Japanese Comics, Which are one of Cool Japan promotion program, aiming to support Japanese contents business, have been attracted attention from abroad, Especially, most international students motivated to study Japanese because of an interest in pop-culture, the comics and anime. Based on this background, the purpose of this paper is focused on analyzing statistically scripts and onomatopoeia which are constituents of comics by means of natural language processing. We discussed lexical variety and balance between scripts and onomatopoeia for four categories in comics, information and knowledge by those analysis and future works.