Japanese Army-Navy cooperation improves aircraft and logistics

What if rivalry between the Japanese Army and Navy had been competitive rather than mutually hostile before the Second World War?

Japan could develop better aircraft and systems and organise its logistics more sensibly, increasing Allied casualties without changing the expected outcome.

A competitive but less hostile relationship could improve Japanese aircraft development. Other technical systems and supply arrangements could also become more coherent. Those improvements would make the war more costly for the Allies. The expected final outcome remains a Japanese defeat.