufacturer founded in 1953, producing automotive components, gear-ground parts, and CNC tool grinding services from two factories in Kurashiki, Okayama. It also resells CELF no-code application and RPA solutions as a certified SCSK partner.

Ownership category

akta.pro rank

Product category

Precision Machining Services

NAICS

Industrial Machinery Manufacturing (33324)

SIC

Special Industry Machinery, Nec (3559)

akta.pro primary industry

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

Keywords

• Precision machining services
• Automotive parts manufacturing
• Tool regrinding services
• Automated production lines
• Gear grinding services

Headquarters

HQ city

Okayama

HQ country

Japan

HQ region

Asia

Offices2 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 Machining Manufacturing Services: Custom precision machining services for automotive and industrial customers including turning, milling, grinding, and automated manufacturing. Revenue is generated through project-based contracts for custom parts manufacturing, tool grinding services, and automated line provision.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

MIZUKI is a Japanese precision machining manufacturer that produces outer rings and custom machined components, offers gear grinding (歯面研削), designs and builds automated production lines, and provides tool regrinding and end mills (エンドミル) for automotive and industrial customers. The company also distributes the CELF no-code Excel-based business application development platform as a certified partner of SCSK Corporation, offering it to a separate B2B customer base seeking internal application development.

Product overview

MIZUKI operates two distinct business areas: (1) precision machining and manufacturing services including outer rings, gear grinding (歯面研削), automated production lines, tool regrinding, and end mills; and (2) CELF, a no-code Excel-based business application development platform offered as a certified partner of SCSK Corporation.

Differentiator

Problem solved

Functional benefit

Brands

• CELF: A no-code business application development tool similar to Excel, offered as a CELF-certified sales and development partner. Enables businesses to create applications and RPA automation without programming knowledge.

Products and services

• Precision Machining Services Contract-manufactured precision-machined components, primarily outer rings (アウターリング), produced for automotive OEMs and Tier-1 suppliers and industrial customers. Includes turning, milling, and finishing operations backed by IATF16949:2016 quality certification.
• Gear Grinding Services (歯面研削) High-precision gear finishing service using 歯面研削 (gear surface grinding) technology for automotive drivetrain and industrial gear applications requiring tight dimensional tolerances.
• Automated Production Line Design and Construction Turnkey design, engineering, and construction of automated production lines for manufacturers seeking labor-saving or capacity-expanding production systems. Delivered as project-based contracts.
• Tool Regrinding Services Resharpening and regrinding service for carbide cutting tools, particularly drills, using CNC honing to restore tool life. Customers send used cutting tools for refurbishment rather than purchasing new ones.
• End Mills (エンドミル) Manufactured cutting tool product — end mills — supplied to industrial customers for metal-cutting operations, leveraging MIZUKI's machining expertise.
• CELF No-Code Business Application Platform CELF is a no-code platform that lets business users build custom applications on top of Excel. MIZUKI distributes the platform under a partnership with SCSK Corporation (its developer), targeting Japanese enterprises that lack in-house developer resources but need to digitize internal workflows.

Quantifiable outcome

• Re-sharpened tools achieve 100% of new tool life寿命 (industry average is 70%)

Named customers2 records

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Two partnerships are on record, tiered core.

• SCSK Corporation (SCSK株式会社)coreTechnology or IntegrationSCSK Corporation is a major Japanese IT services company that provides the CELF no-code development platform. 水島機工 is a CELF certified partner (販売パートナー・開発パートナー) offering CELF-based system development and RPA implementation services. Case studies of 水島機工's CELF RPA implementation have been published on SCSK's customer case page.
• CELF (セルフ)coreTechnology or IntegrationCELF is a no-code Excel-compatible business application development tool provided by SCSK Corporation. 水島機工 is a CELF certified partner for sales and development, offering CELF-based solutions to customers. The partnership enables provision of low-cost RPA options for automating routine business tasks.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• Makino Milling Machine Co., Ltd. Japanese machine-tool and automated production system manufacturer — directly comparable to MIZUKI's automated production line capability and CNC machining focus.
• Mitsubishi Materials Corporation: Large Japanese materials and industrial products group including cutting tools and automotive parts — broader incumbent that overlaps with MIZUKI on end mills and precision components.
• Sandvik AB: Global Swedish engineering group with major machining and cutting-tool divisions — broader incumbent operating in the same precision-machining and tooling space as MIZUKI.

Direct peers

• NSK Ltd. Global Japanese bearings and automotive components manufacturer — overlap with MIZUKI in precision-machined outer rings and motion-control components for automotive and industrial markets.
• Yamawa Manufacturing Co., Ltd. Japanese manufacturer of taps, end mills, and thread-cutting tools — directly comparable to MIZUKI's cutting tool and tool regrinding business.
• OSG Corporation: Leading Japanese manufacturer of taps, end mills, and other cutting tools with global reach — comparable to MIZUKI on end mills and tool regrinding services.
• JTEKT Corporation: Major Japanese manufacturer of bearings, drivetrain components, and steering systems — directly comparable to MIZUKI on outer-ring and precision drive-part manufacturing for automotive and industrial customers.
• NTN Corporation: Japanese bearing and precision component manufacturer with significant automotive OEM exposure — comparable to MIZUKI on outer-ring production and automotive tier-1 supply.
• Nachi-Fujikoshi Corporation: Japanese maker of bearings, cutting tools, and hydraulic equipment — directly comparable to MIZUKI on cutting tools/end mills, gear grinding, and bearings.

Emerging players

• Union Tool Co. Specialized Japanese manufacturer of precision cutting tools (drills, end mills) — comparable to MIZUKI on tool manufacturing and regrinding, with a more focused cutting-tool portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/profile.php

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 MIZUKI