Resources alone cannot remove Japan's industrial geography

If Japan had enough coal, iron, and oil, could its infrastructure use them fully, or would internal logistics still impose a hard limit?

Infrastructure and geography would still be major limits because Japan lacked enough suitable, protected flat land for the ports, yards, industry, transport, and food base required.

The counterfactual supplies Japan with industrial inputs while leaving the physical country unchanged. The harder limit is a shortage of suitable flat land on which to expand ports, slipways, factories, transport links, and supporting communities. Reclamation would have to create new ground and protect it from tsunamis, prompting the joke that Dutch engineers would be needed. More protected land could support naval industry and additional agriculture. Resource access, internal logistics, geography, and civil engineering must be considered together when estimating state capacity.