Liberalization of trade brought Japan demand from abroad and the opportunity to raise Japan's technological advancements to a world-class level. The introduction of large-scale power sources took place, which accelerated development of larger equipment.
As the rezoning of rice field projects started under the supervision of the Ministry of Agriculture, the demand for a swamp bulldozer grew.
With the tagline of "The body that never sinks in mud", Komatsu developed an original crawler with low land touching pressure that made driving on swamp areas smooth. D60 lineup consisting of a bulldozer, a swap bulldozer, and a dozer shovel was completed when this model was finished.
Since its first emergence in 1951, it took only 50 years for the hydraulic shovel to establish its primary position on construction sites worldwide. Its size ranges from mini to super size depending on the scale of construction, and during the half century, it kept evolving by achieving a minimum rear-swing radius and adapting styles that would work with characteristics of each site. Mirroring the movement of a human hand, a hydraulic shovel will continue to evolve during the 21st century.