Can I get a link to the rule you are referencing in regard to originally colored territories?
“Major industrial complexes can only be built on originally controlled territories (this includes upgrading minor ones). Likewise they may not be upgraded when captured. Major industrial complexes are reduced to minor when captured. The original owner of the territory may upgrade it if the territory is recaptured.”
Is all I can find on our “Alpha” ruleset. I’m not arguing, I’m just curious if Japan can build a Major on Manchuria or Kaingsu - or if it has to include the national territory icon in order to be considered “originally controlled”