1973
Founded "Kyoei Shoko Co., Ltd."
1976
Reorganized and renamed to "Kyoei Drilling Equipment Co., Ltd."
1982
Developed and began selling the CorePack Tube® R model
1983
Developed and began selling the CorePack Tube® S model
1988
Changed the company name to "COREPACK Co., Ltd." and constructed a new head office building
1991
Factory established
1992
Developed and began selling the CorePack Tube® NEW S model
1994
Opened Osaka Sales Office
Developed and began selling the CorePack Tube® REX for hard rock
1995
Design registration of a vinyl bag named "Pack sleeve"
1996
Utility model registration for CorePack Tube® REX
1997
Developed and began selling CorePack Tube® SLIM and "Uchikomi Packs"
1998
Started selling Super Diamond Ring Bit
Patent registration for vinyl bag named "Pack sleeve"
Utility model registration for "Setting Stand"
2000
Developed and began selling CorePack Tube® 86 Triple
Patent registration for "CorePack Tube® NEW S"
Developed and began selling RS (Switching Parts)
2003
Closed Osaka Sales Office
Started manufacturing and selling Diamond Bit
Developed and began selling the CorePack Tube® "Uchikomi Bunkatsu Kun"
2004
Developed and began selling CorePack Tube® 116 Triple
2005
Expanded standard compatibility for RS (Switching Parts)
2006
Developed and began selling CorePack Tube® 76 Triple
2007
Developed and began selling the reinforced version of CorePack Tube® "Uchikomi PRO"
2009
Started selling Toughness Bit Twin Circle Bit
2012
Developed and began selling CorePack Tube® 100 Triple
Developed and began selling Sand Bucket
2018
Developed and began selling Black Face Sleeve Case (made of SUS)
2020
Design and trademark registration for "HARD BELT BIT"
Developed and began selling Sampling Seal
2023
50th Anniversary
2024
Started rental of borehole cameras