@frankmac4
I’ve never played J1 (or any Japanese declare war first strategy), so I’m not sure about that. The main problem is if Japan doesn’t do J1, they can wipe out the Soviets if they leave the eastern armies in Amur.
What is smart though, is sending forces to China. All it takes is British support from India driving northwards and Soviet tanks, mechanised infantry, and aircraft moving eastwards to totally defeat the Japanese army. It’s surprising how only 2 tanks, 2 fighters, and 1 tactical bomber can do in the vast fields of China, where Japan doesn’t have much to counter. Sometimes, only one or the other is required to tip the balance towards the Allies. The Japanese air force, whilst formidable, against decent Allied players cannot hope to bomb enough land units to make a difference.
Such a major difference in the war can be achieved by only a few units when those same exact forces would just disappear under Germany.