Carrier knowledge flows in both directions

What naval knowledge might flow from Japan to Britain in a continuing alliance?

The strongest prospect is joint carrier development, including Japanese participation aboard British carriers and shared experimentation with night flying and night fighting.

Technology exchange would extend beyond Japan copying British designs. Officers, crews, and designers could work together on carrier operations, allowing Japanese experience to shape British practice as well. Joint development might include night flying and night fighting. If the Germans had failed to escape at night in the altered First World War, Britain might invest less in night fighting than it did historically.