Since we have no twin engined bomber at all for the Japanese for Early or Mid war, I will say it again: We need the G4M "Betty" over any other.
D4Y "Judy" would be my next pick to give the IJN a late war dive bomber, as the B5N/D3As are the saddest kind of cannon fodder after 1943.
Single engined fighters? not a bad lineup right now, I would add the Ki-43 next. The IJAAF needs an early mid war fighter. WW2 was not just a bunch of Zeros in the Pacific, contrary to crappy tv shows and half baked mythologies.