2nd Sino-Japanese war/ 1937 (source)
Sorry, told you things would get a bit darker…
“Regarding Taiwan, as far as I know (which is as far as wikipedia says!) Taiwan was actually a pretty alright colony during Japanese rule. As a result no major atrocities were committed on the Taiwanese people after 1930. It was during 1936 when the Japanese more aggressively tried to assimilate the Taiwanese and integrate them into the Japanese Empire.
Taiwan was not directly attacked by Japan but was strongly encouraged to assmilate into the Empire.”