So wouldn't Imperial Japan be in an excellent position post SGW? Their metropol has been completely unscathed, they seemingly have almost complete domination over East and South East Asia going off of what we know about the situation over there, none of their potential major rivals (Russia, the United States, and China) are going to be in a condition to really challenge them for a long while at the very least, and (when it suits them) they're probably going to be the superpower that anti colonial partisans (or more accurately the ones rebelling against European colonialism) are going to rely on.
In fact, their situation is perhaps not to unlike the OTL United States after World War II.
In fact, their situation is perhaps not to unlike the OTL United States after World War II.