Have you played and got Japans income over $100? In our games and most games I’ve heard about the Allies win or are in a position to win around turn 12-13.
On average, America can’t declare war until the end of it’s round 4, and can do nothing, until round 5.
USA - R1 = 13 (average roll) + 5 for fall of france = 18
USA - R2 = 13 (average roll) + 30 for Japanese attack on DEI/UK = 61
USA - R3 = 13 (average roll) = 74
USA - R4 = 13 (average roll) = Over 80, Declares war on Japan
USA - R5 = Usa can actually attack Japan.
So, Japan has from J1 to J5 to get to 100 IPCs.
Starts at 41 IPCs +
+5 for DEI
+5 for Singapore
+5 for Calcutta OR Sydney (you will probably lose 1 by J5)
+1 French Indo China
+8 (on average) From Chinese Territories, could be more if China is defeated
+16 from Dutch east indies territories
+1 from Rabul
+1 from New Guinea
+1 from Brunei
+3 from either Calcutta or Sydney
+1 from Bangeledesh or Queensland
+2 from Phillipines (Might as well attack this on J5)
That’s without an excursion into Russia, which is common, usually results in +5 or +6.
Japan gets to 90-100+ every game without having to put in too much effort, and before the USA can attack it.