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Quality Assurance System

Quality Assurance in Design and Development

Status of Quick DR Education

Kubota endeavors to prevent quality problems, and a representative activity in this effort is the initiative to strengthen design reviews. Incorporating the DRBFM* approach, we discuss, test and verify even the smallest incidental change when developing new products, in order to prevent quality problems from arising therefrom.

  • Quick DR is a method of preventive action of potential problems by focusing on incidental changes in design and development.

Quality Questionnaires

We conduct quality questionnaires to encourage employees to volunteer information about issues related to quality. This year we extended the boundary of the questionnaire to include Group companies in Japan and overseas.

Quality Training

We held training to educate employees about the necessary knowledge, approach, and actions for quality assurance and quality management.

Training name Number of sessions Number of recipients
New recruit training 1 170
Technical new recruit training 2 126
New supervisor training 2 42
New foreman training 1 12
Internal auditor training course 6 74
FMEA training 1 7
Quality assurance course 1 10

Internal Audits on Quality

The Kubota Group has systematically carries out the following audits.

  • Quality Audits:Audits to improve the quality management system aimed at providing better quality products and services.
  • Quality Compliance Audits:Audits to ensure compliance with laws, public standards, and contracts with customers.
  • Cross Audits:Audits to improve independence and appropriateness of ISO 9001 internal audits, and to improve the competence of auditors.
  • Audits at Short Notice

Raising Awareness of Safety, Environment, and Quality

Safety, Environment and Quality Forum (November 20, 2018)

Kubota held the Safety, Environment and Quality Forum for the management team. Yoshinari Consulting representative director Hideki Yoshinari was invited as a lecturer, to provide lectures about risk management to enable proactive management, on the theme of “Risk Management that the Management Team Should Keep in Check.”

Recent Recall Status (as of January 14, 2020)
  • Recall of ER combine harvesters: Total 873 units (began February 25, 2019)
  • Recall of ER combine harvesters: Total 1,722 units (began February 25, 2019)
  • Recall of ER combine harvesters: Total 3,533 units (began April 2, 2019)
  • Recall of M7 series tractors: Total 281 units (began April 4, 2019)
  • Recall of MR, M720W tractors: Total 1,941 units (began April 25, 2019)

QC Circle Activity

QC Circle activities Presentation Competition (November 6, 2019)

For the QC Circle activities Presentation Competition held this fiscal year, 19 circles selected from 763 Kubota circles (domestic and overseas) participated. Circles producing outstanding results participated in the QC Circle National Competition.

ISO 9001 Certification Status (As of December 31, 2019)

Kubota [All Kubota divisions have acquired ISO 9001 Certification.]

Business divisions Offices (excerpt)

Certification scope

Date of
Farm and Industrial
Machinery Consolidated
Division and Procurement
Headquarters, Quality
Assurance Headquarters
(Departments affiliated with
the Farm and Industrial
Machinery Consolidated
Head Office
Sakai Plant
Sakai Rinkai Plant
Okajima Business
Tsukuba Plant
Utsunomiya Plant
Hirakata Plant
Kyuhoji Business
Design, development, and manufacture of agricultural
machinery, construction machinery, engines and related
equipment for all the above
Jun. 1994 LRQA*1
Farm Machinery Products
and Post-Harvest Division
(Precision Equipment
Business Unit)
Kyuhoji Business
Design, development, manufacture, and management of
installation services for electronic scales, including load
Aug. 1994 DNV*2
Pipe Systems and
Infrastructure Division
Hirakata Plant
Hanshin Plant
Design, development, manufacture, and associated
services of ordinary steel, stainless steel, heat-resistant
steel and fired materials (ceramics, metals, composites)
for rollers, tubes, pipes, fittings, spools, steel columns,
steel piles, sleeves, cylinders, and ordinary cast
products, as well as rollers for pressing and non-metallic
cast products (titanium oxide compounds).
Mar. 1993 LRQA
Ichikawa Plant Design, development and manufacture of spiral welded
steel pipes
Jul. 1998 JICQA*3
Hanshin Plant
Keiyo Plant
Design, development, manufacture, sale, construction
work, and associated services for the following:
  1. Ductile iron pipes, fittings, accessories and related
  2. Other ductile iron products and related products
Jan. 1999 JCQA*4
Pipe Systems and
Infrastructure Division
Environmental Solutions
Hirakata Plant
(including KUBOTA
Kiko Ltd.)
Business administration, research and development,
design and development, manufacture, operation,
operation technologies, purchasing, construction and
installation management, test operation and services
related to sewage treatment and water purification
plants, valves, gates, pumps, pump stations, and
products and equipment
Oct. 1997 LRQA
Environmental Solutions
Shiga Plant
Kyuhoji Business
Center (including
KUBOTA Membrane
Design, development, and manufacture of small plastic
water treatment tanks and bath tubs; design,
development, and contract manufacturing management
of medium- to large-sized water treatment tanks; and
research and development, design, manufacture, and
after-sales services for filter membrane units, membrane
cartridges, and all related replacement parts.
Apr. 2003 JUSE*5
Tokyo Head Office
Hanshin Office
Business administration, operation, operating
technologies, research and development, purchasing,
manufacture, inspection and testing, construction and
installation management, test operation, and services
related to sewage and sludge treatment, water
purification and wastewater treatment facilities,
products, and equipment
Jul. 2014 Intertek*6
  • *1.LRQA: Lloyd’s Register Quality Assurance Ltd.
  • *3.JICQA: JIC Quality Assurance Ltd.
  • *4.JCQA: Japan Chemical Quality Assurance Ltd.
  • *5.JUSE: Union of Japanese Scientists and Engineers
  • *6.Intertek: Intertek Certification Ltd.

