The poster below was created in the late 1930s:

children dancing and waving german, italian, and japanese flags. above are portraits of adolf hitler, emperor hirohito, and benito mussolini.
public domain

what is the message of this japanese propaganda poster?

germans and italians are friends to the japanese.
japanese children should do everything they can to support the war.
victory for the axis powers is a certainty through everyone's support.
diplomatic relations between japan, germany, and italy will begin through marriage.