・Our research is advanced for the isolation and structure elucidation of the bioactive constituents from various medicinal resources and foodstuffs collected in all over the world. In addition, we also make a study of mode of action, active site, and structure-activity relationship of active constituents. Our main projects are 1) Research on the anti-allergy, anti-cancer, anti-obese, and anti-diabetic constituents from various foodstuffs and medicinal herbs. 2) Research on the bioactive constituents from various medicinal flowers.