A learning support website was constructed using Moodle and has been used in my classroom. The students in my classes can experience student-based and cooperative activities on the Moodle website. The documents created in text format by the students are accumulated in the database of the website. This paper provides the results of sentiment analysis of career planning documents created in text format. The results indicate that the students feel relief or pleasure by setting targets, enjoying hobbies and so on. Moreover, they yearn for the items such as marriage and family life. On the other hand, they worry about their work-family balance, living alone and so on. I want to store such sentiment analyses and utilize them in mentoring.