I like to put my IC in Kwang because if the nasty little americans get long range air craft, they can reach any ships you build out of japan from AK. If its on Kwang then newly built ships can be out of range. Also its farther away from russia, but not that far from moscow. Plus I like it because if its on Manchiria, its on the front lines. When in Kwang if the russians americans or british make an offencive it can still hold out.