The purpose of this paper is to report effective activities in a Japanese culture and society class, that is, investigation announcements regarding themes and making texts for reading by pre-intermediate Japanese learners. In these activities 3 points were recognized, 1) social relations between the learners and others 2) intellectual curiosity to the theme 3) Japanese competence that can consider assumption readers of the text. With these points, this report also shows that the learners went through materials, caught the meaning of the theme, narrowed down problems through dialogue in the class, and developed their own opinion with creating their own expressions.