Jindai Iron Works Co

What Jindai Iron Works Co does

Jindai Iron Works Co (株式会社神代鉄工所, Kumashiro) is a Japanese precision machine tool manufacturer founded on 29 November 1960 in Minokamo, Gifu Prefecture, and operating from a single campus of 13,800 sqm land with 8,200 sqm of factory building. The company has 62 employees (June 2022), JPY 10M in capital, and is led by Representative Director 太田 勲 (Ohta Isao). Since April 2018 it has been a wholly-owned subsidiary of OKUMA Corporation (オークマ株式会社), formalizing a 60-year partnership-factory relationship during which it manufactured CNC machine tool components and assemblies to OKUMA's specifications and quality standards.

Its core offering is the assembly of OKUMA-brand CNC machinery spanning vertical machining centers (MX/MB series), horizontal machining centers (MA series, MB-8000H), gantry machining centers (MCV-A, MCR-BIII 25x65), CNC lathes (LB3000 EX, LB4000 EX, V80R vertical lathe), cylindrical NC grinders (GA-34FII), and vertical NC milling machines (V-NC series), all controlled by OKUMA's proprietary OSP family. A complementary product, marketed as "Automation Kumashiro," comprises loader systems, work tables, inversion devices, and OK/NG judgment devices that link to machine tools for unmanned operation. Internal roles documented in employee narratives include main-unit assembly with micron-level perpendicularity adjustment, electrical wiring for control systems, industrial assembly of automation cells, and NC cylindrical grinding for precision parts finishing.

Revenue is generated through B2B hardware sales of completed CNC machines and automation systems, supplemented by precision parts processing services. Distribution runs through OKUMA's sales network rather than independent channels; the two named customers are OKUMA (the parent and primary off-taker) and Risupack Corporation. GTM motion is enterprise field sales via the parent; pricing is custom-quoted by specification and volume and is not publicly disclosed. Headcount suggests a focused single-site manufacturer rather than a diversified industrial group.

Name

Jindai Iron Works Co

Legal name

株式会社神代鉄工所

Website

https://kumashiro-tk.co.jp

Company type

Private

Founded year

1960

Operating status

Operating

Headcount range

51–100 employees

Short description

Jindai Iron Works Co (Kumashiro) is a Japanese precision machine tool manufacturer and wholly-owned subsidiary of OKUMA Corporation, assembling CNC vertical and horizontal machining centers, lathes, gantry machines, and grinder automation systems to OKUMA specifications for B2B manufacturing customers.

Ownership category

akta.pro rank

Product category

Industrial Machinery / CNC Machine Tools

NAICS

Machine Tool Manufacturing (333517), Metalworking Machinery Manufacturing (33351)

SIC

Machine Tools, Metal Cutting Types (3541), Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

CNC Machine Tools (Turning, Milling, Machining Centers) (IMAHADAA)

akta.pro secondary industries

Industrial Controllers & Control Systems (PLCs, PACs, CNC Controllers) (IMAHAHAH), Motion & Machine Control (CNC, Robotics Controllers, Servo/Motion Controllers) (IMAGABAG)

Keywords

• CNC machine tools
• Precision machining
• Industrial automation systems
• Dedicated machinery manufacturing
• NC grinding services

Headquarters

HQ city

Minokamo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Machine Tool Manufacturing: Design, manufacture, and sale of CNC machine tools (vertical/horizontal machining centers, CNC lathes) and dedicated/specialized machinery. Products include standard CNC equipment and custom-built machines for specific customer requirements.
2. Automation Systems: Design and manufacture of loader and work table systems that connect to machine tools to enable unmanned/automated production. Includes material tables, product tables, inversion devices, and OK/NG judgment devices.
3. Parts Processing Services: NC cylindrical grinding and precision parts finishing services using specialized grinding equipment for components requiring tight dimensional accuracy and surface finish specifications.

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Jindai Iron Works Co designs, manufactures, and sells CNC machine tools and dedicated/specialized machinery, including NC lathes, vertical and horizontal machining centers, gantry machining centers, and cylindrical NC grinders, all controlled by OKUMA's OSP control systems. The company also builds automation systems — loaders and work tables for material loading/unloading and OK/NG judgment — that integrate with its machine tools to enable unmanned and automated production for manufacturing customers.

Product overview

Jindai Iron Works Co is a traditional machine tool manufacturer specializing in the design, manufacture, and sale of CNC machine tools and specialized/custom machinery. The company operates as a subsidiary of OKUMA Corporation (since April 2018) and has 60 years of experience. Their product portfolio includes NC lathes (LB series, V80R vertical lathe), vertical machining centers (MX/MB series), horizontal machining centers (MA series, MB-8000H), gantry machining centers (MCV-A, MCR-BIII series), cylindrical grinders (GA-34FII), and specialized equipment (loader beam processing machine). Additionally, they offer automation systems featuring loaders and work tables that integrate with their machine tools to enable unmanned and automated manufacturing operations. All major equipment is controlled by OKUMA's proprietary OSP (OSP P200/P300 series) control systems.

