Quality Philosophy
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KITZ Group aims to insatiably improve customer satisfaction by offering products / services with overwelming reliability.
The trustworthy brand KITZ has been established by working on the cutting-edge issues of the times, with “Do it True (Integrity and Truth)” as the first of the Conduct Guidelines as the basic philosophy. Since its founding, the company has been manufacturing products based on integrated manufacturing from raw materials, and acquiring ISO9001 certification for the first time at a Japanese company. Recent advances in digital technology, known as the second-to-second advancement, have brought significant changes to KITZ’s quality-assurance system, and have been embodied as proprietary testing equipment and process control systems that dramatically improve the reliability of our products/services.
We will continue to evolve our group-wide quality assurance system and provide products and services that satisfy our customers with an overwhelming sense of trust, without remaining at the present level.
Executive Officer, General Manager of CS Management Division
Yoriyuki Koyama

KITZ Group Quality Policy
At KITZ Group, we share our quality philosophy. This is essential for KITZ, which places a high priority on quality, to earn the confidence and satisfaction of customers. By always being conscious of this, we will enhance the brand power of the entire group and provide products and services that exceed customer expectations. We hope to be a company that will continue to develop 10 years, 30 years into the future.
Acquiring KITZ Group certification
KITZ became the first Japanese company to acquire ISO9001 in November 1989. Currently, our domestic plants have acquired JIS product certification, Pressure Equipment Directive (PED) certification, and API certification. These certifications support the quality of KITZ’s high-quality products. Overseas production bases and cooperating companies have also acquired various certifications, and we are responding to a wide range of customer needs.
Certification List
Manufacturing Plant | Certification | Certifying Authority |
---|---|---|
KITZ Corporation Nagasaka Plant |
ISO9001 | LRQA Limited |
High Pressure Gas Safety Act Mministerial approval as self inspection manufacturer |
KHK | |
JWWA Inspection Manufacturer | JWWA | |
JWWA Quality Certification Centre certified and registered Manufacturer | JWWA | |
PED/CE Marking Products Manufacturing Plant | LRQA Limited | |
PER/UKCA Marking Products Manufacturing Plant | LRQA Limited | |
AD2000-Merkblatt W0 | TÜV SÜD | |
AD2000-Merkblatt HP0 | TÜV SÜD | |
KITZ Corporation Ina Plant |
ISO9001 | LRQA Limited |
High Pressure Gas Safety Act Mministerial approval as self inspection manufacturer |
KHK | |
JWWA Inspection Manufacturer | JWWA | |
JWWA Quality Certification Centre certified and registered Manufacturer | JWWA | |
API Specification 6D / Monogram marking Products Manufacturing Plant | API | |
PED/CE Marking Products Manufacturing Plant | LRQA Limited | |
PER/UKCA Marking Products Manufacturing Plant | LRQA Limited | |
JIS Mark Certification (JIS B 2031 Gray cast iron Valves) |
JWWA | |
AD2000-Merkblatt HP0 | TÜV SÜD | |
Approval of fire protection Equipment | FESC | |
KITZ Corporation Chino Plant |
ISO9001 | LRQA Limited |
JWWA Inspection Manufacturer | JWWA | |
JWWA Quality Certification Centre certified and registered Manufacturer | JWWA | |
JIS Mark Certification (JIS B 2011 Bronze Valves) |
JWWA | |
Approval of fire protection Equipment | FESC | |
Certification of fire protection equipment and systems | JFEII |
Manufacturing Plant | Certification |
---|---|
Shimizu Alloy Mfg. Co., Ltd. | ISO9001 |
JWWA Inspection Manufacturer | |
JIS Mark Certification (JIS B 2062 Sluice valves for ordinary water piping) |
|
KITZ SCT Corporation | ISO9001 |
High Pressure Gas Safety Act Mministerial approval as self inspection manufacturer |
|
KITZ Micro Filter Corporation | ISO9001 |
JWWA Quality Certification Centre certified and registered Manufacturer | |
KITZ (Thailand) Ltd. | ISO9001 |
JIS Mark Certification (JIS B 2011 Bronze Valves) |
|
JWWA Quality Certification Centre certified and registered Manufacturer | |
PED/CE Marking Products Manufacturing Plant | |
PER/UKCA Marking Products Manufacturing Plant | |
CSA (Canadian Standard Association) |
|
FM (Factory Mutual) |
|
UL (Underwriters Laboratories) |
|
Australian Standard | |
NSF | |
KITZ Corporation of Taiwan | ISO9001 |
PED/CE Marking Products Manufacturing Plant | |
PER/UKCA Marking Products Manufacturing Plant | |
UL (Underwriters Laboratories) |
|
AD2000-Merkblatt HP0 | |
KITZ Corporation of Kunshan | ISO9001 |
AD2000-Merkblatt W0 | |
TS Certificate | |
KITZ Corporation of Jiangsu Kunshan | ISO9001 |
AD2000-Merkblatt HP0 | |
TS Certificate | |
KITZ Corporation of Lianyungang | ISO9001 |
AD2000-Merkblatt W0 | |
KITZ Corporation of Europe, S.A. | ISO9001 |
API Specification 6D | |
PED/CE Marking Products Manufacturing Plant | |
PER/UKCA Marking Products Manufacturing Plant | |
AD2000-Merkblatt W0 | |
AD2000-Merkblatt HP0 | |
Perrin GmbH | ISO9001 |
PED/CE Marking Products Manufacturing Plant | |
AD2000-Merkblatt HP0 |
As of December 1, 2022
Global Support System

KITZ Group has established a global support system to provide uniform services worldwide. In addition to Japan, we have customer support departments in Singapore, Thailand, the U.S. and China. When quality defects arise after sales, we basically respond and resolve them locally. In addition, by working with KITZ certified valve maintenance companies, we are able to respond accurately and quickly to local needs. The quality information received from the marketplace is consolidated and analyzed at KITZ Head Office to improve quality.
Achieving high quality through an integrated production system
KITZ is based on integrated production from raw materials, and produces cast materials, forged materials, and Brass rods in-house to achieve high-quality products. Although these processes require high-level technological expertise and cost, they are the most critical processes for valve, so KITZ is committed to its own production. Our experience and technologies accumulated over many years enable us to produce high quality and various materials. In addition, since all processes related to valve manufacturing are carried out in-house, when problems occur, we can quickly identify and improve the causes of the problems.


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