Chibi Maruko-chan
Obana began her manga career as an assistant to Momoko Sakura, the creator of "Chibi Maruko-chan". In 1990 she debuted with a one-shot manga, "Mado no Mukō", which was published in the autumn 1990 issue of "Ribon Bikkuri". Later stories would appear in "Ribon Original" and "Ribon" magazines.