Maa-Chan no Nikkichouマアちゃんの日記帳; マアチャントトンチャン; Diary of Ma-Chan; The Diary of Machan

Maa-chan's Diary is the first manga created by Tezuka Osamu. He authored it in 1946, and it ran in Shokokumin Shinbun (Mainichi Elementary Schoolchildren's Newspaper). It follows the life of a little preschooler named Maa-chan, who lives in post-war Japan.