In prewar times, production of the tractor began due to the need for agricultural development. During the war, mechanization of construction was in high demand at places like airports. However, it was the birth of bulldozers that truly started the history of construction equipment in Japan.
This model was developed based on the technology of the trial sample that was made during the war. Ones from early days were still on a trial basis and had more than a few troubles, which led to suspension of production. In 1949, after fundamental improvements, full-scale production was initiated. As more improvements were implemented, the demand in the market also rose. It was around this time when the foundational method of bulldozer construction was established.
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.