Abstract
The purpose of this study is to clarify the functions of the Japanese language based on formal classifications, including parts of speech, and then present these functions to native speakers and foreign learners of Japanese. The results show that Japanese expressions of consideration exist across each form. Furthermore, as multiple functions can be identified for a single form, they have complex features. This paper presents a list of functions for each form category, which can be helpful for native speakers of Japanese and foreign learners of Japanese to systematically understand the features of expressions of consideration.
