Allweneedislove is correct.
So the way I see it… Japan could move the 2 destroyers during the combat phase as required, fight the American ships with different units, and than move the destroyers back into 25 during the non combat phase after the zone has been cleared. Â
Nope. Sea (and land) units that move in combat movement and/or participate in combat may not move in noncombat movement.