The fields of study he is best known for: Internal medicine Gene Endocrinology His primary areas of study are Circadian rhythm, Endocrinology, Internal medicine, Suprachiasmatic nucleus and Light effects on circadian rhythm. His study in Circadian rhythm is interdisciplinary in nature, drawing from both Rhythm, E-box and Period. His research links Meal with Endocrinology. The various areas that Sato Honma examines in his Suprachiasmatic nucleus study include Arginine, Vasopressin and Cell biology. His Light effects on circadian rhythm research is classified as research in Neuroscience. The PER1 and CLOCK Proteins research Sato Honma does as part of his general CLOCK study is frequently linked to other disciplines of science, such as Basic helix-loop-helix, therefore creating a link between diverse domains of science.