Mami Matsukawa is a professor at Doshisha University, Japan. She received her PhD from Doshisha University. Her research interests include bone ultrasound, Brillouin scattering and pulse wave analysis. Pak-Kon Choi is a professor emeritus in physics at Meiji University, Japan. He received his PhD from the University of Tokyo in 1979. His research interest includes ultrasonic spectroscopy and acoustic cavitation. He is a co-author of Sonochemistry and the Acoustic Cavitation (Elsevier, 2015). Kentaro Nakamura is a professor at the Institute of Innovative Research, Tokyo Institute of Technology, Japan. He received D. Eng. from the Tokyo Institute of Technology in 1992. His research is focused on high-power ultrasonic applications including ultrasonic actuators as well as optical measurements of ultrasonic field and vibration. Hirotsugu Ogi is a professor at the Graduate School of Engineering, Osaka University. He received his PhD degree from Osaka University in 1997. His research areas are condensed matter physics using ultrasound and protein research using sonochemistry. Hideyuki Hasegawa is a full professor at the Faculty of Engineering, University of Toyama, Toyama, Japan. He received a B.E. degree in electrical engineering and an M.E. and PhD degree in electronic engineering from Tohoku University, Japan, in 1996, 1998, and 2001, respectively. His research interests include ultrasound beamforming and functional ultrasound imaging.