Masayoshi Yamaguchi, Ph.D., IOM, FAOE, DDG, DG, is Adjunct Professor, Department of Hematology and Medical Oncology, Emory University School of Medicine, Atlanta, GA, USA (2013-); Visiting Professor in Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, Baylor College of Medicine, Houston, TX, USA (2012–2013); Visiting Professor in Department of Pathobiology, College of Veterinary Medicine, The University of Missouri-Columbia, MO, USA (2012); Visiting Professor in Department of Foods and Nutrition, The University of Georgia, GA, USA (2011 – 2012); Visiting Professor in Division of Endocrinology and Metabolism and Lipids, Department of Medicine, Emory University School of Medicine, GA, USA (2007 – 2011); Professor in Laboratory of Endocrinology and Molecular Metabolism, Graduate School of Nutritional Sciences, University of Shizuoka, Japan (1993 ~ August 2007); Associate Professor in Graduate School of Nutritional Sciences, University of Shizuoka, Japan (1991~1993); Assistant Professor in School of Pharmaceutical Sciences, University of Shizuoka, Japan (1987~1991); Visiting Assistant Professor in The University of Texas Medical School at Huston, USA (1988); Assistant Professor in Shizuoka College of Pharmacy, Japan (1986~1987); Visiting Assistant Professor in Texas Tech University School of Medicine, USA (1985); Visiting Lecturer in The University of Pennsylvania School of Medicine, USA (1981); Research Associate in Shizuoka College of Pharmacy, Japan (1973 ~ 1986). He received a Ph.D. in Pharmaceutical Sciences from Shizuoka College of Pharmacy (1976, Japan). He has completed his B.S. in Pharmaceutical Sciences, Shizuoka, Japan (1971). Dr. Yamaguchi is engaged in the fields of bone and calcium endocrinology and cell calcium signaling since 1971, and these researches are developed in the aspect of biochemistry, molecular biology, endocrinology, metabolism, nutrition, pharmacology, and toxicology. Dr. Yamaguchi has an interesting for cell signaling mechanism, bone biology, nutritional factor and osteoporosis prevention, diabetic osteoporosis, and cancer bone metastasis and osteolysis. Moreover, Dr. Yamaguchi discovered two novel proteins and genes; cell signaling suppressor protein (named regucalcin; 1978) and transcriptional factor RGPR-p117 (regucalcin gene promoter region-related protein; 2001) in mammalian cells. Dr. Yamaguchi generated regucalcin transgenic rats, which were registered as international patents (USA, EU, Japan, and Korea), and this animal is found to induce osteoporosis and hyperlipidemia. Recently, Dr. Yamaguchi proposes that regucalcin is a target molecule in carcinogenesis of various cancer cell types. Currently, the research of regucalcin is focused as a scientific topic. Dr. Yamaguchi published over 500 English articles to professional journals with peer-review. In addition, Dr. Yamaguchi registered over 20 national and international patents in the fields of his research interesting. Dr. Yamaguchi is serving as editors and editorial board members of reputed 40 international Journals. He received many honor and awards; Prize for Sato Memorial Fundation (1992, Japan/USA), Senji Miyata Foundation Award 2005 (Japan), Japan Society for Biomedical Research on Trace Elements Award 2007, The Lifetime Achievement Award from International Biographical Centre (IBC) (2004, England), The World Lifetime Achievement Award from American Biographical Institute (2004, USA), The Distinguished Service to Science Award from IBC (2007, England), and many others. Dr. Yamaguchi is listed in various biographies; Who’s Who in the World (2005-, Marquis Who’s Who, USA), Who’s Who in Sciences and Engineering (2004-, Marquis Who’s Who, USA), International Biographical Dictionary (2006-, IBC, England), and others.