I like the original idea. However, I’d also raise the price of the Industrial Complex to 18 IPC. Maybe even as much as 20 IPC. You’ll recoup that over the next few rounds from increased income from the territory, and you are, in effect, increasing the power of that Industrial Complex by a factorial. Instead of 2 tanks, you can put out 3 tanks. Instead of 3 infantry, you can put out 3 infantry and a fighter. Etc.
And yes, this will most likely help Japan way more then any other nation. Though, the S. African IC will be a lot more powerful now, if you go that route. mwuhahahaha