Affiliates in Japan


Certification scope

Date of
Kubota Systems Inc.
  • Consigned development of software products and software packaging, design, develop and construct network structures, and maintenance services
  • Information system operation, and operation and maintenance of networks
  • Sales of purchased products (software products, computer-related equipment)
May 1997 BSI-J*7
Kubota ChemiX Co., Ltd.
  • Design, development and manufacture of plastic pipes, joints and accessories, and design, development and manufacturing management of metal products for water supply, sewage, and construction equipment, and technical support services for these products
Apr. 1998 JUSE
Nippon Plastic Industry Co., Ltd.
  • Design, develop and manufacture of hard vinyl pipes and secondary processed products
  • Design, develop and manufacture of polyethylene and other plastic pipes
  • Design, develop and manufacture of polystyrene/polyethylene and other plastic sheets/plates
Dec. 1998 JSA*8
Kyushu KUBOTA Chemical Co., Ltd.
  • Manufacture of synthetic pipes for water supply, agricultural water, sewage, electric power, and construction machinery
Oct. 1999 JUSE
  • Design, construction and maintenance management of environmental conservation facilities
Jan. 2000 BCJ-SAR*9
Kubota Environmental
Service Co., Ltd.
  • Design, construction, maintenance and servicing of plant facilities (including onsite facilities and equipment) for water supply, sewer drainage, solid waste processing, excreta disposal and garbage
Feb. 2000 MSA*10
Kubota Air Conditioner Co., Ltd.
  • Design, develop, manufacture and ancillary services for large-scale central air-conditioning and heat-pump air-conditioning systems
Feb. 2000 JQA*11
Kubota Pipe Tech Co.
  • Construction and construction management of various pipelines
  • Investigation and diagnosis of pipelines and attached facilities
  • Installation training for fittings and pipe laying
  • Inspection and repair of valves and peripheral equipment
  • Pipe-laying equipment rental
Mar. 2002 JCQA
Kansouken Inc.
  • Sales, design and develop package software for supporting water-supply business
  • Support operation of package software for supporting water-supply business and provide data-input service
  • Provide survey and consulting services for water network
Apr. 2004 JCQA
Kubota Seiki Co., Ltd.
  • Manufacture of hydraulic valves and hydraulic cylinders for agricultural and construction machinery, transmissions for off-road vehicles and agricultural machinery, hydraulic pumps for off-road vehicles, agricultural machinery and construction machinery, and hydraulic motors for construction machinery
Apr. 2007 LRQA
Kubota Construction Co., Ltd.
  • Design and construct civil engineering structures and buildings
Dec. 2011 JQA
  • *7.BSI-J: BSI Group Japan K.K.
  • *8.JSA: Japanese Standards Association
  • *9.BCJ-SAR: The Building Center of Japan
  • *10.MSA: Management System Assessment Center Co., Ltd.
  • *11.JQA: Japan Quality Assurance Organization

