The IJA adapted their armoured cars to run on wheels and railway tracks, this was mainly because of large expanse of areas like China, Mongolia, Manchuria and Malaya were without good roads. Rail travel allowed these vehicles to carry troops and equipment to police these regions.
At the start of the war light companies contained four platoons and a company HQ, each platoon contained three tanks and the CHQ only one. It also had a company train for maintenance and supply. Medium companies contained three platoons also containing three tanks. This changed mid-war and the number of platoons in both light and medium companies was reduced to three.
Independent tankette companies were usually issued to infantry divisions and these units were equipped with 25 tankettes.