Reference books by Momoko Sakura for learning idioms and four-character idioms from the "Chibi Maruko-chan" series. - Title: Chibi Maruko-chan's Idiom Classroom - Title: Chibi Maruko-chan's Four-Character Idiom Classroom - Author: Momoko Sakura - Author: Momoko Sakura - Series Name: Chibi Maruko-chan - Series Name: Chibi Maruko-chan No writing inside. Please understand that these are used items with some folds, etc.