Differentiator

Problem solved

Functional benefit

Products and services

• CNC Lathe NC旋盤 (LB series: LB3000 EX, LB4000 EX) OKUMA CNC lathes (LB3000 EX with C-axis, OSP P200LA, 410mm max diameter; LB4000 EX with T or C configuration, OSP P200L, 480mm max diameter) used to produce precision turned components for customers.
• Vertical CNC Lathe V80R OKUMA V80R vertical CNC lathe controlled by OSP P300L, with maximum machining diameter 800mm and 700mm center distance, for large-diameter precision turning.
• Vertical Machining Center MX/MB series OKUMA vertical machining centers (MX-45V with 2APC, MB-46V with rotary table, MB-46VB, MB-66VB) controlled by various OSP systems, for precision milling of prismatic parts.
• Horizontal Machining Center MA series (MA-500H, MA-600H) OKUMA horizontal machining centers (MA-500H, MA-600H with 2APC) controlled by OSP E100M or OSP P200M, with table sizes from 500x500mm to 630x630mm.
• Horizontal Machining Center MB-8000H Large OKUMA horizontal machining center MB-8000H with 2APC, OSP P300MA control, and 800x800mm table size, installed December 2020 for heavy-duty precision machining.
• Gantry Machining Center MCV/MCR series OKUMA gantry-type machining centers (MCV-A, MCV-AII, MCR-BIII 25x65) controlled by OSP 7000M or OSP P300MA, with table sizes up to 2000x6500mm for large-format workpiece machining.
• Cylindrical NC Grinding Machine GA-34FII OKUMA GA-34FII cylindrical NC grinding machine controlled by OSP U20G, used for precision outer-diameter and end-face grinding with tight dimensional and surface-finish specifications.
• Loader Beam Processing Machine (ローダービーム加工専用機) Specialized KIRA machine for processing loader beams with FANUC SERIES 0i-MD control, capable of processing beams from 100mm to 200mm square cross-sections up to 10 meters in length.
• Automation System (Loader and Work Table) 自動化システム（ローダー） Automation system comprising loaders and work tables for material and finished-product handling, designed to connect with CNC machine tools to enable unmanned and automated production; supports inversion devices, OK/NG judgment devices, and material identification / finished-product measurement as configurable options for manufacturing customers.
• NC Cylindrical Grinding and Precision Parts Processing Services Contract NC cylindrical grinding and precision parts finishing services performed on OKUMA GA-34FII and related equipment, providing tight-tolerance outer-diameter, end-face, and surface-finish work for components requiring high dimensional accuracy.

Quantifiable outcome

• 122 annual leave days per year (2022 actual)

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered core and minor.

• OKUMA CorporationcoreStrategic or Co-development Partner · 1 April 2018OKUMA Corporation (world-leading CNC machine tool manufacturer) became the parent company of Jindai Iron Works in April 2018. Jindai has served as a partner factory for 60 years, manufacturing machine tool components and assemblies to OKUMA's strict quality and productivity standards. As a subsidiary, the company operates under OKUMA's technical specifications and quality systems.
• Tono Shinyo Kumiai (Tono Credit Union)minorOthersPrimary transaction bank providing banking services. Located at Furui Branch.
• Juroku BankminorOthersMajor regional bank providing financial services. Located at Furui Branch.
• Mitsubishi UFJ BankminorOthersMajor Japanese city bank providing corporate banking services. Located at Tajimi Branch.
• Gifu Shinyo Kumiai (Gifu Credit Union)minorOthersRegional credit union providing banking services. Located at Mino-Kamo Branch.
• Ogatomihiraku Kyodu Ginko (Ogatomihiraku Joint Bank)minorOthersRegional bank providing financial services. Located at Mino-Kamo Branch.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• DMG Mori: Global leader in CNC turning and milling machines with a broad product portfolio. Compares to Jindai as a CNC machine tool builder serving similar manufacturing customers, though at a much larger scale and with proprietary control systems.
• Mitsubishi Heavy Industries (Industrial Machinery): Large diversified industrial conglomerate with machine tool offerings including machining centers. Comparable in CNC machine category but operates as part of a much broader industrial portfolio rather than a focused partner factory model.
• Haas Automation: Largest American CNC machine tool builder offering vertical machining centers, lathes, and automation. Comparable product categories to Jindai, though Haas pursues a high-volume, lower-cost strategy versus Jindai's precision-custom niche.
• Makino Milling Machine Co. Established Japanese manufacturer of CNC machining centers and EDMs. Comparable to Jindai in product category and customer base (precision metalworking manufacturers), with a stronger direct-sales brand presence.
• OKUMA Corporation: Parent company and one of the world's largest CNC machine tool manufacturers. Jindai operates as OKUMA's dedicated partner factory, making them directly comparable as CNC machine builders but with vastly different scale.
• Yamazaki Mazak: Major Japanese CNC machine tool manufacturer offering lathes, machining centers, and multi-tasking machines. Directly comparable product overlap with Jindai's CNC lathe and machining center portfolio, but Mazak operates globally with its own proprietary controls.
• Doosan Machine Tools: Korean CNC machine tool manufacturer offering machining centers, lathes, and automation. Comparable product portfolio serving similar precision manufacturing customers, particularly in Asian markets.

Direct peers

• Tsugami Corporation: Japanese precision CNC lathe and machining center manufacturer, comparable in scale and product focus to Jindai. Both serve precision manufacturing customers, though Tsugami operates more independently with its own global brand.
• Nakamura-Tome Precision Industry: Specialized Japanese CNC lathe and multi-axis turning center maker. Directly comparable to Jindai's CNC lathe and turning focus, serving similar precision metalworking customers with similar machine tool categories.
• Takisawa Machine Tool Co. Japanese CNC lathe and turning center manufacturer with a comparable product portfolio to Jindai's lathe offerings. Similar mid-scale positioning serving precision manufacturers in Japan and globally.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 Jindai Iron Works Co