Sleep and Biological Rhythms is the official journal of the Japanese Society of Sleep Research and the Asian Sleep Research Society. Sleep and Biological Rhythms is a quarterly, peer-reviewed scientific and medical journal that publishes original research articles as well as short papers, reviews, case reports and commentaries dealing with sleep and wakefulness, including biological rhythms. Topics onbasic and clinical science, medicine and social science relating to sleep and/or biological rhythms will be considered for publication. By publishing such articles, the Journal aims to promote and extend a healthy and good life for both patients and the general public.