Japan's stockpile: pilot training and aircraft protection

What should Japan stockpile in 1937?

Pilot-training aids, self-sealing fuel tanks and aircraft armor are favored for expanding and preserving its pilot pool, alongside a suggestion for 40 mm gun production equipment.

A warehouse of oil offers only a limited addition to Japan's total needs, while manufacturing equipment for 40 mm anti-aircraft guns is another suggestion. Ground simulators could expand pilot training and give recruits more experience before flight. The correction is about having enough good pilots, rather than an absence of skilled pilots. The contrast between selecting the top 1 percent and the top 40 percent illustrates the need for a broader wartime training pipeline. Self-sealing fuel tanks and aircraft armor would help trained pilots survive, with their adoption proposed while aircraft were still being developed in 1937.