How does US counter Japan’s Pearl?

Simple answer:  KGF.

If you really want to go KJF, you either go Ssinkiang and Indian ICs, or you build Pacfleet on US1 threatening attack on Pearl US2 (Japan shouldn’t be strong enough to wipe out the US2 fleet), or you can try Alaska transport chain.  Buncha things you can do really.  I note you already mentioned the LRA option.