From: Upstate New York USA
If you don't want to lose your carriers, don't fight with them. Keep them at home.
To echo Cribtop - As the Japanese, having an intact KB is a beautiful thing. But you can't put them in the museum to preserve them forever. They are costly to build and maintain, and at some point, you need to put them at risk in the engagements that will justify their existence, just as your opponent must do. That means losing some of them. Just make sure you risk them in important fights, and that doesn't mean only fights you are sure to win.
As the war goes on you are sure to lose more, either to an increasingly powerful carrier force, land-based air, or submarines, in a battle royale or an ambush. Get the best use out of them while you can, while not risking them for something that's not strategically important.
Smarter not harder!
"It's all according to how your boogaloo situation stands, you understand."