Reply #75: Add to that that where we use trucks to move produce from field to town

[eyepaddle]

the Japanes used small coastal vessels of around 50 tons or so. These small craft were largely immune to submarine and air attack due to their ability to hide and stick close to shore. They were not, however immune to the mining campaign carried out B 29s. The mining of Japan's small harbors shut this coastal trade down. Mass starvation was effectively ensured.