Q&A · 1:06:54-1:07:09

Evidence for a Japanese 20-inch gun test remains contradictory

Most sources deny a complete test, but a translated Japanese source suggests the program may have progressed further.

Historical Method Japanese Navy Naval Gunnery Super Yamato

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Question

Did Japan fully test a 20-inch gun for the Super Yamato designs?

Short answer

Probably not according to most sources, though one translated Japanese account suggests a test may have occurred.

Notes

The record does not support a firm conclusion. The prevailing account says no complete test occurred, while one translated source provides enough contrary evidence to keep the question open.