Olfaction is one of the five senses, and is important for several aspects in our daily life, such as detecting hazardous situations and our eating behavior. However, olfaction should not only be seen in itself, but also in relation to the other senses. For example, for flavor perception, olfaction and taste are closely intertwined. Therefore, this symposium highlights the relation between olfaction and the other senses from different perspectives, including diverse research techniques and speakers with various backgrounds. These insights lead to a better understanding of the importance of olfaction in our daily life.