An object classification device includes a keyword determining unit, a keyword ordering unit and a classifying unit. The keyword determining unit determines keywords for one or plural objects. The keyword ordering unit orders the plural determined keywords based on a conceptual hierarchical structure which is a structure that hierarchically represents concept of words. The classifying unit classifies the objects so as to be associated with the ordered keywords.
OBJECT CLASSIFICATION DEVICE AND NON-TRANSITORY COMPUTER READABLE MEDIUM