The Kanji B class at Ehime University is a course designed for low-intermediate students and above. The course is conducted in small groups of students with a Japanese language volunteer and is overseen by the main instructor. This study reports the reasons behind why the students chose their "My Best Sentence" from a selection of sentences written during the kanji class. The results of interviews showed that both assessment by the Japanese volunteers and sentence content, which incorporates the individual personality of each student and the content the other students would find interesting, were used to select their sentence.