Japan by J2 can get a major swing in economy……Ill lay it all out
J1 purchace 3 transports
Japan makes the standard China moves
all navy save a Carrier from seazone 6 to carolines including transport and one inf
transport from SZ 19 inf and art from manchuria to SZ 36 (kwangsi) with remander of navy
transport from SZ20 moves to sz19 picks 2 inf from manchuria back to sz20 unloads Kangsi
now your set up for J2
make a navel purchace
If USA stayed in Hawaii you can smack them hard from Carolines or you can smack Anzac if USA retreated, the transport can take solomans, transport in SZ20 can grab the inf from Okinawa place in guam(5 or 7 NO), transport in SZ36 takes Borneo, Inf from Kangsi and some planes take HongKong. Inf in Siam take FIC, Navy in SZ 36 moves to Phi with 3 transports. You should still have enough ground and air around to kill china and close the burma road. You should have enough ground and transports to take the DEI or most of it next turn. So…
In the least Japan has made gains on China, stopped 4 allied NOs gained one themselfs, destroyed at least one navy and is set up for DEI. And really hampered Anzac and UK Economy all with at least 2 turns before USA can get anywhere. Japan should be making close to 50IPC a turn.