Before World War Two, Japanese commercial trucks were use by the military's of Japan. However those trucks were very poor and Japan could not rely on them for military service. So Japan decide for a solution for a military trucks and supported private motorcar companies and made them develop a military 6-wheeled truck. It was the Type 94 6-Wheeled Truck from the Isuzu company which was taking in production and service. Developed in 1934, or in Imperial year 2694, the Type 94 Truck was reliable and had a good performance. Type 94 was produced in the largest numbers among the Japanese trucks and used widely until the WWII ended. It was used as infantry and supply support also as artillery tractor for the light guns like the 47 mm Type 1anti-tank gun.
There are two standard variants. But you know how it works in a war with variants.... there are more then the papers say! ;) The gasoline powered version with the 6-cylinder L head water cooled engine, wich producing 43 hp and make a top speed of 60 km/h, and the 4-cylinder diesel engine, wich producing roughly the same hp and with a maximum speed of 69 km/h.