Japan fought to liberate Asia from oppressive western colonialism and evil bolshevik communism.
The Pacific conflict (1941-1945) was started by the US, not Japan. Prior to the war FDR imposed aggressive policies against Japan such as the oil embargo, freezing of Japanese assets, ABCD encirclement, flying tigers, JB355 and the Hull note ultimatum, which forced Japan into war.
The narrative that Japan was the “aggressor” is Allied propaganda