The guns on the Ki-44 would not be good for AT work,if memory serves it was an extremely low velocity gun,and not so much a gun as a automatic rocket launcher the bullet contained the propellent in it as well as the explosive(no brass or casing),one had to get so close to the target to have a snowballs chance in hell of hitting it that it was considered suicidal to use, this coming from the Japanese! themselves.
Brady
I would like to se more Japanese planes added though,they had some real cool ones,especially now that the Sea is going to play a part in all this.