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Building the Future
with Technology.

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About Us

Koretsune Seiko Co., Ltd. is a manufacturer specializing in hydraulic equipment and reduction gears for construction machinery.

We manufacture and sell hydraulic cylinders, hydraulic pumps, reduction gears, and other components that power large machinery such as construction, industrial, and agricultural equipment, enabling dynamic movement.

Established : April 1969 (Showa 44)

Capital : 50 million yen

Number of Employees : Approximately 200

Site Area : Approximately 40,856m²

Factory Area : Approximately 19,835m²

Related Companies : KSWORK Co., Ltd.

        Koretsune Seiko Vietnam Co., Ltd.

        Izumi Seiki Kosakusyo Co., Ltd.

Certifications : ISO9001

               ISO14001

               JISQ9100

        (Engineering Development Center)

Bank : Sumitomo Mitsui Banking Corporation

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会社情報

👇Company introduction video (full version)

News

September 12, 2024

Received SER (Supplier Excellence Recognition) EXCELLENT from Caterpillar Inc.

March 28, 2024

We have renewed our website.

January 15, 2024

Published our initiatives on SDGs.

代表者挨拶

Message

Since our establishment in 1969, we have undergone a business transformation from traditional sewing to the current metalworking industry. Over the years, we have primarily focused on manufacturing and selling hydraulic equipment for construction machinery.

In addition, we have diversified into new fields such as industrial robot parts, hydraulic dampers for construction, and more recently, shafts for construction machinery and special bolts for gas turbines. Not only in domestic operations but also in 2010, we established a local subsidiary in Vietnam, enabling us to establish a development and production system that can flexibly respond to rapidly changing business environments and customer needs.

Furthermore, our company is guided by three management principles that form the foundation of these business activities:

  1. Challenge for fruitful future

  2. Spirit of customer first

  3. Continuous self innovation

With these three principles in mind, we aim to enhance quality, meet delivery deadlines, and reduce costs. Through our manufacturing endeavors, we seek to contribute to society while also striving for the well-being of our employees and their families in all aspects of life.

 

Koji Koretsune

President and CEO

Products

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Adjuster cylinder.tif
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Hydraulic Cylinders

Mechanical devices that produce linear motion using hydraulics, primarily used in construction machinery such as hydraulic excavators.

Adjuster Cylinders

Cylinders used to adjust the tension of the crawler tracks on hydraulic excavators.

Hydraulic Pumps

Hydraulic devices that supply pressure required for hydraulic cylinders, motors, etc., used in various applications including construction machinery and agricultural equipment.

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Industrial Robot Parts.tif
Vibration damper.tif

Reduction Gears

Devices used to control the turning motion in machines and vehicles, primarily used in construction machinery such as hydraulic excavators and cranes.

Industrial Robot Parts

Utilized in robots performing various tasks including assembly, welding, painting, and transportation.

Hydraulic Dampers

Devices used in buildings to absorb and dampen seismic vibrations, widely used in many redevelopment projects.

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Hydraulic Valves

Devices used to control the flow and pressure of oil within hydraulic systems, employed in equipment like concrete pump trucks.

Gas Balancers

Used as balancers for industrial multi-joint robots in spot welding, pallet loading and unloading, and handling of products.

主要製品

Clients

(In alphabetical order)

主要取引先

CATERPILLAR

Kawasaki Heavy Industries, Ltd.

Kobelco Construction Machinery Co., Ltd.

KUBOTA Corporation

NACHI-FUJIKOSHI Corporation

SENQCIA Co., Ltd.

YANMAR Construction Machinery Co., Ltd.

工場紹介

Factory Introduction

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    Head Office & Kasai
    Minami No.1 Factory


2001-44 Abiki-cho, Kasai City, Hyogo 675-2113, Japan
TEL 0790-49-3232
FAX 0790-49-3255
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Engneering Development Center

2001-62 Abiki-cho, Kasai City, Hyogo 675-2113, Japan
TEL 0790-49-3568
FAX 0790-49-2338
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      Kasai Minami No.2            Factory

2001-61 Abiki-cho, Kasai City, Hyogo, 675-2113, Japan
TEL 0790-49-3308
FAX 0790-49-1705
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   (Related Company)         KORETSUNE SEIKO    VIETNAM CO., LTD.

Lot D14, D15, Dinh Tram Industrial Park, Nenh Ward, Viet Yen Town, Bac Giang Province, Vietnam
TEL 0084-240-3661828
FAX 0084-240-3661919
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  Nishiyokota Factory

211 Nishiyokota-cho, Kasai City, Hyogo 675-2335, Japan
TEL 0790-46-0212
FAX 0790-46-1605
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   (Related Company)
  Izumi Seiki Kosakusyo
       Co., Ltd.


       For more details

Equipment

主要設備
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NC lathe
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Valve Testing Stand
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Machining Center
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Coordinate Measuring Machine (CMM)
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Plating Tank
お問い合わせ

Contact Us

2001-44 Abiki-cho, Kasai City, Hyogo 675-2113, Japan

(0790)49-3255

Thank you for sending.

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