“What point of plant can alleviate human?” this question was trigger to bring me into medicinal and aromatic plants world from molecular genetics which was my major. And I started a study “People plant interaction which can alleviate human stress” in University of Massachusetts Amherst, Medicinal plants program. After I came back to Japan, I worked my organization “Horticulture therapy and Zen” as a director. Regularly tours take place at temple and medicinal plant garden for study about phytotherapy, medicinal plants and spices, and Zen. Recently, I am providing horticulture therapy using hydroponic boxes for the aged suffered dementia in several homes.