Q&A ยท 1:10:11-1:19:58

Japan with Kii-style battleships in 1918

A transformed Japanese battle line would combine heavy gunpower with enough speed to choose engagement terms against slower fleets.

Question

What if all Japanese battleships in 1918 became copies of the Ise and Kii designs?

Short answer

A Kii-style Japanese battle line would be fast, heavily armed, and difficult for any navy to fight, forcing major British and American reactions.

Notes

The counterfactual gives Japan a battle line capable of 29.75 knots, with ten 16-inch guns per ship and heavy secondary armament. Kii's quoted displacement is 42,600 tons normal and 48,500 tons fully loaded. Such a fleet could choose when and where to fight and disengage from slower opponents. American standard battleships are contrasted at about 21 knots with mostly 14-inch guns in 1918. Britain would also face pressure to commission fast capital ships capable of answering it. The panel expects either a very different Washington Naval Treaty or no comparable agreement. The later Number 13 design illustrates the same direction of development with eight 18-inch guns and a proposed speed of 30 knots.