Exactly… The US is NOT invloved in the UK attack, nor in defense by the Japan counters to the UK attack.
In the next Japan move (since Japan will go before the US), Japan can either remain in that sea zone and engage the US forces, or withdraw to someplace else without attacking the US forces.
So, based on the picture, in UK’s move, Britain will attack 1 Japan AC and 2 BB’s with 1 BB and 1 TRN. (BTW: The results of that battle on average is the sinking of the UK BB and TRN with no losses by Japan)
Then, on Japan’s move, Japan can remain to engage the US AC and FIG with the forces currently in the Kwangtung sea zone, or with any additional units they wish to bring in, or they can move to another sea zone and skip that combat. (again, the average is that the US AC and FIG are killed with no losses to the Japan fleet… hits being taken on the BB’s to wound but not kill them)
BTW: I am wondering what kind of game that was to result in the land positions noted…UK in FIC, US in Kwang WITH an IC, USSR holding Manchuria… is this very late in the game after Germany was defeated, or is this mid-game with a strong KJF strategy?