The purpose of this article was to create a new kind of problem in the area of "music and emotion" research. Before surveying and reviewing articles about mood responses for music, I redefined "feeling" and "mood" for the purpose of this article. From the reviewed articles. I inferred that mood induction studies were effective to induce positive or negative moods in subjects. Recent studies, however, suggest that negative music not only induces negative mood but positive mood as well. Thus, further studies to clarify the effects of negative music on mood are needed.