The purpose of this paper is to clarify the functions of adverbs used additionally in the 'Amakusabanheikemonogatari" 'Amakusabanheikemonogatari "is a Japanese textbook for missionaries written by Fabian in 1592, based on the "Genkyobonheikemonogatari written in the Kamakura Era. In this paper, I point out the following points. (A) There are 119 more adverbs used additionally in the "Amakusabanheikemonogatari" compared to the "Genkyobonheikemonogatari" (B) These adverbs are classified into three types, the modal adverb, the degree adverb, the state adverb. (C) Among these three, the modal adverb is the most adverbs used additionally in the "Amakusabanheikemonogatari"