Konjyakumonogatarisyu(今昔物語集) is the good source in the middle age in Japan. This thesis makes report about how the Chinese character was used, they are in 30th story from the first story of "Konjyakumonogatarisyu(今昔物語集)" volume 2. The results of the investigation is recorded as follows: one chinese character in the single word is 87.4%, two chinese characters in the single word is 11.1%, more than three chinese characters in the single word is 1.5%. And the noun is often one chinese character in the single word. On the other hand, a lot of more than two chinese characters in the single word is in the verb.