Maa-chan no Nikkichou

This is a 4-strip cartoon that appeared in a newspaper, featuring the pre-school boy Ma-chan. Cheerful and naughty Ma-chan and his friend Ton-chan are always arguing.
This work strongly reflects the situation immediately after the war: Ma-chan wants to learn A-B-Cs from the stationed American soldiers, rather than the phonetic a-i-u-e-o from his father.
(Source: tezukaosamu)