And, fair enough!
But there doesn't to be much education on any side of the aisle about the 1000-or-so years leading up to their mutual antagonism.
I don't think that anyone is served by having sections of their history books snipped out - and the Japanese are no saints in this regard either. (Of course, I say this in the US, now, when some people are trying to have literature and history books snipped out)
https://en.wikipedia.org/wiki/Sakoku
The Qing dynasty was on its last legs, following the disruption of the Opium wars, the chaos of the Taiping and Boxer rebellions, and the nascent, internal modernization movements. The independence of Korea's Joeson dynasty was put to an end when Yi Un was put under Japanese control by Ito Hirobumi in 1907. Taiwan quickly transitioned from being a Chinese Vassal state to a Japanese one. The Philippines had been colonized by the Spanish for a few hundred years, then the Americans in the period leading up to the war. They were able to so quickly build an empire because the countries around them were in a poor position to resist their sudden outburst of aggression.
The “Supernova in the East” podcasts might be a good start.