1941

Ikuji Koretsune founded a sewing factory at 350 Nishiyokota-cho, Kasai City, to manufacture military-designated work clothing.

───────────────────────────

1946

The company changed its name to Koretsune Clothing Co., Ltd. and began manufacturing and selling textile products.

───────────────────────────

1969

The company established a new metalworking division and changed its name to Koretsune Seiko Co., Ltd.

───────────────────────────

1975

Began manufacturing hydraulic cylinders.

───────────────────────────

1984

Expanded the Nishiyokota Factory for the production of reduction gears.

───────────────────────────

1986

Started environmentally friendly plating operations.

───────────────────────────1987

Began manufacturing cylinders for advanced terminals.

───────────────────────────

1993

Constructed the Nishiyokota Headquarters Office Building.

───────────────────────────

1994

Began manufacturing adjuster cylinders.

───────────────────────────

1995

Began manufacturing hydraulic pumps.

───────────────────────────

2000

Obtained ISO9000 series certification.

───────────────────────────

2003

Expanded the laboratory with the introduction of a hydraulic cylinder endurance test stand.

───────────────────────────

2005

Due to increased orders, built the Kasai Minami Factory in the Kasai Minami Industrial Park.

───────────────────────────

2007

・Established KS Work Co., Ltd.

・Expanded the Kasai Minami Painting Factory.

───────────────────────────

2008

Expanded the KS Work Factory.

───────────────────────────

2009

Obtained ISO14001 series certification.

───────────────────────────

2011

・Established KORETSUNE SEIKO VIETNAM CO., 

　LTD. in Bac Giang Province, Vietnam.

・Established Kasai Minami No.1 Factory.

───────────────────────────

2012

・Expanded the Kasai Minami No.2 Factory.

・Began processing industrial robot parts.

───────────────────────────

2015

・Constructed the Engneering Development Center.

・Began manufacturing power dividers.

───────────────────────────

2016

・Obtained JISQ9100 certification at the Engneering

　Development Center.

・Began manufacturing hydraulic dampers.

───────────────────────────

2018

Selected as a Leading Company for Regional Future Development.

───────────────────────────

2019

・Integrated Izumi Seiki Kosakusyo Co., Ltd. into the

　Koretsune Group.

・Certified as a company promoting harmony between 　work and life in Hyogo.

───────────────────────────

2020

・Expanded the Kasai Minami No.1 Factory.

・Began manufacturing cylinder control valves.

───────────────────────────

2024

Registered for the Hyogo Industry SDGs Promotion Declaration Project.