British submarines and Japan's inadequate escort fleet

Would British U-class submarines have forced Japan to improve anti-submarine warfare sooner?

Japan might try harder, but too few escorts meant an Anglo-American submarine campaign would mainly speed up its losses.

Japan possessed some useful anti-submarine methods but lacked enough escorts to apply them across its sea lanes. The problem was force scale rather than complete ignorance of anti-submarine warfare. British U-class boats joining the American campaign would expose the same shortage across more convoy routes. They would therefore accelerate Japan's shipping losses rather than produce a fundamentally different strategic outcome.