Komatsu and Dresser Industries established Komatsu Dresser to make mining tractors and related equipment in 1988.[6] This 50-50 ownership lasted from September 1988 to August 1994, when Komatsu bought out Dresser's share.[6] Komatsu's mining products were consolidated under the name Komatsu Mining Systems in 1997. To prevent brand-name confusion during these corporate changes, the name "Haulpak" was used for the product line Komatsu began with Dresser. The name "Haulpak" dates back to 1957 when LeTourneau-Westinghouse introduced a range of rear dump trucks known as "Haulpaks". LeTourneau-Westinghouse equipment later became known simply as WABCO equipment in 1967. The name Haulpak was an industry term that eventually became applied to any type of rear dump truck. A detailed history of the development of the Haulpak can be found in Wabco Australia.[7]

In 1989, Komatsu bought a share of Hanomag AG and since 2002 Komatsu Hanomag GmbH has been a 100% subsidiary of the global company.

During the 1990s Komatsu had a joint venture in Europe with Moxy were Komatsu designed Articulated Dump Truck were built under license for the European market by Moxy. (In 2008 Moxy was taken over by Doosan of Korea.)

FAI of Italy was invested in during 1991. As Komatsu's equity increased, the company was renamed in 1985 to FKI Fai Komatsu Industries S.p.A., which was then renamed in 2000 to Komatsu Utility Europe S.p.A. when Komatsu assumed 100% ownership