Overseas Group companies


Certification scope

Date of
Kverneland Group Operations
Norway AS
  • Development, production and sales of farm implements for soil cultivation
Nov. 1993 DNV GL
Kubota Materials
Canada Corporation
  • Design, development and manufacture of cast steel including stainless, heat resistant and corrosion resistant alloys, in the production of steel castings and fabricated assemblies, as well as the manufacture of non-metallic mineral products (titanic oxide compounds)
Feb. 1995 SGS North
P.T. Kubota Indonesia
  • Manufacture of internal combustion engines
Jan. 1998 LRQA
Kubota Manufacturing
of America Corporation
  • The manufacture and distribution of farm implements, lawn tractors, sub-compact and RTVs
Dec. 1999 DEKRA
Kubota Industrial
Equipment Corporation
  • The manufacture and distribution of farm implements and assembly of tractors
Dec. 2005 DEKRA
Kubota Saudi Arabia
Company, LLC
  • Production of cracking coils for petrochemical companies, reformer tube for refinery and fertilizer companies.
    Valve maintenance for industries
Technology Co., Ltd.
  • Manufacture of casting iron parts
Oct. 2012 MASCI*12
(Thailand) Co., Ltd.
  • Manufacture of diesel engine
Oct. 2013 LRQA
Corporation Co., Ltd.
  • Manufacturing of farm tractor with and without wheel and tire including
    transmission and front axel, agricultural machinery (combine harvester),
    implement (rotary tillers, slasher)
Feb. 2014 LRQA
Kubota Engine (Wuxi) Co., Ltd.
  • Manufacture of water-cooled multi-cylinder diesel engines used in
    industrial machinery and agricultural machinery
Nov. 2014 SGS United
Kubota Construction Machinery
(Wuxi) Co., Ltd.
  • Manufacture of hydraulic crawler excavators
    (operating weight less than or equal to kx175 type)
Dec. 2014 SGS United
KUBOTA Precision
Machinery (Thailand)
Co., Ltd.
  • Manufacture of transmission assembly and linkage hitch hydraulic
    cylinders for agricultural tractors
Jul. 2015 LRQA
Kubota Baumaschinen
  • Development, distribution, procurement, manufacturing and service of
    construction machines
Feb. 2016 PÜG mbH
Kubota Sanlian Pump (Anhui) Co., Ltd.
  • Design and manufacture of clean water pump, sewage pump, axial flow
    pump, mixed flow pump.
May 2016 CCS*13
KUBOTA (U.K.) Ltd.
  • The provision of groundcare, agricultural and construction machinery through an international dealership network
Aug. 2016 CQS*14
Kubota Europe S.A.S.
  • Tractor reassembly: Local market application
Sep. 2016 Apave
Kubota Farm Machinery
Europe S.A.S
  • Production and shipping of agricultural tractors, technical assistance and spare parts
Feb. 2017 BUREAU
Kubota Agricultural Machinery
(Suzhou) Co., Ltd.
  • Design & manufacturing of harvester, transplanter; manufacturing of tractor
Apr. 2017 CAM
Kverneland Group
Manufacturing Lipetsk
  • design, manufacturing and delivery of Seeding combinations AIRSEEDER; Cultivators CULTIBAR; Mechanical universal pneumatic precision seed drills OPTIMA, MONOPILL; Fertiliser spreaders EXACTA; Mower conditioners and rotary rakes TAARUP; Pneumatic seed drills DG, DGⅡ; seeding combinations MSC; Field spayers Explorer, IXtrack; Trainling/Semi-mounted reversible ploughs PN/RN; Universal trailers, universal hitches, spreader trailers; Disc harrows Qualidisc; Seeders Miniair Nova; Reversible ploughs 150 S/B; Big bag lifters Exlift; Cultivators CTC Maxi; Sub-Soiler Great Plains SS1700; Cultivators Great Plains 8539 FCF; Seed drills Great Plains NTA 3510
Apr. 2018 IQNet
Kubota (Deutschland) GmbH
  • Sales and customization of tractors, machines for ground care, attachments, spare parts, engines, engine accessories, service and customer support
Sep. 2018 EQ ZERT
KUBOTA Turkey Makine Ticaret
Limited Sirketi
  • Manufacture of tractors and power tiller
Sep. 2019 LMS
  • *12. MASCI: Management System Certification Institute (Thailand)
  • *13. CCS: China Classification Society
  • *14. CQS: Certified Quality Systems

Certification status among companies whose primary operation is manufacturing

Of the 39 Kubota Group companies whose primary operation is manufacturing, 24 have acquired certification.