I see the point you’re trying to make, and by no means am I saying that the British were without fault, but there is a very significant difference between the the British defending their liberal democracy from Nazi domination and a largely rural, largely uneducated Japanese population being conscripted into fighting a war of aggression on behalf of a totalitarian state.
Yes and no - UK was actually a colonial empire at the time of WWII and had conquered and subjugated more land and peoples than the Japanese ever managed. While the UK itself could be termed a liberal democracy, most of its subjects had no say.
