Yoshihisa Yamamoto is the Director of Physics & Informatics Laboratories (PHI Labs), NTT Research, Inc. He received Ph.D. degree from the University of Tokyo in 1978 and joined NTT Basic Research Laboratories. He became a Professor of Applied Physics and Electrical Engineering at Stanford University in 1992. He also became a Professor at National Institute of Informatics (NII) in 2003. He is currently a Professor (emeritus) at Stanford University and NII, and NTT R&D Fellow. He has received many distinctions for his work, including Carl Zeiss Research Award (1992), Nishina Memorial Prize (1992), IEEE/LEOS Quantum Electronics Award (2000), Medal with Purple Ribbon (2005), Hermann A. Haus Lecturer of MIT (2010), and Okawa Prize (2011). His research focuses on quantum optics and quantum information processing, and recently he has been doing research on quantum-to-classical crossover and coherent Ising machines.