Infrastructure and fuel formed connected limits on Japanese naval power. Japan did not necessarily need synthetic production to replace every imported barrel, but it did need enough domestic output to establish a dependable operating baseline. External supplies could then supplement that foundation instead of carrying the entire burden. Fuel production becomes a readiness issue because a fleet unable to afford routine movement and training enters war with its options already narrowed.
Notable Point · 1:01:58-1:02:24
Synthetic fuel as Japan's minimum naval operating base
Japan needed a dependable domestic fuel source sufficient to sustain routine operations before imported stocks could support a larger naval campaign.