**About the Special Issue Editor**

**Satoshi Tanaka** Ph.D., Professor of Pharmacology at Kyoto Pharmaceutical University, is engaged in the basic research of mast cells. He was awarded the degree of Ph.D. for his thesis entitled "Regulation of Histidine Decarboxylase" from Kyoto University in 1999. From 1997 to 2005, he studied the physiological roles of histamine using gene-targeted mice lacking histidine decarboxylase as a Research Associate at the Graduate School of Pharmaceutical Sciences, Kyoto University. During this period, he began his research on mast cells, which are the major source of histamine and one of the essential players of immediate allergic responses. He moved to Mukogawa Women's University in 2005 as Associate Professor and joined Okayama University in 2009. He was appointed Professor of Department of Immunobiology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences in 2012, where he focused attention on the heterogeneity of tissue mast cells and established a culture model of murine cutaneous mast cells. In 2018, he moved to Kyoto Pharmaceutical University. He has focused on functional changes of tissue mast cells during their differentiation and maturation, in particular, the GPCR-mediated regulation of mast cell functions. He is also engaged in the promotion of research integrity. He is a regular member of the American Society for Biochemistry and Molecular Biology (ASBMB) and an associate member of the Committee of Publication Ethics (COPE). ORCID ID: 0000-0002-3468-7694.
