Numeral classifiers are taught at the primary level in Japanese language education. However objects that are countable by numeral classifiers are not limited to the basic words taught at the primary level. Through researching drama scripts, I examined the adequacy of the way the numeral classifier "Hon" is taught in Japanese textbooks. The numeral classifier "Hon" can count not only things that are long and thin, but also things that have a long and thin image, like cassette tapes. This cognitive element makes individual study difficult, emphasizing the need for numeral classifiers to be taught with a textbook in the classroom.
