During World War II, the Japanese Home Islands stood at the center of an empire, to which raw materials were sent, and from which manufactured goods, included arms, were dispatched.
Toward the end of the war, the Japanese Home Islands were blockaded and cut off from its territories, which is to say that she couldn't send arms to them.
Is it fair to say that most heavy equipment, planes, ships, tanks, heavy artillery were manufactured in, and came from Japan? But are there any parts of the empire where Japanese troops were capable of resupplying even small arms and ammunition locally? Or would the overseas territories "wither on the vine" when they were cut off from the mother country?