What turn is the most optimal for Japan to attack ?
Turn 1. With some luck, Japan may pull through a Blitzkrieg and conquer NSW, wich is a capital, so Japan got 10 IPC plus a 5 IPC NO for a capital, and ANZAC cannot buy or place units for next turn. Also Malaya will be down, so UK will not get any NO’s, and if Japan place a major factory there the next turn, India is soon to fall. Japan buy 3 trannies in T1, and in T2 takes Phillipines, Kwangtung and the East Indies. It will be a fast game, but much gambling. If bad dice or clever Allied play, Japan will fall fast.
Turn 2. Now Japan have time to buy more trannies, and get the forces in better positions for a large scale attack. They will also denie UK and ANZAC any NO bonus. This is the safest turn to launch the attack.
Turn 3. If Japan sit and wait too long, and use time trading with China, UK will get two NO’s in T2 and 37 IPC in income and ANZAC will get 15 IPC in income, while Japan still recive less than 30 IPC. Also the US forces will be in strategically good positions in the South Pacific. Japan might get a hard time pulling a T3 attack off.
T4. Now the Allies will attack Japan.