|Engine type||In-line 4-cylinder, OHV|
|Max. output kW/(PS)/r.pm||-/48/4000|
|*||The specifications are those of representative model grades.|
|*||Max. output represents a net rating.|
|*||The model numbers of these vehicles are RK52.|
Although the RK52 had the same length as the RK23, its cargo bed was 625 mm longer and therefore larger. The passenger capacity (two) and the maximum payload capacity (1.5 tons) were the same as those of the RK23, and so was the 1.5-liter 48 hp engine (Type R). In addition to the truck, a route van featuring double doors in the rear was also available. The route van had a more vertical windshield than the truck's, and its headlamps were positioned higher, while the doors were moved a little toward the rear to facilitate the entry into/exit from the rear cabin. In October 1956, the model was succeeded by the RK62 which featured an enhanced Type R engine (with the output boosted from 48 hp to 55 hp) and an increased payload capacity of 1.75 tons.
|Plant||Koromo plant(now Honsha plant), Toyota Auto Body Co.,Ltd. [to Dec. 1956], Kanto Auto Works,Ltd. [from Dec. 1956]|