British plans used a circular strategy in which commerce pressure would force the Japanese fleet to come out, allowing a battle that could support an even tighter blockade. A sufficiently forward submarine base could place boats around Japan and compel the Imperial Japanese Navy either to conduct repeated destroyer sweeps or attack the base. Japan relied even more heavily than Britain on coastal movement of goods because its internal railway and canal network was less developed. Blockade would attack national distribution and endurance as well as the fleet at sea.
Notable Point · 42:46-44:03
Why Japan's coastal logistics magnified blockade pressure
A blockade could threaten Japan's internal distribution system because the country depended heavily on coastal shipping and had fewer railway and canal alternatives than Britain.