A Kirov-derived missile ship against the wartime Japanese Navy

How effective would a Kirov-derived battlecruiser be against the Imperial Japanese Navy in the Second World War?

Overwhelmingly effective, because its modern anti-ship missiles would present a threat the wartime fleet could not counter.

The panel first checks whether the question refers to a viewer's modified Kirov design with both large guns and modern missiles. Under that assumption, the ship is an overwhelming out-of-context threat to the Imperial Japanese Navy. Its P-700 Granit, or SS-N-19 Shipwreck, anti-ship missiles deliver a form of attack that wartime Japanese vessels were never designed to detect or defeat. The answer is explicitly conditional on the custom design being discussed, but the wider lesson is the scale of the technology gap between modern missile warfare and a Second World War fleet.