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Masayoshi Yamaguchi (山口 正義 Yamaguchi Masayoshi) (born 1947 in Atami, Japan) is a Japanese scientist and researcher in the biomedical fields implicated in biochemistry, endocrinology, metabolism, nutrition, pharmacology and toxicology.
He graduated from Shizuoka College of Pharmacy (B.S.) in 1971, and obtained Ph.D of Pharmaceutical Sciences in 1976, Japan. He was engaged as Research Associate and Assistant Professor in Shizuoka College of Pharmacy (1973 ~ 1987), as Assistant Professor in University of Shizuoka, School of Pharmaceutical Sciences (1987 ~ 1991), as Associated Professor, in University of Shizuoka, Graduate School of Nutritional Sciences (1991 ~ 1993) and Professor in University of Shizuoka, Graduate School of Nutritional Sciences (1993 ~ 2007) in Japan. In 2007, Yamaguchi was invited as Visiting Professor, Emory University School of Medicine, Department of Medicine, Division of Endocrinology and Metabolism and Lipids (2007 ~ 2011), Atlanta, USA. He immigrated in USA with acceptance of permanent residence (2011 ~ ). He collaborated as Visiting Professor at Baylor College of Medicine, Department of Medicine (2012 ~ 2013), Houston, USA. After that, Yamaguchi was appointed as Adjunct Professor, Emory University School of Medicine, Department of Hematology and Medical Oncology (2013 ~ 2016), Atlanta, USA.
Research and Achievement
Yamaguchi's research was focused on the fields of bone and calcium endocrinology, metabolism, cell calcium signaling, gene regulation, nutritional osteoporosis prevention, carcinogenesis, and cancer therapy. Yamaguchi discovered the novel protein and genes which were named as Regucalcin  and RGPR-p117.  Yamaguchi also had over 20 patents. Yamaguchi had over 550 publications of the peer-reviewed English original papers and review articles, and he published 4 English books and 10 editor books. He serviced in science communication as editorial board members over 80 international journals. Yamaguchi was appointed to councilor in many professional societies in Japan including Japan Society for Biochemistry and Endocrine Society for Japan. Yamaguchi was member in New York Academy of Sciences (1996 ~ 2012), American Society for Bone and Mineral Research (1999 ~ 2016), and American Society for Biochemistry and Molecular Biology (2005 ~ ). He was awarded many prizes and honors in National and International societies. Yamaguchi was listed in many biographical books including Who’s Who in the World and Who’s Who in Science and Engineering (Marquis Who’s Who 21st Century Editions, New Providence, USA).
- "j-global entry" (in Japanese). JST. Retrieved 31 July 2011.
- Yamaguchi M (2017): Book, Title: "The Role of Regucalcin in Cell Homeostasis and Disorder". Nova Science Publishers, Inc., New York, page 1-288.
- Yamaguchi M (2009): "Novel protein RGPR-p117: its role as the regucalcin gene transcription factor". Mol Cell Biochem 327:53-63.
- Yamasguchi M, Murata T (2017): "Involvement of regucalcin gene promoter region-related protein-117, a transcription factor, in human obesity (Review)". Biomedical Reports 6:374–378.