Hidehito Mukai received his Ph.D. degree in Applied Biochemistry from the University of Tsukuba in 1990. After a postdoctoral fellowship at University of Texas Southwestern Medical Center at Dallas (during which he designed "G protein antagonists"), he advanced his career by working at University of Tsukuba, NEDO Project of MITI, Mitsubishi Kagaku Institute of Life Sciences, and Kyoto Pharmaceutical University. He is now Principal Investigator of Laboratory of Peptide Science and Associate Professor of Graduate School of Bioscience, Nagahama Institute of Bio-Science and Technology from April, 2011. His main research interests are the physiological and pathophysiological roles of "cryptides", novel endogenous regulatory peptides hidden in protein structures, and their "accumulative" signaling mechanisms.