Hydraulic pumps, cylinders, gearboxes, and other devices used to power heavy equipment such as construction, industrial, and agricultural machinery
| 1941 | Ikuji Koretsune founds a clothing factory for the manufacture of military specification work clothes at 350 Nishiyokoda-cho, Kasai, Hyogo. |
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| 1946 | The company name is changed to Koretsune Hifuku and the sales and manufacture of products made from woven fabric begins. |
| 1969 | The company name is changed to Koretsune Seiko Ltd. and a new iron-working business is founded. |
| 1972 | A business relationship is established with Mitsubishi Heavy Industries, Ltd. Akashi factory. (Currently the Caterpillar Japan, Ltd. Akashi office.) |
| 1975 | Manufacture of hydraulic cylinders begins. |
| 1978 | A business relationship is established with Mitsubishi Heavy Industries, Ltd. Shimonoseki shipyard. |
| A business relationship is established with Mitsubishi Agricultural Machinery, Ltd. | |
| 1981 | Factory space is expanded due to increased orders. |
| 1984 | Factory space is expanded to accommodate the start of manufacture of gearboxes. |
| 1986 | Operation of a non-polluting plating process begins. |
| A business relationship is established with Mitsubishi Heavy Industries, Ltd. Takasago factory. | |
| 1987 | A business relationship is established with Kawasaki Heavy Industries, Ltd. Banshu factory. (Currently KCM Corporation.) |
| A business relationship is established with Mitsubishi Heavy Industries, Ltd. Mihara factory. | |
| 1989 | Factory space is expanded due to increased orders. |
| A business relationship is established with Kawasaki Heavy Industries, Ltd. Nishi Kobe factory. | |
| 1990 | A business relationship is established with Kobe Steel Works. (Currently Kobelco Cranes Co.) |
| 1991 | A business relationship is established with Shin Caterpillar Mitsubishi, Ltd. Sagami office. (Currently Caterpillar Japan, Ltd. Sagami office.) |
| Company housing is built in Kasai Heights. | |
| 1992 | Company resort facilities are built in Kojima, Hinase-cho, Okayama. |
| 1993 | Headquarters building is built. |
| 1996 | Company housing for single employees is built in Kasai Heights. |
| 1997 | A new factory is built to accommodate the manufacture of hydraulic pumps. |
| 1999 | Operation of the Koretsune Production System (KPS) begins. |
| A business relationship is established with Mitsubishi Heavy Industries, Ltd. Sagamihara factory. | |
| 2000 | Certified as ISO 9000 compliant. |
| 2003 | A business relationship is established with Kobelco Construction Co., Ltd. |
| 3-D CAD system is introduced. | |
| A new testing facility is built for the introduction of a hydraulic cylinder durability test bed. | |
| 2005 | The Kasai Minami factory is built in Kansai Minami Industrial Park to accommodate increased orders. |
| 2006 | A business relationship is established with Kubota Corporation. |
| 2007 | KS Work, Incorporated is established. |
| A new paint factory is built due to increased orders. | |
| 2008 | A China sales office is established in Hanzhou, China. |
| Factory space at KS Work is expanded due to increased orders. | |
| 2009 | A business relationship is established with Hunan Sunward Intelligent Machinery (China)
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| Certified as ISO 14001 compliant. | |
| 2010 | A business relationship is established with IHI Construction Machinery, Ltd. |
| A business relationship is established with Caterpillar Xuzhou Ltd. (CXL) | |
| Koretsune Hydraulic Machinery (Hanzhou) Co., Ltd.is established in Hanzhou, China. | |
| KORETSUNE SEIKO VIETNAM CO., LTD is establish in Bac Giang Province, Vietnam. |
Headquarters 〒675-2335
211 Nishiyokota-cho, Kasai, Hyogo, 675-2335 JAPAN
Tel: 0790-46-0212 Fax: 0790-46-1605
Kasai Minami Factory 〒2001-44
Abiki-cho, Kasai, Hyogo, 675-2113 JAPAN
Tel: 0790-49-3232 Fax: 0790-49-3255
