Well, they most likely win in North America, and get crushed everywhere else
Problem is that you can't really conquer North America from Afro-Eurasia, the logistics simply don't work
The interesting question is whether Japan sticks with the Entente - while there’s no love lost with the Americans, there are benefits to the two cooperating (Especially of the Japanese put gains in the Malay Archipelago at the expense of GB before more miles & miles of miles & miles in Russia.